Sri Lanka river names & sources

Find English, Sinhala and Tamil names for 45 Sri Lankan rivers and tributaries. Check name references, map notes and the sources behind the explorer.

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River names in English, Sinhala and Tamil

Browse 45 rivers and tributaries. Choose Explore to find a river on the map, or open its references to check a name or mapped section.

Sources & map details

Each river links to the references used for its names and mapped sections. Open the full list for publication details, map notes and reuse terms.

View all 70 references

Map data review: . Dataset 0.6.1.

  • Annual Performance Report 2024

    Irrigation Department, Sri Lanka

    English section, printed page 16 (PDF page 175, counting from 1): paragraph listing rivers covered by flood warnings.

    Accessed .

    Supports the English names Mahaweli River and Kelani River only. Report year is not a verified publication date. No report prose, maps or geometry are reproduced; no upstream open-data license has been established.

  • ජල තත්ව පසු විපරම් රසායනාගාර ඒකකය

    Central Environmental Authority, Sri Lanka

    Section රට අභ්‍යන්තර මතුපිට ජලාශ වල ජලයේ තත්ත්වය පරීක්ෂා කිරීමේ වැඩ සටහන: monthly water-quality monitoring list.

    Accessed .

    Sinhala river names are transcribed from the monitoring list, preserving the source spelling. The page's last-updated date is not treated as its publication date. Copyright remains with the publisher; no source prose or geometry is reproduced.

  • நீரின் தரம் சம்பந்தமான அலகு

    Central Environmental Authority, Sri Lanka

    Section தற்போது இடம் பெற்றுவருகின்ற நீர் தர கண்காணிப்பு நிகழ்ச்சித்திட்டம்: monthly water-quality monitoring list.

    Accessed .

    Tamil river names are transcribed from the monitoring list without translation. The page's last-updated date is not treated as its publication date. Copyright remains with the publisher; no source prose or geometry is reproduced.

  • OpenStreetMap copyright and data license

    OpenStreetMap Foundation

    OpenStreetMap licensing and How to credit OpenStreetMap sections; data-form distribution links directly to https://opendatacommons.org/licenses/odbl/1-0/ .

    Accessed .

    OpenStreetMap data is distributed under ODbL 1.0. Redistribution/adaptation requires attribution and compliance with its share-alike and other terms. The geometry-bearing rivers.json database is distributed under ODbL 1.0; this does not relicense Haritools application code or original source documents. Required attribution: © OpenStreetMap contributors.

  • Sri Lanka OSM source snapshot, 9 October 2026

    OpenStreetMap contributors, via Geofabrik

    sri-lanka-261009.osm.pbf; source SHA-256 2bd8089ee5e8b266e325a46b540a89d4d24657e35b1805c682129d2be31e764b; OSM replication timestamp 2026-10-09T20:21:04Z. Prepared waterways.objects.json SHA-256 4ee979e4c34d5b938611ac9c597590e634fe920352c484e6ea22f616112d9fb1. Per-way versions, timestamps and geometry hashes are retained in course-evidence.json.

    Accessed .

    Locally recovered, hash-verified preparation of the pinned source snapshot, originally inspected 2026-10-12. The historical download may no longer be available online. The older staging export has an unknown snapshot date and is not used to reproduce these courses. © OpenStreetMap contributors; ODbL 1.0.

  • Parliamentary Debates, 8 July 2008 — river-name tables

    Parliament of Sri Lanka

    Annexes 1 and 2, PDF pages 9–10 (counting from 1). Proper names only; lengths, origins and other table claims are not imported.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Divi rakina diya kandura — published Sinhala river-basin names

    Lankadeepa / Wijeya Newspapers

    Numbered table under ලංකාවේ ප්‍රධාන ගංගා නිම්න. Supports published Sinhala usage, not official name status or river geometry.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Sri Lankan rivers — Sinhala educational name list

    Shilpa Sayura Foundation / Shilpa64

    Numbered Sinhala river-name list; river names only. Unrelated educational claims and numeric lengths are not imported.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Flood-prone river basins — Sinhala names

    Disaster Management Centre, Sri Lanka

    Sinhala paragraph listing river basins potentially affected by flooding, including අත්තනගලු ඔය. Historical language evidence only; this is not a current warning.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Annual Report 2021, Sinhala statistical appendix

    Central Bank of Sri Lanka

    Irrigation / agricultural project table, row රඹකැන් ඔය. This supports the proper-name spelling used for the eastern irrigation project; no statistics are imported.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Geographic conditions of Uva Province

    Uva Provincial Council

    Paragraph identifying උමා ඔය and ලොග්ගල් ඔය as tributaries joining Mahaweli. Proper names only.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • History model assessment — marking scheme

    Ministry of Education / e-Thaksalawa

    ET/SSS/2022(2023)/OL/33/S/Q/S-2, printed page 8, question 5(i), item B: අඹන් ගඟ.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Ulhitiya reservoir spillway release

    Independent Television Network (ITN)

    Final Sinhala paragraph explicitly names උල්හිටිය ඔය as the receiving watercourse. Historical name evidence; not a current warning.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Ratnapura flood early-warning system

    Disaster Management Centre, Sri Lanka

    Final Sinhala paragraph listing Kalu tributaries and the name කුරු ගඟ.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Upper Ratnapura special tourism zone programme 2021–2024

    Sabaragamuwa Provincial Planning Secretariat

    Section 12.1, printed page 48: බෙලිහුල් ඔය ආශ්‍රිත සංචාරක ආකර්ෂණ ස්ථාන. Supports local proper-name usage; no tourism or river-course claims are imported.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Sithawakapura development plan 2024–2034

    Urban Development Authority, Sri Lanka

    Printed page 84, flood discussion explicitly names කැළණි ගඟ සහ සීතාවක ගඟ. Large PDF; the locator identifies the Sinhala river name, not merely the town.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Nuwara Eliya development plan 2021–2030, Volume I

    Urban Development Authority, Sri Lanka

    Table 23, Nanu Oya land-use table, water row ජලය (නානු ඔය). Proper watercourse name only.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Kurundu Oya falls — Sinhala field description

    AmazingLanka.com

    First watercourse-description paragraph explicitly identifies කුරුඳු ඔය. Name only; waterfall dimensions and travel recommendations are not imported.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Rakwana river-bank tree planting

    Lankadeepa / Wijeya Newspapers

    Article dated 7 September 2020; title and first paragraph name රක්වාන ගඟ. This is published Sinhala usage, not an official naming determination.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Galigamuwa Pradeshiya Sabha area

    Galigamuwa Pradeshiya Sabha

    Natural drainage paragraph names ගුරුගොඩ ඔය and describes the watercourse on the western boundary.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Kelani river and riverside life — Sinhala name usage

    Roar Media Sinhala

    ගඟක ඇරඹුම section and hydropower section explicitly name කෙහෙල්ගමු ඔය. Only the proper name is transcribed.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • List of Sri Lankan rivers — Sinhala published forms

    Info Sri Lanka (independent educational blog)

    Rows අක්කරායන් ආරු, නෙතේලි ආරු and වාලුක්කායි ආරු in the river-name table. Secondary, non-government source; forms require further local/official corroboration. Only names, not lengths or geography, are used.

    Accessed .

    Supports Sinhala proper-name usage only. No geometry, numeric facts, map images or source prose are reproduced.

  • Kukuloya / Kandy — bilingual local-name evidence

    Uthpala Dilhan / SLTB Buses photo archive

    10 August 2014 entry, Ruby-bodied Tata bus: bilingual caption identifies Kukuloya and කුකුල්ඔය on route 620 to Kandy. This is place-name spelling evidence, not a published Sinhala hydronym; association with the OSM-named stream remains editorial.

    Accessed .

    Provisional Sinhala river label inferred from bilingual local place-name spelling. This publication names the Kukuloya locality near Kandy, not the watercourse. The independent English floristic study identifies the Kukul Oya stream at Moraella in the Knuckles valley. A direct Sinhala hydronym source is still required; do not conflate with the Kalu-basin Kukule Ganga.

  • A floristic survey of a unique lowland rain forest in Moraella in the Knuckles valley, Sri Lanka

    Medawatte et al., Ceylon Journal of Science (Biological Sciences), 40(1), 2011

    Study-site description and Figure 3: Kukul Oya stream at Moraella, a Hulu Ganga tributary in the Knuckles valley. English watercourse identity and location only; does not supply a Sinhala spelling.

    Accessed .

  • Attanagalu / Dandugam lower-reach naming

    Japan International Cooperation Agency (JICA)

    Printed page 87, Kalu Ela–Dandugam Oya Scheme: identifies the lowermost Attanagalu reach as Dandugam Oya. Only the naming relationship is used; no lengths or mapped coordinates are transcribed.

    Accessed .

    Supports including the connected OSM ways tagged Dadugan Oya as the lower continuation. It does not verify the separate provisional gap connection.

  • Mahaweli River: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 23811570, 48747431, 97085307, 820223788, 820223789, 966865322, 966865323, 966866146, 966866662. Identity relations: 6232547. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-mahaweli.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kelani River: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 30465745, 362361136, 415174905, 420113469, 420113470, 823750455, 889410860, 968613183, 972615469. Identity relations: 6232495. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kelani.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Deduru Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 107953750, 302711278, 636755000, 749316186. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-deduru-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kalu Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 30465766, 490244091, 490245290, 490245389, 490249066, 682243450. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kalu-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Malwathu Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 161822661, 312351040, 1138019248, 1138019252, 1144105517, 1144105522, 1563447583. Identity relations: 19451506. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-malwathu-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Menik Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 140154817, 231899777, 231899790, 817350137, 817350138, 817350139, 821525743, 936698489, 936753924, 1120400240, 1327580403, 1328437779, 1328439305, 1329008087, 1339060792, 1339060794, 1465138093. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-menik-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Yan Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 194874320, 401309139, 401484857, 401484858, 401484859, 401484860, 401797278, 401797282, 405847253, 428754601, 428756663, 430869411, 430869412, 890797119, 1447372789. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-yan-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Gal Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 188057663, 510046710, 1118121035, 1118121036, 1125323027, 1126452337, 1248255749, 1248255750, 1342757692, 1342757693, 1348177214, 1348177215, 1447372790. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-gal-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Heda Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 231402211, 231404330, 231404339, 231404351, 440713699, 1121006321, 1136708847, 1136737195, 1252094795, 1252094805, 1252308317, 1307999943. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-heda-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Rambakan Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 352024155, 452365986, 967061737, 1240257004, 1240257007, 1240258789, 1241137268, 1241330771, 1241362064, 1241362065, 1241389141, 1342757685, 1515135827, 1562531438, 1562531439. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-rambakan-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Eastern Rambakan Oya only; exclude Rambukkana Oya way 660414574 near Kandy. Unnamed stream 1241389141 is the source-mapped connection between the named eastern sections. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Pali Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 462038526, 472049450, 472054843, 472241703, 472241704, 472437038, 806065030, 1315336465, 1315336466, 1315336473, 1446906771. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-pali-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kumbukkan Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 231821732, 553386708, 1126533213, 1321942188, 1324171876, 1327580404, 1335380485, 1335380487, 1337819982. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kumbukkan-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Modaragam Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 768749077, 1143836474, 1144030197, 1144105523, 1412505178, 1412505179, 1412505180, 1412505181. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-modaragam-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Walawe Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 129955374, 129955412, 129958551, 287000158, 315934299, 394766073, 487046301, 487048907, 498690253, 748685576. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-walawe-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kirindi Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 251735378, 255393925, 385662687, 491549301, 498013248, 498013255, 578432571, 821525742. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kirindi-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kala Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 196176332, 539071917, 661332141, 1143988551, 1143988553, 1143988554, 1144160869. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kala-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Bentota Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 29339327, 128541718, 358218709, 358218710, 523420870, 523420878. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-bentota-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Attanagalu Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 48671061, 108188388, 377436885, 381402337, 384844790, 390373936, 397190056, 404358946, 746524794, 746524795, 965656007, 965656008, 965656009, 965656010, 965656011, 965656012. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-attanagalu-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Includes the source-tagged Dadugan Oya lower continuation, supported by the JICA naming description. Two unnamed source streams extend the upper reach through shared node IDs. The upper-to-middle gap remains unverified and is displayed separately as a dashed editorial join; it is not part of source geometry. The separate canal-tagged Attanagalu way 193042830 is excluded. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Maha Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 225067715, 342752977, 643060308. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-maha-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Gin Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 128673307, 398922233, 399964179, 565210643, 753537123, 917505243, 1301832431, 1301832432, 1301832433, 1311727068, 1311727071, 1311727072. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-gin-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Mee Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 545332674, 545332688, 545335320, 545335321, 545336014, 545337832, 545337833, 545337836, 545339445, 545339778, 545340601, 545341825, 545342818, 545342821, 545343458. Identity relations: 7791358. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-mee-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Main-stream members of relation 7791358 identify the northwestern Mee Oya. Northeastern ways 404303347 and 463698554 are a different Mee Aru and are excluded. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Nilwala Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 315100281, 345540431. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-nilwala-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Maduru Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 386197318. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-maduru-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Uma Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 48746366, 287992502, 287992503, 379963444, 379964001, 380423576, 380423696. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-uma-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Amban Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 108180527, 108180530, 191211566, 287420701, 287420858, 325856955, 355036580, 964974369, 1354807916, 1354807917, 1354807918, 1354807919. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-amban-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Ulhiti Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 186722883, 498898906, 498899903, 660409203. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-ulhiti-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kuru Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 192700024, 258733628, 258733629, 507850986, 1106145540, 1106145541. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kuru-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kukul Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 249638439, 1092284916, 1092284917. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kukul-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. The source-named Kukul Oya near 80.72 E, 7.40 N. The staging inventory incorrectly associated this candidate with the Kalu basin; the separately named Kukule waterway (362678505) is excluded. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Belihul Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 265826318, 416166954, 1357854252. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-belihul-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Seethawaka River: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 452804094. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-seethawaka.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Nanu Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 258337371, 352026690, 454198553, 506369911, 784194231, 1488979034. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-nanu-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Loggal Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 472063091, 472067997, 472067998, 1110231006, 1110231007. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-loggal-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kurundu Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 490207592, 490210414, 490210415, 490211133. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kurundu-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Rakwana Ganga: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 497943894, 516631373, 516631374, 788650303. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-rakwana-ganga.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Gurugoda Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 238814471, 316623661, 316623678, 700674047, 996479179, 1080069926. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-gurugoda-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kehelgamuwa Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 1243371744. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kehelgamuwa-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Chippi Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 317631614, 317632544, 716561677, 716561678. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-chippi-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Valukki Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 388425423, 1264085056, 1264085057, 1264085058, 1264085059. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-valukki-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Neththali Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 461632222, 461632223, 461632224, 461682468, 461876215, 461876217, 461876218, 461876219, 461876220, 841285919. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-neththali-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Akkarayan Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 471835799, 471840255, 471840256, 471840257, 471840258, 471840259, 471844027. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-akkarayan-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Paranki Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 473522006, 473522008, 473522009. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-paranki-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Per Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 665788177. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-per-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. The Peraru River source way 665788177; not the separate source-named Peraru way 130918268 farther northeast. No basin or district association is inferred from the shared name. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Kanagarayan Aru: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 317463761, 461488638, 461488639, 461488640, 461488641, 461488643, 461488644, 461488646, 461488647, 461488648, 461488649, 461675259, 461675260, 461876216, 621395388, 754006306, 754006307. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-kanagarayan-aru.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Wila Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 440713437, 1126472331, 1126472332, 1126477015. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-wila-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.

  • Malala Oya: OSM identity and mapped course

    OpenStreetMap contributors, via Geofabrik

    Pinned snapshot geofabrik-lka-2026-10-09. Ways: 641770434, 641771002, 641771016, 641771025, 1290839632. Source name and language tags, versions and geometry checksums: course-evidence.json, record river-malala-oya.

    Accessed .

    English display label normalized from the selected source names; this is not an official naming determination. Localized names, when supplied by this source, are transcribed from language tags. Source-identified mapped sections; full headwaters-to-mouth coverage is not established. Mutable OSM links may show newer data; reproduction uses the pinned extract only.