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Türkiye's water data and water law, in one place

Translation; the Turkish text is authoritative. TürkçeEnglishالعربية

Türkiye's water · transboundary

Waters shared with neighbours

Summary

Five basins cross Türkiye's borders (Euphrates-Tigris, Meriç-Ergene, Aras, Çoruh, Asi (Orontes)). This page lists 27 treaty, protocol and ratification-law records published in the Official Gazette, 11 other Official Gazette records naming a basin, the reachability of 10 neighbouring-country agencies (4 reachable) and the state of river-flow data. Titles, dates and sources only; no commentary.

This is a list of facts. It shows the titles of treaties, laws and decisions found by searching Official Gazette titles for a neighbouring country or border river together with a water term, each with its date and issue number; the result of calling neighbouring countries' official agency sites from this server; and whether open river-flow data exists. Texts are not copied and nothing is evaluated: there is no legal or political commentary. Record titles stay in Turkish because they are the official document names. Country figures: comparison with neighbours.

Euphrates-Tigris Basin H21

The Euphrates and the Tigris rise in Türkiye and flow to Syria and Iraq (DSİ basin no. 21).

Countries sharing the basin: Syria, Iraq · rivers: Euphrates (Fırat), Tigris (Dicle) · Official Gazette records: 15

Meriç-Ergene Basin H01

The Meriç rises in Bulgaria, follows the Türkiye–Greece border and reaches the Aegean (DSİ basin no. 1).

Countries sharing the basin: Bulgaria, Greece · rivers: Meriç (Evros / Maritsa) · Official Gazette records: 7

Aras Basin H24

The Aras rises in Türkiye and flows along the borders with Armenia, Azerbaijan and Iran (DSİ basin no. 24).

Countries sharing the basin: Armenia, Azerbaijan, Iran · rivers: Aras, Arpaçay (Akhurian) · Official Gazette records: 9

Çoruh Basin H23

The Çoruh rises in Türkiye and reaches the Black Sea in Georgia (DSİ basin no. 23).

Countries sharing the basin: Georgia · rivers: Çoruh · Official Gazette records: 8

Asi (Orontes) Basin H19

The Asi (Orontes) rises in Lebanon, enters Türkiye through Syria and reaches the Mediterranean (DSİ basin no. 19).

Countries sharing the basin: Syria, Lebanon · rivers: Asi (Orontes) · Official Gazette records: 7

Euphrates-Tigris Basin 15 records

Treaties, protocols, memoranda and ratification laws:

Other Official Gazette records naming the basin or river (investment, expropriation, tariffs; not treaties):

Meriç-Ergene Basin 7 records

Treaties, protocols, memoranda and ratification laws:

Other Official Gazette records naming the basin or river (investment, expropriation, tariffs; not treaties):

Aras Basin 9 records

Treaties, protocols, memoranda and ratification laws:

Other Official Gazette records naming the basin or river (investment, expropriation, tariffs; not treaties):

Çoruh Basin 8 records

Treaties, protocols, memoranda and ratification laws:

Other Official Gazette records naming the basin or river (investment, expropriation, tariffs; not treaties):

Asi (Orontes) Basin 7 records

Treaties, protocols, memoranda and ratification laws:

Other Official Gazette records naming the basin or river (investment, expropriation, tariffs; not treaties):

Official agencies of neighbouring countries: reachability

Link and HTTP status only; no description text is taken. Measured from this server on 16 October 2026; an unreachable site does not mean the agency publishes nothing.

Official agencies of neighbouring countries: reachability
CountryAgencyBasinReachability
IraqSu Kaynakları Bakanlığı (Ministry of Water Resources) (www.mowr.gov.iq)Euphrates-Tigris Basinnot reached: HTTP 403
SyriaSu Kaynakları Bakanlığı (Ministry of Water Resources) (mowr.gov.sy)Euphrates-Tigris Basin, Asi (Orontes) Basinnot reached: domain name did not resolve
IranEnerji Bakanlığı (Ministry of Energy — su işleri) (www.moe.gov.ir)Aras Basinnot reached: timed out
GreeceÇevre ve Enerji Bakanlığı (YPEN) (ypen.gov.gr)Meriç-Ergene Basinnot reached: HTTP 403
BulgariaUlusal Meteoroloji ve Hidroloji Enstitüsü (NIMH)Meriç-Ergene Basinreachable (HTTP 200)
BulgariaÇevre ve Su Bakanlığı (MOEW)Meriç-Ergene Basinreachable (HTTP 200)
GeorgiaUlusal Çevre Ajansı (NEA)Çoruh Basinreachable (HTTP 200)
ArmeniaÇevre BakanlığıAras Basinreachable (HTTP 200)
ArmeniaSu Kaynakları Yönetim Ajansı (WRMA) (wrma.am)Aras Basinnot reached: HTTP 403
AzerbaijanEkoloji ve Doğal Kaynaklar Bakanlığı (eco.gov.az)Aras Basinnot reached: timed out

River-flow (discharge) data

Method and limitsOfficial Gazette title search · filter rule · reachability check

Records come from a title search of the Official Gazette archive (from 1923): a treaty type or a water term plus the name of a neighbouring country or border river in the title; basin assignment by river first, then country; texts are not fetched. Treaties whose title carries no water term (for example economic-cooperation protocols or annexes to friendship treaties) do not appear with this method; titles are taken as they stand in the Official Gazette table of contents, so truncated or broken characters come from the source. Titles on non-water subjects (nuclear, culture and tourism zones, railways, smuggling, ports and shipping, customs, border gates) are dropped; "hudut" (border) alone does not count as a water term. Class: treaty type, or treaty/protocol/memorandum/convention/minutes in the title, counts as a treaty; the rest are decisions and laws naming a basin. Search terms (Turkish): Suriye, Irak, Yunanistan, Yunan, Bulgaristan, Bulgar, İran, Sovyet, Sovyetler, Rus, Gürcistan, Ermenistan, Azerbaycan, Fırat, Dicle, Meriç, Aras, Arpaçay, Çoruh, Asi, Sarısu, Ahuryan, Posof, Hudut Suları, Sınır Suları. Last run 16 October 2026 (status: received; titles scanned: 1,462); re-run monthly (8th of the month, 01:40 UTC). Record titles are as in the Official Gazette table of contents; the text is in the linked Official Gazette issue. Compilation CC BY 4.0; Official Gazette titles are official publications (Law 5846 art. 31). Data: /veri/sinir-otesi.json.

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