Mesopotamian Marshlands Restoration — Ahwar of Southern Iraq

Iraq's Mesopotamian Marshlands — the Hawizeh, Central, and Hammar wetlands fed by the Tigris and Euphrates — were deliberately drained by Saddam Hussein's regime in the 1990s, shrinking from an estimated 15,000–20,000 km² to under 10% of that extent and displacing hundreds of thousands of Marsh Arabs (Ma'dan). After the 2003 regime change, Iraq's Ministry of Water Resources established the Centre for Restoration of Iraqi Marshlands and Wetlands (CRIM) in January 2004, working alongside the NGO Nature Iraq (founded by hydrologist and 2013 Goldman Environmental Prize winner Azzam Alwash) and international partners including UNEP, to breach dykes and re-flood the marshes.

Recovery has been substantial but highly volatile. A 2006 UN assessment found 58% of the historic marsh extent re-inundated, peaking near 75% by 2008, before falling back with drought. A peer-reviewed hydrology study (2009–2020 data) recorded average re-inundation of 47% (Hawizeh), 61% (Hammar) and 30% (Central marshes). More than 200 bird species and 40+ fish species now use the wetlands, and by 2020 an estimated 250,000 Marsh Arabs had returned to the region — all four marsh units are Ramsar-designated wetlands, and the site was inscribed as a UNESCO mixed World Heritage property in July 2016.

The restoration remains fragile. Upstream damming — including Turkey's GAP/Ilisu dam projects and Iran's weir on the Karkheh/Hawizeh system (completed 2009) — has cut Tigris-Euphrates flows, and the 2021–2025 drought years pushed submerged marshland down to as little as 8% of historic extent, displacing over 170,000 people since 2018, cutting buffalo herds by more than 76%, and collapsing fish catches. Heavy 2025–26 winter rains lifted coverage back to roughly 32–36%, but the UN's own 2025 assessment warns that 'recognition without restoration will remain hollow' given fragmented governance across ministries and unresolved transboundary water disputes.

Read the full analysis: https://iraq.un.org/en/308406-mesopotamian-marshes-world-heritage-brink