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Inventory of Shared Water Resources in Western Asia

image of Inventory of Shared Water Resources in Western Asia
This publication is the first UN-led effort to make a comprehensive assessment of the state of transboundary surface and groundwater resources in the Middle East. It follows a standardized structure, with eight surface water chapters and 19 groundwater chapters that systematically address hydrology, hydrogeology, water resources development and use, international water agreements and transboundary water management efforts. The chapters cover all rivers and groundwater resources shared between Arab countries in the Middle East and include data on water resources that are shared with Iran, Israel and Turkey. Boasting over 50 new maps and 200 figures, tables and boxes with recent, comprehensive data series, the Inventory provides an up-to-date view of the state and evolution of shared water resources in the region.

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Tigris River Basin

The Tigris River is the second largest river in Western Asia. Its basin is shared by four countries: Iran, Iraq, Syria and Turkey. Besides contributions from precipitation that originates in the Armenian Highlands, the Tigris is fed by numerous tributaries that rise in the Zagros Mountains in Iran, Iraq and Turkey. The Tigris has a higher water yield than the Euphrates River. Historically, the natural annual flow of the Tigris at the Iraqi-Syrian-Turkish border was around 21 BCM. In recent years, Tigris flow volumes have been affected by large water development projects in Iraq and Turkey. The flow volume records for Kut show a significant negative trend. Water supplies to the Mesopotamian Marshlands have also dwindled over the past 40 years.

English

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