Rain is the main water resource in Syria, affecting the availability of all other water resources. The average annual rainwater resource is estimated at 46 billion cubic metres (BCM). In drought years, this figure is much lower. Furthermore, the rainfall is unevenly distributed in both space and time. Rain and sometimes snow fall between October and May, mainly in the mountains. The country is divided into five zones based on the average annual precipitation. This dataset contains the distribution of lakes and rivers.
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