Causeway Separating Lake Urmia into Two Halves, Iran

The northern half of Lake Urmia, in Iran, appears greenish, while the southern half is rusty red in color. The lake is divided into northern and southern parts separated by a causeway, in which a 1500m gap provides little exchange of water between the two parts. The causeway is visible in this image, near the center of the lake. Due to drought and increased demands for agricultural water in the lake’s basin, the salinity of the lake has risen to more than 300 g/L during recent years, and large areas of the lake bed have been desiccated. These dessicated areas appear as white salt flats.
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Lake Urmia (farsi: دریاچه ارومیه‎, Daryache-ye Orumiye, Turkish:is a salt lake in northwestern Iran, near Iran's border with Turkey. The lake is between the Iranian provinces of East Azerbaijan and West Azerbaijan, west of the southern portion of the similarly shaped Caspian Sea. It is the largest lake in the Middle East, and the third largest salt water lake on earth, with a surface area of approximately 5,200 km² (2,000 mile²), 140 km (87 mi) length, 55 km (34 mi) width, and 16 m (52 ft) depth. Lake Urmia is protected as a "National Park" by the Iranian Department of Environment.