Internal Sea and lake are completely surrounded by the land. The amount of salinity in the Dead Sea is found to be 238 per thousand due to the factors like the high temperature, excessive warm and dry winds, more evaporation and lack of rainfall etc. The amount of salinity in the southern part of the Caspian Sea is 170 per thousand. In the northern part, it is only 14 per thousand. In the northern part of the Caspian Sea, the Ural and Volga Rivers provide the availability of the clean water. The highest salinity in the world is found in the Van Lake of Turkey which is 330 per thousand.
