Mar Chiquita is the largest of the naturally occurring saline lakes in Argentina. The feeder systems for the lake include the Dulce River from the north, and the Primero/Suquia and Segundo/Xanaes Rivers from the south.
The Dulce River, as the principle feeder, has a heavy saline content, and increased drawing of the river upstream for irrigation has affected the levels of the lake. Additionally, long drought periods have diminished recharge capabilities.
The result is a diminished lake size and increased salinity. Environmental studies are continuing to measure the regional impact of the changes to lake size and quality. Landsat satellite imagery, acquired in 1988 and 2011, are useful for illustrating the changes.