Chott Melrhir
Chott Melrhir () also known as Chott Melghir or Chott Melhir is an endorheic chott-kind of salt lake in northeastern Algeria. It is the westernmost part of a series of depressions, which extend from the Gulf of Gabès into the Sahara. They were created between Miocene and Early Pleistocene as a result of compression accompanying the formation of the Atlas Mountains. With the maximum area of about , it is the largest lake in Algeria. It lies almost entirely below sea level and contains the lowest point in Algeria, . Its size varies over the year and is usually larger than from east to west. The nearby cities are Biskra (60 km north-west), El Oued and Touggourt (85 km south). Hydrology, geology and geography During the rain season in winter, the lake is filled by numerous wadi (periodically drying rivers), mostly from north and north-west. The largest of them are the Djedi and Arab running from west to east down the slopes of Aurès Mountains. Others include Abiod, Beggour Mitta, Biskra, Bir Az Atrous, Cheria, Demmed, Dermoun, Derradj, Djedeida, Djemorah, Halail, Horchane, Ittel, Mechra, Melh, Mzi, Messad, Oum El Ksob, Soukies, Tadmit and Zeribet. In summer, the lake and most