Water and river systems
The Sierra de Las Nieves Natural Park is the source of diverse rivers and streams, which drain either to the eastern or western seaboard of the province of Malaga. The Río Turón and the Río Grande run through the Guadalhorce basin, flowing into the sea at the city of Malaga, whereas on the other side of the province, tributaries flow into the Río Verde and the Río Guadiaro, the latter entering the sea near Sotogrande and the former being collected in Istán at the La Concepción reservoir.
Rainfall is generally torrential, and only a few of the rivers and tributaries flow throughout the year.
The high limestone content has resulted in karstic aquifers, with water filtering extremely quickly into the mountains and forming underground springs.