Edited sentence: Climatically the region is characterized by having only two seasons during the year: a rainy season lasting from May to October and a dry season from November to April with a short dry season of approximately 2 weeks starting at the end of July or the beginning of August.Flooding is a result of hurricanes sometimes passing.Importantly, the only way to guarantee water supply during the dry season is to store water during the rainy season.In the case of Tegucigalpa, a city with around 1 million inhabitants, water is provided naturally by the Choluteca River and its tributaries that together form the Cabeceras catchment.The catchment area is located in southern Honduras where it stretches over four administrative departments (Francisco Morazán, Choluteca, El Paraíso and Comayagua) covering 7,848 km2 (LOTTI, 2005) and drains into the Pacific Ocean.The main problems for the capital are shortage of drinking water, bad water quality in the river and severe risk for flooding.The two first problems are related because all water is used for drinking purposes, turning the river into a principally sewage fed stream.The upper Choluteca River supplies water to the capital of Honduras, Tegucigalpa