Editing Caracas (section)

=== Hydrography ===

The hydrographic network of the city of Caracas is made up of the Guaire river basin which is a sub-basin of the Tuy river. This basin crosses the valley where the city is located from West to East (Las Adjuntas – [[Petare]]). It covers about 655 square kilometers, about 45&nbsp;km. long and about 15&nbsp;km. wide, has a rectangular shape. The basin is formed by the Caracas Valley, which is relatively high, narrow and long, surrounded by the high and steep Cordillera de la Costa, which runs parallel to the Litoral.

Among the characteristics of the hydrographic network associated with the city of Caracas is the high degree of contamination present in the lower parts of the [[Guaire River]] due to its tributaries having been used for sewage collection since 1874, during the government of Antonio Guzmán Blanco, until today. The level of contamination is such that it does not allow the maintenance of the life of the species that once populated the basin, and it has become extinct or has been restricted to the highest areas of the basin, mainly within the boundaries of the national park. Avila. Awareness for the recovery of the basin has recently begun, however, much remains to be done before results can be observed.

Among the main rivers and streams that make up the basin are in its northern slope: San Pedro River, Macarao River, Quebrada Caroata, Catuche River, Anauco River, Chacaito River, Tocome River, Caurimare River; on its southern slope we find that among the main [[tributaries]] are: El Valle river, Quebrada Baruta and Quebrada La Guairita. In the upper part of the basin there are two reservoirs with the purpose of supplying water to the western part of the city; These are the Macarao Dam and the La Mariposa Reservoir.