Hydrography
La Gran Sabana, and the rest as Venezuela in general, is rich in river networks. The main drainage sub-basins are formed by the rivers Yuruaní, Aponwao, Kukenán, Suruku, Ikabarú, Karuay, Urimán and Antabare.
Note that the Caroní River, of 925 km in length, and flow rate equal to 5000 m³/s, from which Venezuela gets most of its electricity by hydropower exploitation with, originates from several tributaries coming from tepuis and mountains of the Gran Sabana, as the Aponwao, the Yuruaní and the Kukenan. The vast majority of rivers and streams in the region are of dark waters, with coloration similar to that of tea. The waters are very poor in dissolved nutrients and rich in humic acids and tannins, which give them its characteristic brown color. The acidity is quite high, reaching PH3-4, and although this may cause acidity in visitors that taste first these waters, it can say that these are among the least polluted waters in the world. As to tourist interest, the rivers are of great importance, as visitors who travel the roads of the Gran Sabana usually use for recreation, swimming, and camping. These are usually easily accessible and that the entries are found throughout the main road, and many are arranged with steps for easy access. At several points, the Pemones offer guidebooks and/or ask for contributions of money in exchange for keeping clean areas.
Read more about this topic: La Gran Sabana, Geography