The Tierra Blanca Reservoir is a hydraulic waterworks on the Corozal ravine") in an extension of the Venezuelan plain known as Tierra Blanca, located about 10 kilometers from the city of San Juan de los Morros,[1]​ Venezuela. The reservoir is the main source of drinking water supply for San Juan de los Morros and is also an outdoor recreation point for the town due to its artificial wells and boat rides through the dam.[2]​.

The Tierra Blanca reservoir has access through a detour from the National Highway from Villa de Cura to San Juan de Los Morros. This reservoir is fed mainly by the basin transfer from the Guárico River, and a natural depression in rock on the left abutment of the dam, so the contributions from its own basin "Cuenca (geographical accident)") are of little significance. For this reason it does not have a spillway itself, but rather an unlined channel excavated in rock, located in a depression on the right abutment of the dam, through which the impounded water would come out as a result of a possible failure in the operation of the system.[1] The slope "Slope (geology)") of the reservoir upstream is 3:1, while downstream it is 2.5:1.

The reservoir is a national resource dependence of the Ministry of the Environment[3]​ and, although it is considered a recreational park, Tierra Blanca became a Nucleus of Endogenous Development") (NuDE) since 2005, date on which more than 100 lanceros from the Vuelvan Caras Mission took it on as a means of livelihood through the execution of projects such as villas and inns, the remodeling of restaurants and the repair of roads, as well as tourist services that are responsible for coordinating agricultural activities, guides, transportation, care for children and the elderly, and gastronomy.[4]​.

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El embalse de Tierra Blanca es el primero de tres embalses construidos sobre el cauce del río Guárico, los otros dos son la represa de Camatagua") y el Embalse Guárico. Tierra Blanca fue construido para solventar la carencia de agua potable afectaba a la capital del Estado Guárico. Los proyectistas estimaron que los 300 litros por segundos de extracción era suficiente agua para abastecer a 40 mil habitantes hasta el año 2005. Sin embargo, San Juan experimentaría un crecimiento vertiginoso, que hoy la lleva a tener 127 mil habitantes, con una demanda que supera lo estimado, aún complementado con otros 160 litros por segundo provenientes de la captación del Río El Castrero, y ha generado una crisis en el suministro de agua, imponiendo un severo racionamiento que lleva agua potable mediante la red de tuberías al 70% de la población apenas una vez por semana, mientras que el resto es surtida con camiones cisternas.[5]​ La extracción de 600 litros por segundo sería la solución definitiva para un período de 10 a 15 años.[6]​.