In the Henares system there are four large state‑owned reservoirs located on right‑bank tributaries of the River Henares:

• Beleña Dam, 57 metres high, classified as Category A, is an embankment dam with a central clay core. The reservoir is intended to supply the Sorbe, La Muela and Campiña Baja water associations.

• Alcorlo Dam, 73 metres high, is a rockfill dam with a central clay core. It meets the water demand of the Bornova Water Association and the irrigated areas of the Bornova and Henares systems.

• Pálmaces Dam, 43 metres high, classified as Category A, is a straight‑gravity dam. The reservoir provides support to Alcorlo for supplying the irrigated areas of the system.

• El Atance Dam, 44 metres high from foundation level, also Category A, is a gravity dam with roller‑compacted concrete (RCC). The reservoir supports the water supply to the irrigated areas.

In the Tajuña system is located La Tajera Dam, on the River Tajuña itself, 62 metres high, classified as Category A and designed as a double‑curvature arch dam. Its reservoir supplies the Almoguera‑Mondéjar water association and the irrigated area of Vega del Tajuña.

In the Headwaters system are located the reservoirs of Entrepeñas, on the River Tagus, and Buendía, on the River Guadiela, connected by a 3 km tunnel and forming the headworks of the Tagus–Segura transfer, together with Pareja Dike, used for recreational purposes:

• Entrepeñas Dam, 87 metres high, is classified as Category A and is a straight‑gravity dam.

• Buendía Dam, 78 metres high, is also classified as Category A and is a gravity dam.

• Pareja Dike, located in a floodable area of the Entrepeñas reservoir, is 19 metres high, classified as Category C and is an embankment structure with a central clay core.

In addition to these main infrastructures, the contract also covers other facilities and ancillary works associated with the aforementioned dams.

La entrada Technical Assistance for the Analysis and Studies for Project Drafting in Operating Zone 4 (Tajo River Basin) se publicó primero en Ain Active.

• Generation of a consistent 32-year series of daily natural flow rates in each of the watersheds, calibrated based on gauged flow rates.

• Determination of flood flows for different return periods.

The process followed was as follows:

• Digital terrain modeling and extraction of hydrological information using the ArcGis application and extensions such as ArcHydro, HEC-GeoHms, and ArcSWAT.

• Geomorphological analysis of the watersheds.

• Analysis of climatological information.

• Flow rate study using the Visual Balan model.

• Flood study using the HEC-Hms model.

Additionally, AIN active conducted a sedimentological study to estimate the number of years needed for the sedimentation of the reservoir.

La entrada Hydrological and Sedimentological Study for the Huacata Hydroelectric Project se publicó primero en Ain Active.