Portal de Periódicos da CAPES

Evaluación del estado trófico y comparación de modelos relativos al fósforo en los embalses de Cernadilla y Valparaíso (río Tera, Zamora)

1995; Volume: 11; Issue: 2 Linguagem: Inglês

10.23818/limn.11.11

2660-8537

Henar Fraile,

Water Resource Management and Quality

VALPARAISO RESERVOIRS (TERA RIVER, ZAMORA) Cernadilla (1965) and Valparaíso (1988) reservoirs, located in the river Tera which is a tributary within the Duero basin (Zamora), are used to produce electric energy and provide irrigation.The trophic state of the headwater reservoir (Cernadilla) has became worse since Valparaíso construction.In 1991, the interna1 phosphorus loading was 120,97 mg TP.m summer in Cernadilla, and 30,92 mg TP.m2 summer in Valparaíso.These estimates were calculated from the increased mass of hypolimnetic phosphorus divided by the surface area of the reservoir.The rates of phosphorus release from anoxic sediment surfaces were 14,40 and 6,2 mg TP.m2 d ', in Cernadilla and Valparaíso respectively.Both reservoirs were classified as mesotrophic in 1991.