一个抽水水库的沉积物及其无机磷含量的分布特点

通过对抽水水库——大镜山水库沉积物粒径组成以及沉积物的无机磷形态分级分离的测定,研究了抽水水库沉积物及其无机磷含量的分布特点。结果表明,4个特征区域沉积物粒径组成差异较大,总无机磷含量在水库4个区域从入出水口至库尾呈明显的递减趋势,无机磷组分中,以O-P平均含量最高,其次是Fe-P,再次Ca-P、Al-P,抽水水库的进水与出水的方式及位置与典型水库虽然有很大的差异,但其沉积物及无机磷的分布都服从水动力学原则,沉积物中无机磷的分布与入库水动力学特点一致。各无机磷形态特别是Fe-P和Al-P在空间分布上表现有较大的差异,可能与无机磷结合态的活性有关。

Spatial Distribution of Sediments and Contents of Inorganic Phosphorus in a Pumped Storage Reservoir

Through measuring the particle size fractions and the contents of 5 inorganic phosphoric in sediments of a pumped storage reservoir-Dajingshan Reservoir, the spatial distribution of sediments and the contents of inorganic phosphorus in pumped storage reservoirs were studied. According to the particle size fractions of surface sediments, the sediment far from the zone of inputting water was light loam, and that in the middle zone of the reservoirs was light clay, while those in the zone of inputting water and outputting water were heavy loam. Along the distance from the zone of water inputting to the tail of the reservoir, the TP content decreased obviously. Among the inorganic phosphorus in sediments, the content of O-P averaged highest, the Fe-P was the second, then Ca-P, Al-P. Though there were very differences in the pattern and location of water inlet and outlet between a pumped storage reservoir and a typical reservoir, the distribution of sediments and their inorganic phosphorus were consisted with hydrodynamics in the reservoir. There was a significant spatial difference in five kinds of inorganic phosphorus, especially in the active ones, Fe-P and Al-P, which might contribute to their activities.