底泥营养盐的释磷对富营养化湖泊的影响

富营养化是中国湖泊的重大环境问题。当湖泊的污染外源受到控制以后，由于沉积物（底泥）中营养盐内负荷的存在和释放，湖泊仍然可以发生富营养化。底泥营养盐就成为湖泊富营养化的主导因子，特别是溶解态的磷会逐步释放，成为水体富营养化的主导因子。沉积物中磷的循环在一定程度上决定着富营养化的进程，对水体磷含量有深刻的影响。结合国内外研究动态，对底泥磷形态、磷释放与水体水质的关系作了概述，并对底泥磷释放的研究方向以及控制湖泊富营养化发表了一些见解。

Effects of Internal Pollution Sources on the Eutrophic Lake

Eutrophication of lakes becomes a serious environmental problem in China, and pollution sources include internal and external sources. When the external pollution sources of lake are controlled ,eutrophication may still happen due to the existence and release of inner loadingnutrients in sediment. Then nutrients in sediment becomes the leading factor of the lake eutrophication. This paper mainly analyzes the effect of internal pollution sources on the eutrophication, and puts forward some primary countermeasures.