天然洪水养分与泥沙之间的关系研究

Study on the Relation Between Nutrient and Sediment of Natural Floods

以2004年大同市御河干渠两场洪水为研究对象,对其流量、含沙量、养分(包括有机质,氮,磷,钾)做了测定和比较,研究结果表明:洪水中下层泥沙中的养分含量远大于上清液中的养分含量;洪水中整体养分含量随着含沙量的增大而增大,并且养分含量和含沙量呈近似线性关系。通过对洪水中下层泥沙做颗粒级配分析,推断出这种结果主要是由洪水养分成因及洪水中下层泥沙粒径特性决定的。这一研究成果对引洪补源的可行性论证提供了重要依据。

Towards the research on two flood water of Yuhe river in Datong city during 2004, by measuring and comparing their discharge, sediment concentration , nutrient include organic, phosphorus, , potassium, azote, the result shows that the nutrient content of the sediment is greatly larger than that of supernatant fluid. The toatl nutrient of floods increases as the sediment concentration increases, and there is nearly a linear relationship between them, By analysing the particle size of the sediment, we can conclude that the reason of the liner relationship is the resourse of flood nutrient and the sediment nature. So that, the result offer impotant reference to the feasibility of the project of ＂making floods be the resouse of groundwater＂.