摘要
渭河是一条多沙河流,年输沙量5.2×108t,占黄河的31.9%。随着泥沙的冲淤,也带来了污染物的迁移。洪水时,沉积的泥沙被冲刷,形成了二次污染。二次污染是重金属和有毒物的释放过程,增加了耗氧量,关系到下游饮用水的安全和水生生物的生命问题。
Weihe River is a siltladen river, whose annual sediment transportation is 5.2 × 10^8 tons, making up 31.3 % of the silt of Yellow River. With scouring and silting of the silt, the migration of the pollutant has been brought too. At flood period, the secondary pollution is brought by scouring. The oxygen consumption is increased in the release course of the heavy metal and toxicant. This concerns the security of the drinking water and the life of the aquatic organism in downstream.
出处
《水利与建筑工程学报》
2007年第2期1-4,21,共5页
Journal of Water Resources and Architectural Engineering
基金
国家自然科学基金和黄河水利委员会黄河研究基金联合资助项目(50279042)
高等学校博士点基金资助项目(20030712007)
关键词
泥沙
污染
渭河
silt
pollution
Weihe River
