中文摘要：

多泥沙水体的水质监测和评价一直是人们关注的重点。文中对渭河临潼水文站采集的洪水期和非洪水期含泥沙水样分别进行不同保存和预处理情况下的水质分析，结果表明：原状水COD、TN和TP随水体含沙量的增大呈显著上升趋势，上清液和过滤液COD、TN和TP随水体含沙量的增大呈微下降趋势。保存方法对原状水监测值影响较大，其影响随含沙量的增大逐渐增大；对上清液和过滤液影响较小，其影响随含沙量的增大逐渐降低。提出原状水水质监测值可作为水体中污染物总量和非点源负荷总量的计算依据；上清液水质监测值可作为水质评价以及水污染控制中水体中有效污染物总量和有效非点源负荷总量的计算依据。过滤液监测值可作为水体中溶解性污染物负荷总量的计算及其水质评价的依据。最后对各场洪水污染负荷总量和非点源污染负荷总量进行了实例计算。

英文摘要：

Water quality monitoring and evaluation of water sample from sediment - laden stream has been paid more attention ever since. Water samples sediment -laden of flood and non -flood period collected from Lin - tong hydrometric station of the Weihe River were respectively analyzed under different conservation and pretreatment methods. The results showed that： COD,TN and TP concentration in raw water was evidently getting higher along with the increase of sediment concentration, while which was with slight going down along with the increase of sediment concentration in clarified water and filtered water. Conservation methods had big effects on raw water, and the effect was getting higher along with the increase of sediment concentration. Conservation methods had a small effect on clarified water and filtered water, and the effect was with slight going down along with the increase of sediment concentration. The monitoring value of raw water can be used to calculate the total quantity of all pollutants and non - point source pollution（NSP） load. The monitoring value in clarified water ean be used to judge water quality and estimate effective total quantity of pollutants and NSP load. The monitoring value in filtered water can be used to estimate total dissolved pollutants quantity and evaluate its water quality. Finally, total quantity of pollutants and NSP load of every flood were estimated.