河道入湖污染物量计算精度分析

Calculation precision of pollutant load of rivers

入湖污染物量计算精度的高低决定入湖污染物量分析结果的客观性和准确性.本文以太湖为例,分析2010年环太湖河道入湖污染物量、时空分布情况及多年环太湖河道入湖染污物量变化情势.在此基础上,使用现在已有监测条件分析时段内每日水量水质监测数据计算逐日入湖污染物量时段累积值,并以此作为现有分析计算河道入湖污染物量的最高计算精度值.通过设定不同监测方案、采用不同计算方法分析河道入湖污染物量及其计算精度,认为现有分析计算的河道入湖污染物量已是每日河道水量水质同步监测下河道入湖污染物量的80%左右.针对河道入湖污染物量计算精度的分析可为制定科学的河道入湖污染量监测方案、提高河道入湖污染物量计算精度提供技术支撑.

The objectivity and accuracy of the analysis results of pollutant load into the Lake Taihu are controlled by the calculation precision. The paper takes Lake Taihu as an example, analyses not only pollutant load of rivers into Lake Taihu in 2010, but also the temporal and spatial distributions and variation of the pollutant load. The daily monitoring data of water yield and water quality under the existing monitoring network are used to calculate pollutant load into the Lake Taihu in a daily accumulation period, which is assumed the highest calculation precision for existing analysis and calculation of pollutant load of rivers into the Lake Taihu. With different monitoring schemes and different calculation methods, the study analysed pollutant load of rivers into the Lake Taihu and the calculation precision achieved. It is found that pollutant load of rivers into the lake analysed and calculated nowadays ac- counts for 80 percents of which monitored everyday simultaneously. Technical support is provided by analysing the calculation pre- cision of pollutant load of rivers into the Lake Taihu to make scientific monitoring schemes and to improve the computation precision of the pollutant load of rivers into the Lake Taihu.