曲靖阿岗水库径流区农业面源污染负荷分析及评价

Analysis and Evaluation of Agriculture Non-point Source Pollution in the Agang Reservoir Basin,Qujing

以区域水环境保护为出发点,把曲靖阿岗水库坝址以上径流区作为研究范围,通过调查了解研究范围内的农业面源污染情况,核算了农业面源污染负荷,并利用等标污染负荷法对农业面源污染进行了分析与评价。结果表明,2013年阿岗水库坝址以上径流区的农业面源污染物COD、TN、TP和NH3-N的入库量分别为1693.67t/a、186.62t/a、41.57t/a和90.37t/a。东山镇和阿岗镇的等标污染指数最高,分别为12.97和11.96,对水库水体存在污染。农业面源污染的主要污染来源是人畜粪便污染,等标污染负荷比达到54.28%,主要污染物是TP和TN,等标污染负荷比分别为43.38%和38.95%,磷污染应该受到重视。

In order to understand the amount of agriculture non - point source pollution in the Agang reservoir basin, the basin above the dam was taken as the research target. The agriculture non - point source pollution loads were estimated by investigating agricultural production activities. In addition, the agriculture non - point source pollution was evaluated using the equal standard pollution method. The results showed that the amounts of total nitrogen （TN）, total phosphorus （TP） , chemical oxygen demand （COD） and ammonia nitrogen （NH3 -N） from the target research area were 21693.67t/a, 186. 62t/a, 41.57t/a and standard pollution indices of Dongshan and Agang Town contributed the 90. 37t/a, respectively. The water equal most, which were12. 97 and 11.96. The primary pollution source of agriculture non - point source pollution was human and animal manure. Its equivalent standard pollution index accounted for 54. 28%. The main pollutants were TP and TN. Their load rations in equivalent standard were 43.38% and 38.95%, respectively. Phosphorus pollution should be paid much more attention.