山东省南四湖流域农业面源污染状况分析

以探明山东省南四湖流域农业面源污染状况为目的,在对流域内农村人口、畜禽养殖规模、农田施肥量、水产品产量等数据调查的基础上,结合全国第一次农业污染源调查结果中的农业源产、排污系数,测算出2009年山东省南四湖流域内农村生活、农田化肥、畜禽养殖业、水产养殖业等4个方面COD_Cr、TN、TP的排放总量分别为192 278.71、103 126.04、6 990.82 t. 通过分析得出,在山东省南四湖流域农业面源污染中的COD_Cr主要来自农村生活,占COD_Cr排放总量的56.44%；农田化肥TN的流失占TN排放总量的48.37%,农村生活和畜禽养殖对TN排放总量也有较高的贡献；畜禽养殖业是TP的主要来源,占TP排放总量的65.06%；水产养殖对各项污染物的贡献率相对较低,但不容忽视. 

Survey and Analysis of Agricultural Non-Point Source Pollution in Nansi Lake Basin, Shandong Province

Based on investigations of rural population, size of livestock, amount of farm fertilizer and aquatic products, and pollution coefficients of production and emissions from the first China Pollution Source Census, the current status of water pollution from agricultural non-point sources in Nansi Lake basin in Shandong Province was estimated for 2009. The results showed that the total amounts of COD_Cr, TN and TP discharged from rural life, farm fertilizer, livestock and aquiculture were 192,278.71, 103,126.04 and 6,990.82 t, respectively in Nansi Lake basin. COD_Cr was mainly from rural life, which accounted for 56.44% of total COD_Cr. TN was mainly from agricultural fertilizers, which accounted for 48.37% of total TN pollution. Rural life and livestock were also big contributors to TN pollution. Livestock was a major source of TP, accounting for 65.06% of the total TP pollution. The pollution from aquaculture was relatively low, but its effects should not be ignored.