阳宗海南岸流域农村及农业面源对水体磷污染的贡献

Contribution of Rural and Agricultural Sources to Aquatic Phosphor Load in South of Yangzong River Basin

基于遥感解译、野外监测等手段,对阳宗海南岸不同土地利用类型下的种植业、农村生活以及畜禽养殖业进行磷污染负荷核算。结果表明:该流域磷污染负荷总量为34.53 t,畜禽养殖和农村生活是阳宗海南岸流域磷污染的主要来源。其中畜禽养殖排放量最大,为22.32 t,占整个流域磷污染负荷的65%;农村生活磷污染负荷量主要集中在新街村委会,总磷(TP)排放量为8.62 t,占整个流域磷污染负荷的25%;种植业总磷(TP)排放量最小,占总负荷的10%,且主要来源于旱地。针对阳宗海南岸流域磷输出量污染的治理,需要考虑种植业和农村生活中磷的排放,尤其应把畜禽养殖污染作为重点研究对象,并制定相应的控制措施。

The phosphorus pollution load of plantings under different land use types, sewage and livestock industry in South of Yangzong River Basin were calculated based on remote sensing interpretation and field monitoring. The results showed that the total load of phosphorus pollution in the watershed was 34.53 t, livestock and rural life were the main source of phosphorus pollution in south of Yangzong River Basin, where livestock emissions was the maximum, 22.32 t, accounting for 65% of phosphorus pollution load in the entire basin. phosphorus pollution load of rural life was mainly in the new village street, TP emissions was 8.62 t, accounting for 25% of the phosphorus pollution load in the entire river basin. The TP emissions of farming were minimal, mainly from the paddy fields, accounting for 10% of the total load. Therefore, for the pollution control of phosphorus output in South of Yangzong River Basin, we need to consider the farming and rural life in phosphorus emissions, especially the livestock pollution which regarded as the focus of the study, and to develop appropriate control measures.