合肥市环巢湖地区种植业面源污染监测与评价

通过2016-2018年在合肥市环巢湖5个县区主要农田周边沟渠中采集水样,监测农田氮磷流失浓度,并评价该区域种植业面源污染状况。结果表明,这3年该区域种植业TN、TP流失的平均质量浓度分别为3.48 mg/L、0.602 mg/L,均高于地表水Ⅴ类水质标准。2016年与2017年TN、TP浓度差异不大,2018年较前两年TN浓度有所提高,TP浓度相比显著降低。巢湖市农田沟渠水中TP浓度高于其他县区,TN浓度相对较低;NO-3 N浓度庐江县高于其他县区;NH 3 N地区间几乎没有差异。TP和NH 3 N浓度均为秋季高于夏季,TN和NO-3 N浓度均为夏季高于秋季。

Monitoring and Evaluation of Non point Source Pollution of Planting Industry in Chaohu Lake Area of Hefei

From 2016 to 2018,water samples were collected from the main farmland ditches in five counties in Chaohu Lake area of Hefei for monitoring nitrogen and phosphorus loss from the farmland,and evaluating non-point source pollution of planting industry in the region.Results showed that in the 3 years,the average mass concentration of TN and TP loss in planting industry in this region were 3.48 mg/L and 0.602 mg/L,respectively,both were above surface water quality standards ofⅤgrade.There was little difference in TN and TP concentrations between 2016 and 2017.Compared the previous two years,TN concentration increased and TP concentration decreased significantly in 2018.TP concentration in the farmland ditches in Chaohu was higher than that in other counties,and TN concentration was relatively low.The concentration of NO-3 N in Lujiang County was higher than that in other counties.There was little difference in NH 3 N concentration between regions.The concentration of TP and NH 3 N were higher in autumn than that in summer,and the concentration of TN and NO-3 N were higher in summer than that in autumn.