长江流域资源与环境 >> 2013, Vol. 21 >> Issue (Z): 56-.

• 生态环境 • 上一篇    下一篇

平原水网圩区非点源污染模拟分析及最佳管理措施研究

孙金华| 朱乾德| 练湘津| 秦飞| 陈成   

  1. (1.南京水利科学研究院水文水资源与水利工程科学国家重点实验室|江苏 南京 210029;
    2.水利部水资源司|北京 100053; 3.黄河流域水资源保护局| 河南 郑州 450003)
  • 出版日期:2013-09-20

STIMULATION ANALYSIS AND BEST MANAGEMENT PRACTICES FOR NONPOINT SOURCE POLLUTION IN POLDER AREA OF WATER NET PLAIN

SUN Jinhua1, ZHU Qiande1, LIAN Xiangjin2, QIN Fei3, CHEN Cheng1   

  1. (1.State Key Laboratory of Hydrology and Water Resources and Hydraulic Engineering Science,Nanjing Hydraulic Research Institute,Nanjing 210029,China|2.Ministry of Water Resources of the PRC,Beijing 100053,China|3.Yellow River Basin Water Resources Protection Bureau,Zhengzhou 450003,China
  • Online:2013-09-20

摘要:

平原水网区太湖流域非点源污染所占比例越来越重,非点源污染不确定性致使难以准确分析其流失规律。利用经率定验证的非点源污染模型AnnAGNPS模拟太湖流域雪堰镇平原水网圩区全年及各月非点源污染氮磷流失负荷,分析氮磷负荷时空分布规律,识别污染关键源区,通过对模型参数进行敏感性分析,定量评价最佳管理措施氮磷防控效果。结果表明,雪堰镇非点源污染氮磷负荷分别为6299 t/a、581 t/a,流失高峰期在夏季。氮磷流失主要集中在坡耕地区和河道两侧,氮在施肥量大的地区也有大量流失。4种管理措施中,等高耕作、保护性耕作对颗粒态氮、磷削减效果明显,生态缓冲区、减少施肥量对氮削减效果明显

Abstract:

The nonpoint source pollution has been growing to large proportion in the Taihu Lake Basin in water net plain.It was difficult to study the law of nitrogen and phosphorus loss due to their complicated characteristic.The calibrated and verificated AnnAGNPS model was applied to simulate the load of nitrogen and phosphorus from nonpoint source pollution monthly and yearly in the Taihu Lake Basin in polder area of water net plain.And then  their temporal and spatial distribution were analyzed,critical source areas were identified and the effects of best management practices to control the nitrogen and phosphorus pollution based on sensitivity analysis were evaluated.The results showed that the nitrogen and phosphorus load were 6299 t/a and 581 t/a,respectively,both with loss peaks in the summer.The loss of nitrogen and phosphorus mostly happened on slopping field and banks of river.Besides,highly fertilized areas had high nitrogen loss.Thus,it was reasonable to select the appropriate best management practices according to practical condition

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