漓江典型小流域农田面源污染治理技术及应用

发布时间：2018-05-24 22:24

本文选题：漓江流域 + 农田面源污染　；参考：《水电能源科学》2017年09期

【摘要】：针对漓江流域农业面源污染日益突出,提出了包含源头减量的田间水肥管理模式、生态沟渠过程阻拦、湿地营养物质再利用及生态骨干沟渠植物修复"四道防线"的面源污染综合治理体系,并以漓江支流桃花江流域的定江镇苔塘村典型小流域为例,综合评价了2014~2016年期间农田排水经过"四道防线"后污染物的削减率。结果表明,源头减量中,节水减排综合调控技术灌溉效果最佳;农田排水经过源头减量、过程拦截、养分再利用、生态修复"四道防线"处理后,水体中总氮、氨氮、硝氮、总磷的综合削减率分别达到78.44%、55.20%、74.54%、75.72%,大大缓解了漓江流域的农业面源污染现状。研究结果可为类似典型小流域的农田面源污染的治理提供借鉴。
[Abstract]:In view of the increasingly prominent agricultural non-point source pollution in the Lijiang River Basin, a field water and fertilizer management model containing source reduction was proposed, which was blocked by the ecological ditch process. Wetland nutrient reuse and ecological backbone canals plant restoration of "four lines of defense" comprehensive control system of non-point source pollution, and the Lijiang tributaries Taohuajiang River Valley Dingjiang Town Taitang Village typical small watershed as an example. The reduction rate of pollutants in farmland drainage after "four lines of defense" in 2014-2016 was comprehensively evaluated. The results showed that water saving and emission reduction integrated control technology had the best effect on irrigation, and farmland drainage was treated with total nitrogen, ammonia nitrogen, nitrate nitrogen after the treatment of source reduction, process interception, nutrient reuse, ecological restoration "four lines of defense". The comprehensive reduction rate of total phosphorus reached 78.44% and 55.20% respectively, which greatly alleviated the current situation of agricultural non-point source pollution in Lijiang River basin. The results can be used for reference for the treatment of farmland non-point source pollution similar to typical small watershed.
【作者单位】：广西农业灌溉排水工程技术研究中心;广西壮族自治区灌溉试验中心站;
【基金】：水利部公益行业专项项目(201401057) 桂林市科学研究与技术开发计划课题(201603013231)
【分类号】：X52;X71

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