稻田与明沟湿地协同系统对氮磷污染的削减效果.docVIP

 稻田与明沟湿地协同系统对氮磷污染的削 减效果# 彭世彰1，熊玉江1，罗玉峰1，杨士红1，闫欣1，刘静1,2** 5 10 15 20 25 30 35 40 （1. 河海大学水文水资源与水利工程科学国家重点实验室，南京 210098； 2. 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室，北京 100038） 摘要：农田排水中氮磷流失造成了水体富营养化及面源污染等一系列水环境问题。本文提出 了控制农田面源污染的稻田沟塘湿地协同系统(PODWS)，研究了该系统及其各组成部分对 农田排水中氮磷削减效果及机理。结果表明：PODWS 可有效地减少稻田排水量，降低稻田 排水中氮磷浓度，对稻田排水中氮磷的实现原位削减。PODWS 较常规灌排系统减少系统排 水量 73.02%，系统出口总氮（TN）和总磷（TP）浓度分别降低 63.54%和 26.67%，TN 和 TP 流失负荷分别减少 90.07%和 80.14%。本文研究结果可为 PODWS 在我国的应用提供理 论支持及实践指导。 关键词：水资源保护；稻田；控制灌溉；控制排水；湿地；氮；磷 中图分类号：X592；S276 The Effect of Paddy Field Open-Ditch and Wetland System on Nitrogen and Phosphorus Pollutants Reduction in Paddy Fields PENG Shizhang1, XIONG Yujiang1, LUO Yufeng1, YANG Shihong1, YAN Xin1, LIU Jing1,2 (1. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098; 2. State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute Water Resources and Hydropower Research, Beijing 100038) Abstract: A series of water environment problems as water eutrophication and non-point pollution are caused by nitrogen and phosphorus loss in farmland drainage. This paper presents a system of water comprehensive management to control agricultural non-point source pollution, which is called Paddy Open Ditch and Wetland System(PODWS）. It investigates the mechanism and subtractive effect of the system on nitrogen and phosphorus loss in farmland drainage. It indicated that PODWS could effectively decrease the paddy field drainage and concentration of nitrogen and phosphorus in the drainage that realizes nitrogen and phosphorus pollutants reduction in paddy fields. The drainage of PODWS is 73.02% less than the traditional irrigation and drainage (TID) system. The concentrations of total nitrogen(TN) and phosphorus(TP) in the outlet of PODWS are 63.54% and 26.67% less than TID system.The TN and TP loads of PODWS are 90.07% and 80.14% less than TID system. This research results could provide theoretical support and p