ZHANG Yani,LI Zeli,DENG Xiaowen,et al.Simulation and Source Apportionment of Nonpoint Source Dissolved Nitrogen Load in Shahe Watershed[J].Research of Soil and Water Conservation,2017,24(05):352-356.
沙河流域非点源溶解态氮负荷模拟及源解析
- Title:
- Simulation and Source Apportionment of Nonpoint Source Dissolved Nitrogen Load in Shahe Watershed
- Keywords:
- Shahe Watershed; GWLF; nonpoint source; dissolved nitrogen; source apportionment of pollution
- 分类号:
- X522
- 摘要:
- 利用通用流域负荷模型（GWLF）对沙河流域2006—2012年的溶解态氮（DN）负荷进行了定量分析和来源解析，并基于模型分析了各污染源的季节性差异。模型在沙河流域适用性良好，月径流和DN负荷在校准期和验证期的ENS和R2都大于0.6，模型具备可靠的模拟能力。模拟结果表明，沙河流域DN年均负荷以非点源污染为主，占总污染负荷的82.7%。在所有土地利用类型中，耕地的DN负荷贡献率最大（64.5%），表明人类影响下的农业生产活动是流域非点源污染最主要的来源。同时，沙河流域DN负荷污染源组成表现出明显的季节性差异，丰水期地表径流是最主要的污染源（47.0%），而枯水期农村生活污染源（45.0%）和点源（23.1%）贡献相对显著。因此，在制定负荷削减方案时，应考虑氮污染源的季节性。
- Abstract:
- Generalized Watershed Loading Functions (GWLF) was employed to estimate dissolved nitrogen (DN) load and perform source apportionment in Shahe Watershed from 2006 to 2012. The seasonal variation of pollution source was also analyzed based on model results. Satisfactory performance of GWLF was revealed by the ENS and R2 of greater than 0.6 in calibrating and validating streamflow and DN. The result indicated that the nonpoint source pollution had the highest ratio of the annual average DN load， accounting for 81.6%. Among all the land uses, farmlands contributed most to DN load in Shahe watershed, indicating that agricultural activities dominated by human were the major contributor of nonpoint source pollution. Besides, seasonal differences of the contribution ratio from DN pollution source were significant. Runoff was the major pollution source in the wet season; however, septic system and point source were more significant in the dry season. In order to efficiently reduce and control nitrogen pollution in Shahe Watershed, it is necessary to consider the difference of pollution source constitution between wet season and dry season with respect to the formulation of pollution reduction plan and control measure preference.
参考文献/References:
[1] Leigh C, Burford M A, Roberts D T, et al. Predicting the vulnerability of reservoirs to poor water quality and cyanobacterial blooms[J]. Water Research, 2010,44(15):4487-4496.
[2] 马放,姜晓峰,王立,等.基于SWAT模型的阿什河流域非点源污染控制措施[J].中国环境科学,2016,36(2):610-618.
[3] 李翠梅,张绍广,姚文平,等.太湖流域苏州片区农业面源污染负荷研究[J].水土保持研究,2016,23(3):354-359.
[4] 钟科元,陈莹,陈兴伟,等.基于农业非点源污染模型的桃溪流域日径流泥沙模拟[J].水土保持通报,2015,35(6):130-134.
[5] 宋林旭,刘德富,崔玉洁,等.三峡库区香溪河流域非点源氮磷负荷分布规律研究[J].环境科学学报,2016,36(2):428-434.
[6] 陈海洋,滕彦国,王金生,等.晋江流域非点源氮磷及污染源解析[J].农业工程学报，2012,28(5):213-219.
[7] 梁钊雄,王兮之,王军. SWAT模型在粤北连江流域的应用研究[J].水土保持研究,2013,20(6):140-144.
[8] 王慧亮,孙志琢,李叙勇,等.非点源污染负荷模型的比较与选择[J].境科学与技术,2013,36(5):176-182.
[9] Ongley E D, Zhang X L, Yu T. Current status of agricultural and rural non-point source pollution assessment in China[J]. Environmental Pollution, 2010,158(5):1159-1168.
[10] Chen H, Teng Y, Wang J. Load estimation and source apportionment of nonpoint source nitrogen and phosphorus based on integrated application of SLURP model, ECM, and RUSLE:a case study in the Jinjiang River, China[J]. Environmental Monitoring and Assessment, 2013,185(2):2009-2021.
[11] 刘瑞民,杨志峰,丁晓雯,等.土地利用/覆盖变化对长江上游非点源污染影响研究[J].环境科学,2006,27(12):2407-2414.
[12] 李明涛.流域非点源污染模型的比较与不确定性分析[D].北京:首都师范大学,2011.
[13] Ning S K, Jeng K Y, Chang N B. Evaluation of non-point sources pollution impacts by integrated 3S information technologies and GWLF modeling[J]. Water Science & Technology, 2002,46(6/7):217-224.
[14] 何因,秦保平,李云生,等.GWLF模型的原理、结构及应用[J].城市环境与城市生态,2009(6):24-27.
[15] Lee K Y, Fisher T R, Rochelle N E. Modeling the hydrochemistry of the Choptank River basin using GWLF and Arc/Info:2. Model validation and application[J]. Biogeochemistry, 2001,56(3):311-348.
[16] Li X Y, Weleer D E, Jordan T E. Watershed model calibration using multi-objective optimization and multi-site averaging[J]. Journal of Hydrology, 2010,380(3):277-288.
[17] Wu W, Hall C A, Scaten F N. Modelling the impact of recent land-cover changes on the 25 stream flows in north-eastern Pueto Rico[J]. Hydrological Processes, 2007,21(21):2944-2956.
[18] Cohn T A, Caulder D L, Gilroy E J, et al. The validity of a simple statistical model for estimating fluvial constituent loads:An empirical study involving nutrient loads entering Chesapeake Bay[J]. Water Resources Research, 1992,28(9):2353-2363.
[19] Sheeder S A, Evans B M. Estimating nutrient and sediment threshold criteria for biological impairment in pennsylvania watersheds[J]. Journal of the American Water Resources Association, 2004,40(4):881-888.
[20] 朱继业,高超,朱建国.不同农地利用方式下地表径流中氮的输出特征[J].南京大学学报:自然科学版,2007,42(6):621-627.
备注/Memo
收稿日期:2016-09-06;改回日期:2016-10-11。
基金项目:国家水体污染控制与治理科技重大专项跨省重点流域生态补偿与经济责任机制示范研究课题（2013ZX07603-003-006）
作者简介:张亚尼(1990-),女,山西泽州人,硕士研究生,从事环境污染与防治研究。E-mail:zhang_yani000@163.com
通讯作者:邓小文(1976-),男,山西长治人,正高级工程师,从事生态修复方面研究。E-mail:dxwpp@163.com