基于水土评价工具的水质建模——以拉瓦尔流域为例

Tayyaba Qayyum, A. Shakoor
{"title":"基于水土评价工具的水质建模——以拉瓦尔流域为例","authors":"Tayyaba Qayyum, A. Shakoor","doi":"10.57041/pjosr.v2i1.20","DOIUrl":null,"url":null,"abstract":"The water quality of Rawal watershed has been highly deteriorated because of increased concentration of organic nitrogen and phosphorous coming from non-point sources causing eutrophication. The main objective of this study was to use a watershed scale model SWAT (Soil & Water Assessment Tool) as a modeling tool for predicting the impact of the Land Use change on water quality of Rawal Lake. Specific objectives were to (a)develop pollution source inventory mapping(b) quantify the pollutant load (organic nitrogen and phosphorus) with respect to Land Use change that causes eutrophication and (c) model the alternative Best Management Practices (BMP’s) and evaluate their effectiveness. In the pre field phase the collection and preprocessing of data (DEM & Landsat images (30m resolution)) was done. Land Use (2001 & 2010) classification was done using Landsat imagery in ArcGIS. For the pollution source inventory, mapping the study area was surveyed. In the post field phase the model was calibrated (2002-2006) by using the observed and simulated surface runoff data and then validated (2007-2010) .The, model’s accuracy was further verified by using R2 and Nash Sutcliffe Efficiency (NSE). SWAT simulations resulted in 392.40 % and 391.72 % increase in the quantity of organic nitrogen and phosphorus with respect to Land Use change (2001 & 2010). By the application of BMP’s such as   filter strips, the average reduction in the concentration of N could be 75.155% while that of P could be 96.93%, similarly by the application of terracing the average reduction in the concentration of N could be 52.73% while that of P could be 94.18% in the selected sub basins. By the application of contouring the average reduction of 35.64% for N and 92.09% for P could be achieved. This study would provide decision maker a source of information on most feasible and cost effective BMP’s.","PeriodicalId":19924,"journal":{"name":"Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences","volume":"27 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Water Quality Modeling Using Soil and Water Assessment Tool: A Case Study of Rawal Watershed\",\"authors\":\"Tayyaba Qayyum, A. Shakoor\",\"doi\":\"10.57041/pjosr.v2i1.20\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The water quality of Rawal watershed has been highly deteriorated because of increased concentration of organic nitrogen and phosphorous coming from non-point sources causing eutrophication. The main objective of this study was to use a watershed scale model SWAT (Soil & Water Assessment Tool) as a modeling tool for predicting the impact of the Land Use change on water quality of Rawal Lake. Specific objectives were to (a)develop pollution source inventory mapping(b) quantify the pollutant load (organic nitrogen and phosphorus) with respect to Land Use change that causes eutrophication and (c) model the alternative Best Management Practices (BMP’s) and evaluate their effectiveness. In the pre field phase the collection and preprocessing of data (DEM & Landsat images (30m resolution)) was done. Land Use (2001 & 2010) classification was done using Landsat imagery in ArcGIS. For the pollution source inventory, mapping the study area was surveyed. In the post field phase the model was calibrated (2002-2006) by using the observed and simulated surface runoff data and then validated (2007-2010) .The, model’s accuracy was further verified by using R2 and Nash Sutcliffe Efficiency (NSE). SWAT simulations resulted in 392.40 % and 391.72 % increase in the quantity of organic nitrogen and phosphorus with respect to Land Use change (2001 & 2010). By the application of BMP’s such as   filter strips, the average reduction in the concentration of N could be 75.155% while that of P could be 96.93%, similarly by the application of terracing the average reduction in the concentration of N could be 52.73% while that of P could be 94.18% in the selected sub basins. By the application of contouring the average reduction of 35.64% for N and 92.09% for P could be achieved. This study would provide decision maker a source of information on most feasible and cost effective BMP’s.\",\"PeriodicalId\":19924,\"journal\":{\"name\":\"Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences\",\"volume\":\"27 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-06-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.57041/pjosr.v2i1.20\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Pakistan Journal of Scientific & Industrial Research Series A: Physical Sciences","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.57041/pjosr.v2i1.20","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0

摘要

由于非点源的有机氮和磷浓度增加,导致富营养化,拉瓦尔流域水质严重恶化。本研究的主要目的是利用流域尺度模型SWAT (Soil & Water Assessment Tool)作为模型工具,预测土地利用变化对拉瓦尔湖水质的影响。具体目标是:(a)制定污染源清单地图;(b)量化导致富营养化的土地利用变化的污染物负荷(有机氮和磷);(c)模拟备选最佳管理做法(BMP)并评估其有效性。在野外前期,对数据(DEM和Landsat图像(30m分辨率))进行了采集和预处理。土地利用(2001年和2010年)分类使用ArcGIS中的Landsat图像完成。在污染源清查方面,对研究区域进行了测绘。在后野外阶段,利用观测和模拟的地表径流数据对模型进行了校正(2002-2006年),然后对模型进行了验证(2007-2010年),并利用R2和Nash Sutcliffe效率(NSE)进一步验证了模型的准确性。SWAT模拟结果显示,相对于土地利用变化,有机氮和磷的数量分别增加了392.40%和391.72%(2001年和2010年)。在选择的子盆地中,采用过滤带等BMP处理,氮的平均降幅为75.155%,磷的平均降幅为96.93%;采用梯田处理,氮的平均降幅为52.73%,磷的平均降幅为94.18%。采用等高线处理,氮素平均降低35.64%,磷平均降低92.09%。这项研究将为决策者提供最可行和最具成本效益的BMP的信息来源。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
查看原文
分享 分享
微信好友 朋友圈 QQ好友 复制链接
本刊更多论文
Water Quality Modeling Using Soil and Water Assessment Tool: A Case Study of Rawal Watershed
The water quality of Rawal watershed has been highly deteriorated because of increased concentration of organic nitrogen and phosphorous coming from non-point sources causing eutrophication. The main objective of this study was to use a watershed scale model SWAT (Soil & Water Assessment Tool) as a modeling tool for predicting the impact of the Land Use change on water quality of Rawal Lake. Specific objectives were to (a)develop pollution source inventory mapping(b) quantify the pollutant load (organic nitrogen and phosphorus) with respect to Land Use change that causes eutrophication and (c) model the alternative Best Management Practices (BMP’s) and evaluate their effectiveness. In the pre field phase the collection and preprocessing of data (DEM & Landsat images (30m resolution)) was done. Land Use (2001 & 2010) classification was done using Landsat imagery in ArcGIS. For the pollution source inventory, mapping the study area was surveyed. In the post field phase the model was calibrated (2002-2006) by using the observed and simulated surface runoff data and then validated (2007-2010) .The, model’s accuracy was further verified by using R2 and Nash Sutcliffe Efficiency (NSE). SWAT simulations resulted in 392.40 % and 391.72 % increase in the quantity of organic nitrogen and phosphorus with respect to Land Use change (2001 & 2010). By the application of BMP’s such as   filter strips, the average reduction in the concentration of N could be 75.155% while that of P could be 96.93%, similarly by the application of terracing the average reduction in the concentration of N could be 52.73% while that of P could be 94.18% in the selected sub basins. By the application of contouring the average reduction of 35.64% for N and 92.09% for P could be achieved. This study would provide decision maker a source of information on most feasible and cost effective BMP’s.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
自引率
0.00%
发文量
0
期刊最新文献
Durability Studies on High Strength Concrete Health Monitoring and Breathing Support System Water Quality Modeling Using Soil and Water Assessment Tool: A Case Study of Rawal Watershed Design and Analysis of Wave Energy Converter Technologies Analysis of Vulnerabilities in System by Penetration Testing
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
已复制链接
已复制链接
快去分享给好友吧!
我知道了
×
扫码分享
扫码分享
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1