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Optimizing Non-Point Source Pollution Management: Evaluating Cost-Effective Strategies in a Small Watershed within the Three Gorges Reservoir Area, China

文献类型：期刊论文

作者Chang, Renfang5; Wang, Yunqi5; Liu, Huifang1; Wang, Zhen4; Ma, Lei3; Zhang, Jiancong5; Li, Junjie5; Yan, Zhiyi5; Zhang, Yihui2; Li, Danqing5
刊名LAND
出版日期2024-06-01
卷号13期号:6页码:21
关键词best management practices SWAT model driving factors entropy weight method cost-effectiveness analysis
DOI10.3390/land13060742
英文摘要Non-point source (NPS) pollution poses a significant threat to the water environment, yet controlling it at the watershed scale remains a formidable challenge. Understanding the characteristics and drivers of nitrogen (N) and phosphorus (P) outputs at the watershed scale, along with identifying cost-effective best management practices (BMPs), is crucial for effective pollution control. In this study, we utilized the Wangjiaqiao watershed within the Three Gorges Reservoir Area (TGRA) as a case study to explore the characteristics of N and P load outputs and their dominant drivers by combining the SWAT model and a geographic detector. Based on our analysis of N and P loads within the watershed, we employed the entropy weight method to evaluate the reduction efficiency and cost-effectiveness of 64 BMP scenarios, encompassing seven measures (vegetative filter strips, parallel terraces, 10% fertilizer reduction, 30% fertilizer reduction, residue cover tillage, grass mulching, and returning farmland to forest) and their combinations. Our findings revealed the following: (1) spatial heterogeneity in NPS loads within the watershed, primarily influenced by land use, fertilizer application, and surface runoff, with interactive enhancement effects among driving factors; (2) the differential effectiveness of BMPs at the watershed level, with structural measures, particularly terracing, exhibiting higher efficacy and achieving reduction rates of 28.12% for total nitrogen (TN) and 37.69% for total phosphorus (TP); the combined BMPs showed improved reduction efficiency, but not merely additive; and (3) in terms of cost-effectiveness, 30% fertilizer reduction emerged as the most beneficial among the individual measures. Moreover, a combination of vegetative filter strips, parallel terraces, and 30% fertilizer reduction demonstrated significant improvements in TN and TP reductions (48.05% and 61.95%, respectively), suggesting their widespread applicability. Overall, our study provides insights into developing a cost-effective BMP strategy for the Wangjiaqiao watershed and offers valuable guidance for NPS pollution management in similar small watersheds within the TGRA.
WOS关键词RIVER-BASIN ; AGRICULTURAL CONSERVATION ; NITROGEN ; PATTERNS ; LOSSES ; RUNOFF ; QUANTIFICATION ; SIMULATION ; ACCURACY ; QUALITY
资助项目Chongqing Central Forestry Reform and Development Fund Science and Technology Promotion Demonstration Project[10]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:001256476500001
出版者MDPI
资助机构Chongqing Central Forestry Reform and Development Fund Science and Technology Promotion Demonstration Project
源URL[http://ir.igsnrr.ac.cn/handle/311030/206340]  
专题陆地水循环及地表过程院重点实验室_外文论文
通讯作者Wang, Yunqi
作者单位1.China Inst Water Resources & Hydropower Res IWHR, Beijing 100038, Peoples R China
2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China
3.Chongqing Inst Geol & Mineral Resources, Observat & Res Stn Ecol Restorat Chongqing Typ Min, Minist Nat Resources, Chongqing 401120, Peoples R China
4.Southwest Forestry Univ, Sch Soil & Water Conservat, Kunming 650224, Peoples R China
5.Beijing Forestry Univ, Sch Soil & Water Conservat, Three Gorges Reservoir Area Chongqing Forest Ecosy, Forest Ecosyst Res Stn, Beijing 100083, Peoples R China
推荐引用方式
GB/T 7714		 Chang, Renfang,Wang, Yunqi,Liu, Huifang,et al. Optimizing Non-Point Source Pollution Management: Evaluating Cost-Effective Strategies in a Small Watershed within the Three Gorges Reservoir Area, China[J]. LAND,2024,13(6):21.
APA Chang, Renfang.,Wang, Yunqi.,Liu, Huifang.,Wang, Zhen.,Ma, Lei.,...&Li, Danqing.(2024).Optimizing Non-Point Source Pollution Management: Evaluating Cost-Effective Strategies in a Small Watershed within the Three Gorges Reservoir Area, China.LAND,13(6),21.
MLA Chang, Renfang,et al."Optimizing Non-Point Source Pollution Management: Evaluating Cost-Effective Strategies in a Small Watershed within the Three Gorges Reservoir Area, China".LAND 13.6(2024):21.

入库方式： OAI收割

来源：地理科学与资源研究所

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