Evaluation of best management practices for controlling water pollution in an arid irrigation district
In agricultural regions, especially in arid and semi-arid irrigation districts with shallow groundwater, contamination of aquifers with nitrogen (N) and phosphorus (P) from fertilization and irrigation has been a growing concern, leading to downstream surface water quality degradation. This work sim...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-05-01
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| Series: | Agricultural Water Management |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0378377425001763 |
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| author | Tingting Wei Yanan Jiang Xun Zhang Yanan Chen Qihao Ma Jianzhe Hou Yakun Wang Bingwei Tong |
| author_facet | Tingting Wei Yanan Jiang Xun Zhang Yanan Chen Qihao Ma Jianzhe Hou Yakun Wang Bingwei Tong |
| author_sort | Tingting Wei |
| collection | DOAJ |
| description | In agricultural regions, especially in arid and semi-arid irrigation districts with shallow groundwater, contamination of aquifers with nitrogen (N) and phosphorus (P) from fertilization and irrigation has been a growing concern, leading to downstream surface water quality degradation. This work simulates the reactive transport and interaction of NO3, NH4 and soluble P in the soil-aquifer flow system by SWAT-MODFLOW-RT3D model and investigates the effectiveness of different Best Management Practices (BMPs) in reducing N and P pollution load, including nutrient management, residue cover, vegetation filter strip, and grassed waterways. The results show that the pollution load hotspots are distributed in the drainage ditch with groundwater depth less than 2 m, accounting for 25 % of the total area of the study area but contributing more than 50 % of the pollutant output. Among BMPs, the 30 % reduction in fertilizer (FR 30 %) led to limited pollution reduction, while implementing grass waterways resulted in the most significant improvements, with reductions of up to 31.5 % for total phosphorus (TP) and 19.6 % for total nitrogen (TN). The most effective strategy which combines 30 % fertilizer reduction, vegetation filter strip and grassed waterways can achieve reductions of 44.3 % for TP and 46.2 % for TN. These results emphasize the potential of tailored BMP strategies to mitigate nutrient pollution in groundwater- dominated watersheds, providing valuable insights for sustainable agricultural management and water quality protection. |
| format | Article |
| id | doaj-art-a6a025fd0b4046dea5c08c009eabc70d |
| institution | OA Journals |
| issn | 1873-2283 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Agricultural Water Management |
| spelling | doaj-art-a6a025fd0b4046dea5c08c009eabc70d2025-08-20T02:13:07ZengElsevierAgricultural Water Management1873-22832025-05-0131210946210.1016/j.agwat.2025.109462Evaluation of best management practices for controlling water pollution in an arid irrigation districtTingting Wei0Yanan Jiang1Xun Zhang2Yanan Chen3Qihao Ma4Jianzhe Hou5Yakun Wang6Bingwei Tong7College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR ChinaCollege of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Key Laboratory of Arid Agricultural Soil and Water Engineering of Ministry of Education, Northwest A&F University, Yangling, Shaanxi 712100, PR China; Corresponding author at: College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR China.College of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR ChinaCollege of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR ChinaCollege of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR ChinaCollege of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR ChinaCollege of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, Shaanxi 712100, PR ChinaNingxia Institute of Water Resources Research, Yinchuan, Ningxia Hui Autonomous Region 750021, PR ChinaIn agricultural regions, especially in arid and semi-arid irrigation districts with shallow groundwater, contamination of aquifers with nitrogen (N) and phosphorus (P) from fertilization and irrigation has been a growing concern, leading to downstream surface water quality degradation. This work simulates the reactive transport and interaction of NO3, NH4 and soluble P in the soil-aquifer flow system by SWAT-MODFLOW-RT3D model and investigates the effectiveness of different Best Management Practices (BMPs) in reducing N and P pollution load, including nutrient management, residue cover, vegetation filter strip, and grassed waterways. The results show that the pollution load hotspots are distributed in the drainage ditch with groundwater depth less than 2 m, accounting for 25 % of the total area of the study area but contributing more than 50 % of the pollutant output. Among BMPs, the 30 % reduction in fertilizer (FR 30 %) led to limited pollution reduction, while implementing grass waterways resulted in the most significant improvements, with reductions of up to 31.5 % for total phosphorus (TP) and 19.6 % for total nitrogen (TN). The most effective strategy which combines 30 % fertilizer reduction, vegetation filter strip and grassed waterways can achieve reductions of 44.3 % for TP and 46.2 % for TN. These results emphasize the potential of tailored BMP strategies to mitigate nutrient pollution in groundwater- dominated watersheds, providing valuable insights for sustainable agricultural management and water quality protection.http://www.sciencedirect.com/science/article/pii/S0378377425001763Arid irrigation districtsNon-point source pollutionSWAT-MODFLOW-RT3D modelBest management practices |
| spellingShingle | Tingting Wei Yanan Jiang Xun Zhang Yanan Chen Qihao Ma Jianzhe Hou Yakun Wang Bingwei Tong Evaluation of best management practices for controlling water pollution in an arid irrigation district Agricultural Water Management Arid irrigation districts Non-point source pollution SWAT-MODFLOW-RT3D model Best management practices |
| title | Evaluation of best management practices for controlling water pollution in an arid irrigation district |
| title_full | Evaluation of best management practices for controlling water pollution in an arid irrigation district |
| title_fullStr | Evaluation of best management practices for controlling water pollution in an arid irrigation district |
| title_full_unstemmed | Evaluation of best management practices for controlling water pollution in an arid irrigation district |
| title_short | Evaluation of best management practices for controlling water pollution in an arid irrigation district |
| title_sort | evaluation of best management practices for controlling water pollution in an arid irrigation district |
| topic | Arid irrigation districts Non-point source pollution SWAT-MODFLOW-RT3D model Best management practices |
| url | http://www.sciencedirect.com/science/article/pii/S0378377425001763 |
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