Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk
Excessive nitrogen exported to water bodies affects the balance of ecosystem and poses a threat to human health. Although the concept of water purification service helps quantify nitrogen export, the impact of river transport remains unclear. This study focused on nitrogen as a pollutant by utilizin...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Environment International |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0160412024007803 |
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| author | Jian Peng Tianhan Lan Jiabin Wang Pei Xia Huining Zheng |
| author_facet | Jian Peng Tianhan Lan Jiabin Wang Pei Xia Huining Zheng |
| author_sort | Jian Peng |
| collection | DOAJ |
| description | Excessive nitrogen exported to water bodies affects the balance of ecosystem and poses a threat to human health. Although the concept of water purification service helps quantify nitrogen export, the impact of river transport remains unclear. This study focused on nitrogen as a pollutant by utilizing the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model to assess nitrogen export in the Dongting Lake Basin, taking into account both the processes of sub-basin nitrogen export and river transport. Additionally, the monthly variations within the year were further explored, together with the identification of the priority area of returning cropland to forest land. The results showed that in 2021, the total nitrogen load outside the Dongting Lake was 11.34 × 108 kg·year−1, with the sub-basins retaining a total of 9.02 × 108 kg·year−1, accounting for 79.57 % of the total nitrogen load. Notably, the total nitrogen retention by the river made up 16.87 % of the total nitrogen retention, up to 1.83 × 108 kg·year−1. In view of monthly variation, water purification service based on the entire process was higher in winter and late autumn, and lower in summer and early autumn. The priority areas for ecological project were mainly distributed around the Dongting Lake, achieving an improvement of 58.15 % in water purification service with approximately 7.02 % of the total returnable cropland. This study proposed a new approach of water purification service assessment through integrating river transport processes and seasonal dynamics, aiming to assess watershed nitrogen export risk more accurately. |
| format | Article |
| id | doaj-art-d9b3926786b54c63a1718d555d732f8d |
| institution | Kabale University |
| issn | 0160-4120 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Environment International |
| spelling | doaj-art-d9b3926786b54c63a1718d555d732f8d2025-01-24T04:44:01ZengElsevierEnvironment International0160-41202025-01-01195109194Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export riskJian Peng0Tianhan Lan1Jiabin Wang2Pei Xia3Huining Zheng4Technology Innovation Center for Integrated Ecosystem Restoration and Sustainable Utilization, Ministry of Natural Resources, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China; Corresponding author.Technology Innovation Center for Integrated Ecosystem Restoration and Sustainable Utilization, Ministry of Natural Resources, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaKey Laboratory of Earth Surface System and Human-Earth Relations, Ministry of Natural Resources, School of Urban Planning and Design, Shenzhen Graduate School, Peking University, Shenzhen 518055, ChinaTechnology Innovation Center for Integrated Ecosystem Restoration and Sustainable Utilization, Ministry of Natural Resources, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaTechnology Innovation Center for Integrated Ecosystem Restoration and Sustainable Utilization, Ministry of Natural Resources, College of Urban and Environmental Sciences, Peking University, Beijing 100871, ChinaExcessive nitrogen exported to water bodies affects the balance of ecosystem and poses a threat to human health. Although the concept of water purification service helps quantify nitrogen export, the impact of river transport remains unclear. This study focused on nitrogen as a pollutant by utilizing the Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST) model to assess nitrogen export in the Dongting Lake Basin, taking into account both the processes of sub-basin nitrogen export and river transport. Additionally, the monthly variations within the year were further explored, together with the identification of the priority area of returning cropland to forest land. The results showed that in 2021, the total nitrogen load outside the Dongting Lake was 11.34 × 108 kg·year−1, with the sub-basins retaining a total of 9.02 × 108 kg·year−1, accounting for 79.57 % of the total nitrogen load. Notably, the total nitrogen retention by the river made up 16.87 % of the total nitrogen retention, up to 1.83 × 108 kg·year−1. In view of monthly variation, water purification service based on the entire process was higher in winter and late autumn, and lower in summer and early autumn. The priority areas for ecological project were mainly distributed around the Dongting Lake, achieving an improvement of 58.15 % in water purification service with approximately 7.02 % of the total returnable cropland. This study proposed a new approach of water purification service assessment through integrating river transport processes and seasonal dynamics, aiming to assess watershed nitrogen export risk more accurately.http://www.sciencedirect.com/science/article/pii/S0160412024007803Nitrogen pollutionRiver transport processSeasonal dynamicsWater purification serviceDongting Lake Basin |
| spellingShingle | Jian Peng Tianhan Lan Jiabin Wang Pei Xia Huining Zheng Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk Environment International Nitrogen pollution River transport process Seasonal dynamics Water purification service Dongting Lake Basin |
| title | Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk |
| title_full | Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk |
| title_fullStr | Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk |
| title_full_unstemmed | Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk |
| title_short | Integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk |
| title_sort | integrating river transport processes and seasonal dynamics to assess watershed nitrogen export risk |
| topic | Nitrogen pollution River transport process Seasonal dynamics Water purification service Dongting Lake Basin |
| url | http://www.sciencedirect.com/science/article/pii/S0160412024007803 |
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