دورية أكاديمية
Dams alter the control pattern of watershed land use to riverine nutrient distribution: Comparison of three major rivers under different hydropower development levels in Southwestern China.
| العنوان: | Dams alter the control pattern of watershed land use to riverine nutrient distribution: Comparison of three major rivers under different hydropower development levels in Southwestern China. |
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| المؤلفون: | Xing X; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China., Wang P; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China. Electronic address: pfwang2005@hhu.edu.cn., Wang X; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China. Electronic address: xwang2014@hhu.edu.cn., Yuan Q; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China., Hu B; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China., Liu S; Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China. |
| المصدر: | Water research [Water Res] 2024 Aug 15; Vol. 260, pp. 121951. Date of Electronic Publication: 2024 Jun 16. |
| نوع المنشور: | Journal Article; Comparative Study |
| اللغة: | English |
| بيانات الدورية: | Publisher: Pergamon Press Country of Publication: England NLM ID: 0105072 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-2448 (Electronic) Linking ISSN: 00431354 NLM ISO Abbreviation: Water Res Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Oxford, Pergamon Press. |
| مواضيع طبية MeSH: | Rivers*/chemistry, China ; Nutrients/analysis ; Environmental Monitoring ; Phosphorus/analysis ; Nitrogen/analysis ; Seasons ; Water Pollutants, Chemical/analysis ; Water Quality |
| مستخلص: | Land use plays a critical role in managing water quality in a watershed, as it governs the import and distribution of nutrients. In addition to the land use, some rivers in Southwest China are encountering a new environmental stressor of damming, which is being driven by the national strategy of hydropower development. However, the coupling effect of land use and dams on nutrients remains poorly understood, challenging the effective management of riverine water quality. Therefore, this study examined the nutrients in the Nu, Yarlung Tsangpo (YT), and Lancang (LC) Rivers, which have no dam, 1 dam, and 11 dams, respectively, during different regulatory periods (spring and fall) to identify variations in nutrient control patterns influenced by land use and dams. The findings suggested that an increase in hydropower development contributed to a notable shift in nutrient patterns from land use regulation towards dam regulation and coupling effects. Land use dominated the nutrient variations of the Nu (27.4 %-32.8 %) and low hydropower development YT (25.2 %-30.9 %) Rivers during both seasons, but the primary contributors to the nutrient variations of the high hydropower development LC River were dams (17.9 %-41.6 %) and coupling effects (16.5 %-29.0 %). Dams transform nutrient levels and compositions through internal reservoir cycling, decoupling land use and nutrients. Partial least-squares structural equation model analysis further suggested that the coupling effects of the LC River were seasonal-specific, which was primarily attributed to hydrological variations that affected their interactions. During spring, the reservoir underwent a drainage mode characterized by high-level nutrients in the bottom water. Combined with the import of riverine nutrients, it exacerbated the increase of nutrients (synergistic effect). In contrast, the reservoir transitioned into a storage mode where it intercepted nutrients from the upstream and watershed during the fall, leading to a reduction in the previously observed increasing trend and an increase in nutrient variability (antagonism effect). Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. (Copyright © 2024 Elsevier Ltd. All rights reserved.) |
| فهرسة مساهمة: | Keywords: Coupling effect; Damming; Land use; Nutrients; Southwestern rivers |
| المشرفين على المادة: | 27YLU75U4W (Phosphorus) N762921K75 (Nitrogen) 0 (Water Pollutants, Chemical) |
| تواريخ الأحداث: | Date Created: 20240619 Date Completed: 20240725 Latest Revision: 20240725 |
| رمز التحديث: | 20240726 |
| DOI: | 10.1016/j.watres.2024.121951 |
| PMID: | 38896884 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1879-2448 |
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| DOI: | 10.1016/j.watres.2024.121951 |