The response of non-point source pollution to climate change in an orchard-dominant coastal watershed.

Autor: Han Y; College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; Key Laboratory of Arable Land Conservation in North China, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China; Technology Innovation Center of Land Engineering, Ministry of Natural Resources, Beijing, 100037, China., Liu Z; College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; Key Laboratory of Arable Land Conservation in North China, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China; Technology Innovation Center of Land Engineering, Ministry of Natural Resources, Beijing, 100037, China. Electronic address: lzh@cau.edu.cn., Chen Y; College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; Key Laboratory of Arable Land Conservation in North China, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China., Qi J; Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD, 20740, USA., Feng P; College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; Key Laboratory of Arable Land Conservation in North China, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China; Technology Innovation Center of Land Engineering, Ministry of Natural Resources, Beijing, 100037, China., Liu L; NSW Department of Primary Industries, Wagga Wagga Agricultural Institute, Wagga Wagga, NSW, 2650, Australia; Climate Change Research Centre, University of New South Wales, Sydney, 2052, Australia., Shi J; College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; Sichuan Institute of Land and Space Ecological Restoration and Geohazards Prevention, Chengdu, 610081, China., Meng L; Yantai Hydrology Bureau, Yantai, 264009, China., Chen Y; College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; Key Laboratory of Arable Land Conservation in North China, Ministry of Agriculture and Rural Affairs, Beijing, 100193, China; Technology Innovation Center of Land Engineering, Ministry of Natural Resources, Beijing, 100037, China. Electronic address: yongchen@cau.edu.cn.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 Oct 15; Vol. 259, pp. 119515. Date of Electronic Publication: 2024 Jul 03.
DOI: 10.1016/j.envres.2024.119515
Abstrakt: China is the largest global orchard distribution area, where high fertilization rates, complex terrain, and uncertainties associated with future climate change present challenges in managing non-point source pollution (NPSP) in orchard-dominant growing areas (ODGA). Given the complex processes of climate, hydrology, and soil nutrient loss, this study utilized an enhanced Soil and Water Assessment Tool model (SWAT-CO 2 ) to investigate the impact of future climate on NPSP in ODGA in a coastal basin of North China. Our investigation focused on climate-induced variations in hydrology, nitrogen (N), and phosphorus (P) losses in soil, considering three Coupled Model Intercomparison Project phase 6 (CMIP6) climate scenarios: SSP1-2.6, SSP2-4.5, and SSP5-8.5. Research results indicated that continuous changes in CO 2 levels significantly influenced evapotranspiration (ET) and water yield in ODGA. Influenced by sandy soils, nitrate leaching through percolation was the principal pathway for N loss in the ODGA. Surface runoff was identified as the primary pathway for P loss. Compared to the reference period (1971-2000), under three future climate scenarios, the increase in precipitation of ODGA ranged from 15% to 28%, while the growth rates of P loss and surface runoff were the most significant, both exceeding 120%. Orchards in the northwest basin proved susceptible to nitrate leaching, while others were more sensitive to N and P losses via surface runoff. Implementing targeted strategies, such as augmenting organic fertilizer usage and constructing terraced fields, based on ODGA's response characteristics to future climate, could effectively improve the basin's environment.
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. Published by Elsevier Inc.)
Databáze: MEDLINE
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