Climate change will pose challenges to water quality management in the st. Croix River basin
Climate change will pose challenges to water quality management in the st. Croix River basin
复制标题
气候变化将对圣路易斯的水质管理带来挑战。
DOI：
10.1016/j.envpol.2019.04.129
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发表时间：
2019
影响因子：
8.9
通讯作者：
Li, Xia
中科院分区：
文献类型：
--
作者：
Yang, Qichun;Zhang, Xuesong;Almendinger, James E.;Huang, Maoyi;Chen, Xingyuan;Leng, Guoyong;Zhou, Yuyu;Zhao, Kaiguang;Asrar, Ghassem R.;Li, Xia
为了有效地管理水质和控制污染，应调查径流和营养物输出对气候条件变化的反应。使用降尺度的气候预测和土壤和水评估工具（SWAT），我们预计未来的径流量，沉积物输出，并在圣克鲁瓦河流域（SCRB）在2020-2099年的河流营养输出。结果表明，在未来的气候条件下，特别是在高温室气体排放情景下，河流的水，沉积物和营养负荷大幅增加。强化水循环和增强营养输出将对水质管理提出挑战，并影响旨在减少SCRB营养负荷的多项最佳管理实践（BMPs）工作。除了气候变化对陆地水文的物理影响，我们的分析表明，在大气CO2浓度升高的ET显着减少。气候变化引起的植物生理变化可能会显著影响水循环以及相关的沉积物和营养物质输出。这项研究的结果突出了审查气候变化对水和养分输送的影响，有效的流域管理的重要性。
Responses of streamflow and nutrient export to changing climate conditions should be investigated for effective water quality management and pollution control. Using downscaled climate projections and the Soil and Water Assessment Tool (SWAT), we projected future streamflow, sediment export, and riverine nutrient export in the St. Croix River Basin (SCRB) during 2020–2099. Results show substantial increases in riverine water, sediment, and nutrient load under future climate conditions, particularly under the high greenhouse gas emission scenario. Intensified water cycling and enhanced nutrient export will pose challenges to water quality management and affect multiple Best Management Practices (BMPs) efforts, which are aimed at reducing nutrient loads in SCRB. In addition to the physical impacts of climate change on terrestrial hydrology, our analyses demonstrate significant reductions in ET under elevated atmospheric CO2concentrations. Changes in plant physiology induced by climate change may markedly affect water cycling and associated sediment and nutrient export. Results of this study highlight the importance of examining climate change impacts on water and nutrient delivery for effective watershed management.