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DOI10.1007/s11356-024-32562-0
Impact of climate change on water quality evolution in cold regions using a water-heat-nitrogen processes coupled model
发表日期2024
ISSN0944-1344
EISSN1614-7499
英文摘要Cold regions are particularly vulnerable to climate change. Thus, evaluating the response of water quality evolution to climate change in cold regions is vital for formulating adaptive countermeasures for pollution control under changing climatic conditions. Taking the Songhua River Basin (SRB) in Northeast China as the target area, we designed a water-heat-nitrogen coupled model based on the principle of water and energy transfer and nitrogen cycle processes model (WEP-N) in cold regions. The impact of climate change on pollution load and water quality was analyzed during the freezing, thawing, and non-freeze-thaw periods by taking the sudden change point (1998) of precipitation and runoff evolution in the SRB as the cut-off. The ammonia nitrogen load at Jiamusi station, the outlet control station in the SRB, was decreased by 1502.9 t in the change period (1999-2018) over the base period (1956-1998), with a - 9.2% decrease due to climate change. Compared to the ammonia nitrogen load during the base period, the ammonia nitrogen load decreased by - 171.3, - 506.9, and - 824.8 t during the freezing, thawing, and non-freeze-thaw periods, respectively, while the coefficient of variation showed an increasing trend during three periods, especially during the freezing and thawing periods. However, the water quality changes differed among periods owing to varying runoff during the year. Meanwhile, increasing runoff and decreasing ammonia nitrogen load improved water quality at Jiamusi station during the freezing period. During the thawing and non-freeze-thaw period, the water quality deteriorated due to the decrease in runoff more than the decrease in ammonia nitrogen load. Hence, the impact of climate change on water quality during thawing and non-freeze-thaw periods should be monitored to potentially offset the human influence on pollution control. The difference in the rate of change of the proportion of Class IV water between the two models with or without the soil freeze-thaw mechanism was 15.9%. The result shows that the application of a model that does not consider the freeze-thaw mechanism might slightly exaggerate the impact of climate change on water quality.
英文关键词Climate change; Water quality evolution; Cold region; Water-heat-nitrogen coupled model
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:001173086700011
来源期刊ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/286290
作者单位China Institute of Water Resources & Hydropower Research; Tsinghua University; China Institute of Water Resources & Hydropower Research; Ministry of Water Resources; University of Oslo
推荐引用方式
GB/T 7714
. Impact of climate change on water quality evolution in cold regions using a water-heat-nitrogen processes coupled model[J],2024.
APA (2024).Impact of climate change on water quality evolution in cold regions using a water-heat-nitrogen processes coupled model.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH.
MLA "Impact of climate change on water quality evolution in cold regions using a water-heat-nitrogen processes coupled model".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH (2024).
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