气候变化领域集成服务门户(CCPortal): Spatiotemporal shallow and deep groundwater dynamics in a forested mountain catchment with diverse slope gradients, western Japan

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DOI	10.1016/j.gsd.2024.101150
	Spatiotemporal shallow and deep groundwater dynamics in a forested mountain catchment with diverse slope gradients, western Japan
	Guyo, Rendilicha Halake; Wang, Kunyang; Saito, Mitsuyo; Onodera, Shin-ichi; Shimizu, Yuta; Moroizumi, Toshitsugu
发表日期	2024
ISSN	2352-801X
起始页码	25
卷号	25
英文摘要	The sustenance of groundwater resources relies heavily on the process of groundwater recharge, which is projected to become scarce in the future due to climate change and increasing human demand. Estimating groundwater recharge remains an exceptionally challenging task for hydrologists, particularly in catchments characterized by forest -dominant land use and abundant steep hillslopes, where the storage and flow of groundwater are intricately tied to factors such as climate patterns and specific hydrological processes across diverse slopes. Here, we applied the Soil and Water Assessment Tool (SWAT) to evaluate the spatiotemporal variability and magnitudes of shallow groundwater discharge and deep groundwater recharge to improve our understanding of precipitation patterns and terrain impact on groundwater recharge. Our results revealed significant variability in shallow groundwater discharge and deep groundwater recharge across the catchment, with average annual values of 305 mm/year and 165.77 mm/year, respectively. The spatiotemporal variability of these groundwater components was primarily influenced by climatic conditions; however, within the catchment zones, slopes below 20% made significant contributions to the observed variations. The upper mountainous areas influenced by snow contributed significantly to the catchment ' s groundwater resources, accounting for 42% of the shallow groundwater discharge and 46% of the deep groundwater recharge. In contrast, urbanized lowland areas made much smaller contributions - 13% of shallow groundwater discharge and 5% of deep groundwater recharge. Notably, during the driest year, both shallow groundwater discharge and deep groundwater recharge were insufficient to meet the daily water demand of the catchment, indicating the need for alternative water storage methods such as reservoirs. These findings offer insights for decision -making to enhance groundwater resource resilience in the region.
英文关键词	Forest; Asahi river catchment; Shallow groundwater discharge; Deep groundwater recharge; Slope; SWAT
语种	英语
WOS研究方向	Engineering ; Environmental Sciences & Ecology ; Water Resources
WOS类目	Engineering, Environmental ; Environmental Sciences ; Water Resources
WOS记录号	WOS:001222261200001
来源期刊	GROUNDWATER FOR SUSTAINABLE DEVELOPMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/302402
作者单位	Okayama University; Hiroshima University; National Agriculture & Food Research Organization - Japan
推荐引用方式 GB/T 7714	Guyo, Rendilicha Halake,Wang, Kunyang,Saito, Mitsuyo,et al. Spatiotemporal shallow and deep groundwater dynamics in a forested mountain catchment with diverse slope gradients, western Japan[J],2024,25.
APA	Guyo, Rendilicha Halake,Wang, Kunyang,Saito, Mitsuyo,Onodera, Shin-ichi,Shimizu, Yuta,&Moroizumi, Toshitsugu.(2024).Spatiotemporal shallow and deep groundwater dynamics in a forested mountain catchment with diverse slope gradients, western Japan.GROUNDWATER FOR SUSTAINABLE DEVELOPMENT,25.
MLA	Guyo, Rendilicha Halake,et al."Spatiotemporal shallow and deep groundwater dynamics in a forested mountain catchment with diverse slope gradients, western Japan".GROUNDWATER FOR SUSTAINABLE DEVELOPMENT 25(2024).