气候变化领域集成服务门户(CCPortal): Combined impacts of climate and land-use change on future water resources in Africa

CCPortal

DOI	10.5194/hess-28-117-2024
	Combined impacts of climate and land-use change on future water resources in Africa
	Chawanda, Celray James; Nkwasa, Albert; Thiery, Wim; van Griensven, Ann
发表日期	2024
ISSN	1027-5606
EISSN	1607-7938
起始页码	28
结束页码	1
卷号	28 期号:1
英文摘要	Africa depends on its water resources for hydroelectricity, inland fisheries and water supply for domestic, industrial and agricultural operations. Anthropogenic climate change (CC) has changed the state of these water resources. Land use and land cover have also undergone significant changes due to the need to provide resources to a growing population. Yet, the impact of the land-use and land cover change (LULCC) in addition to CC on the water resources of Africa is underexplored. Here we investigate how precipitation, evapotranspiration (ET) and river flow respond to both CC and LULCC scenarios across the entire African continent. We set up a Soil and Water Assessment Tool (SWAT + ) model for Africa and calibrated it using the hydrological mass balance calibration (HMBC) methodology detailed in Chawanda et al. (2020a). The model was subsequently driven by an ensemble of bias-adjusted global climate models to simulate the hydrological cycle under a range of CC and LULCC scenarios. The results indicate that the Zambezi and the Congo River basins are likely to experience reduced river flows under CC with an up to 7 % decrease, while the Limpopo River will likely have higher river flows. The Niger River basin is likely to experience the largest decrease in river flows in all of Africa due to CC. The Congo River basin has the largest difference in river flows between scenarios with (over 18 % increase) and without LULCC (over 20 % decrease). The projected changes have implications for the agriculture and energy sectors and hence the livelihood of people on the continent. Our results highlight the need to adopt policies to halt global greenhouse gas emissions and to combat the current trend of deforestation to avoid the high combined impact of CC and LULCC on water resources in Africa.
语种	英语
WOS研究方向	Geology ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:001168860400001
来源期刊	HYDROLOGY AND EARTH SYSTEM SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/303033
作者单位	Vrije Universiteit Brussel; IHE Delft Institute for Water Education; Texas A&M University System; Texas A&M University College Station; Texas A&M AgriLife Research
推荐引用方式 GB/T 7714	Chawanda, Celray James,Nkwasa, Albert,Thiery, Wim,et al. Combined impacts of climate and land-use change on future water resources in Africa[J],2024,28(1).
APA	Chawanda, Celray James,Nkwasa, Albert,Thiery, Wim,&van Griensven, Ann.(2024).Combined impacts of climate and land-use change on future water resources in Africa.HYDROLOGY AND EARTH SYSTEM SCIENCES,28(1).
MLA	Chawanda, Celray James,et al."Combined impacts of climate and land-use change on future water resources in Africa".HYDROLOGY AND EARTH SYSTEM SCIENCES 28.1(2024).