气候变化领域集成服务门户(CCPortal): Availability of the current and future water resources in Equatorial Central Africa: case of the Nyong forest catchment in Cameroon

CCPortal

DOI	10.1007/s10661-024-12471-y
	Availability of the current and future water resources in Equatorial Central Africa: case of the Nyong forest catchment in Cameroon
	Ebode, Valentin Brice; Onana, Jean Yannick Ngono; Dzana, Jean Guy; Amougou, Joseph Armathe; Batha, Romain Armand Soleil; Boyomo, Thomas Magloire Souga; Mbeih, Gaston Evarice Ndjela
发表日期	2024
ISSN	0167-6369
EISSN	1573-2959
起始页码	196
结束页码	3
卷号	196 期号:3
英文摘要	To anticipate disasters (drought, floods, etc.) caused by environmental forcing and reduce their impacts on its fragile economy, sub-Saharan Africa needs a good knowledge of the availability of current water resources and reliable hydroclimatic forecasts. This study has an objective to quantify the availability of water resources in the Nyong basin and predict its future evolution (2024-2050). For this, the SWAT (Soil and Water Assessment Tool) model was used. The performance of this model is satisfactory in calibration (2001-2005) and validation (2006-2010), with R2, NSE, and KGE greater than 0.64. Biases of - 11.8% and - 13.9% in calibration and validation also attest to this good performance. In the investigated basin, infiltration (GW_RCH), evapotranspiration (ETP), surface runoff (SURQ), and water yield (WYLD) are greater in the East, probably due to more abundant rainfall in this part. The flows and sediment load (SED) are greater in the middle zone and in the Southwest of the basin, certainly because of the flat topography of this part, which corresponds to the valley floor. Two climate models (CCCma and REMO) predict a decline in water resources in this basin, and two others (HIRHAM5 and RCA4) are the opposite. However, based on a statistical study carried out over the historical period (2001-2005), the CCCma model seems the most reliable. It forecasts a drop in precipitation and runoff, which do not exceed - 19% and - 18%, respectively, whatever the emission scenario (RCP4.5 or RCP8.5). Climate variability (CV) is the only forcing whose impact is visible in the dynamics of current and future flows, due to the modest current (increase of + 102 km2 in builds and roads) and future (increase of + 114 km2 in builds and roads) changes observed in the evolution of land use and land cover (LULC). The results of this study could contribute to improving water resource management in the basin studied and the region.
英文关键词	Central Africa; Nyong basin; SWAT; Regional climate models; Climate variability; Land use and land cover change
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001168414400001
来源期刊	ENVIRONMENTAL MONITORING AND ASSESSMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/304626
作者单位	University of Yaounde I
推荐引用方式 GB/T 7714	Ebode, Valentin Brice,Onana, Jean Yannick Ngono,Dzana, Jean Guy,et al. Availability of the current and future water resources in Equatorial Central Africa: case of the Nyong forest catchment in Cameroon[J],2024,196(3).
APA	Ebode, Valentin Brice.,Onana, Jean Yannick Ngono.,Dzana, Jean Guy.,Amougou, Joseph Armathe.,Batha, Romain Armand Soleil.,...&Mbeih, Gaston Evarice Ndjela.(2024).Availability of the current and future water resources in Equatorial Central Africa: case of the Nyong forest catchment in Cameroon.ENVIRONMENTAL MONITORING AND ASSESSMENT,196(3).
MLA	Ebode, Valentin Brice,et al."Availability of the current and future water resources in Equatorial Central Africa: case of the Nyong forest catchment in Cameroon".ENVIRONMENTAL MONITORING AND ASSESSMENT 196.3(2024).