干旱区生态环境知识资源中心(Arid): Tolerance to waterlogging determines the effectiveness of biodrainage in mitigating runoff in hillslope-scale simulations

Arid

DOI	10.1016/j.catena.2024.108149
	Tolerance to waterlogging determines the effectiveness of biodrainage in mitigating runoff in hillslope-scale simulations
	Weldegebriel, Liya; Thompson, Sally; Tilahun, Seifu; Guzman, Christian
通讯作者	Weldegebriel, L
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2024
卷号	243
英文摘要	Reversal of land degradation in agricultural systems through a wide range of natural resources management tailored to the specific climate, soil, and topography is crucial. This is especially critical for subsistence farming systems such as the Ethiopian Highlands, subject to some of the highest soil erosion rates in the world. Although biodrainage is widely and successfully used for waterlogging and erosion control in arid regions, it is not widely applied in sub-humid places like the Ethiopian Highlands. Beginning with field observations of the complex vertical soil profiles and variations in lithology and soil hydraulic properties along a hillslope ridge-channel transect in the Debre Mawi watershed of the Abay (Upper Blue Nile) Basin in the Ethiopian Highlands, we construct a synthetic model hillslope in HYRDUS-2D. For the growing season coinciding with the rainy season, known as Kiremt, we calibrated the hillslope water storage using observations of water table elevation. The synthetic hillslope is then used to test the feasibility of biodrainage to mitigate saturation, a major driver of gullying and soil loss in the area, and to identify plant traits to which such mitigation is sensitive. The simulation results using bare soil, eucalyptus and maize land covers revealed that in spite of low potential evapotranspiration during the Kiremt season, biodrainage with Eucalyptus can reduce the occurrence and duration of saturation of the top 0.6 m surface soil profile of the hillslope. Of the different plant traits explored, the maximum soil water potential at which the crop can transpire at potential rates, and the LAI, which controls potential evaporation rates via the crop coefficient, provide the most important controls on the effectiveness of biodrainage in desaturating the hillslope. We conclude that biodrainage strategies to mitigate soil erosion in sub humid locales merits further investigation through empirical trials. However, implementation of biodrainage strategies should be subject to thoughtful consideration of the implications for socio-economic outcomes and the local environment.
英文关键词	Biodrainage Soil erosion Conservation Runoff Ethiopian Highlands
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001259235600001
WOS关键词	BLUE NILE BASIN ; SATURATED HYDRAULIC CONDUCTIVITY ; SOUTH WESTERN-AUSTRALIA ; SOIL-MOISTURE CONTENT ; ETHIOPIAN HIGHLANDS ; WATER-USE ; EVAPORATION METHOD ; LEAF-AREA ; CONSERVATION PRACTICES ; EUCALYPTUS-GLOBULUS
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403162
推荐引用方式 GB/T 7714	Weldegebriel, Liya,Thompson, Sally,Tilahun, Seifu,et al. Tolerance to waterlogging determines the effectiveness of biodrainage in mitigating runoff in hillslope-scale simulations[J],2024,243.
APA	Weldegebriel, Liya,Thompson, Sally,Tilahun, Seifu,&Guzman, Christian.(2024).Tolerance to waterlogging determines the effectiveness of biodrainage in mitigating runoff in hillslope-scale simulations.CATENA,243.
MLA	Weldegebriel, Liya,et al."Tolerance to waterlogging determines the effectiveness of biodrainage in mitigating runoff in hillslope-scale simulations".CATENA 243(2024).