TY - JOUR
T1 - Landscape pattern and climate dynamics effects on ecohydrology and implications for runoff management
T2 - case of a dry Afromontane forest in northern Ethiopia
AU - Gebru, Belay Manjur
AU - Adane, Girma Berhe
AU - Park, Eunbeen
AU - Khamzina, Asia
AU - Lee, Woo Kyun
N1 - Publisher Copyright:
© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2022
Y1 - 2022
N2 - In this study, we assessed the land use land cover dynamics, rainfall trends, spatio-temporal runoff potentials, and proposed runoff management options in a dry Afromontane forest in northern Ethiopia. Satellite images (1986, 2001 and 2018) were classified using the maximum likelihood method, and responses to runoff were determined using a hydrologic model. A trend-free pre-whitening Mann–Kendall (TFPW-MK) test was used to analyze the areal weighted rainfall trends. The forest and shrubland coverage expanded (451 and 421 ha/year) between 1986 and 2001; however, the forest land showed lower rate of increment (248 ha/year) during 2001–2018 due to anthropogenic influences. The shift of bimodal rainy seasons to a monomodal with high runoff volume was experienced in 2001–2018. The TFPW-MK test revealed that the rainfall trend was statistically insignificant, but showed a decreasing pattern. In general, ecological restoration can be achieved via implementing the proposed conservation measures like percolation pond, storage tank, check dams, contour bunds, terraces, trenches, area closure and combination of these measures.
AB - In this study, we assessed the land use land cover dynamics, rainfall trends, spatio-temporal runoff potentials, and proposed runoff management options in a dry Afromontane forest in northern Ethiopia. Satellite images (1986, 2001 and 2018) were classified using the maximum likelihood method, and responses to runoff were determined using a hydrologic model. A trend-free pre-whitening Mann–Kendall (TFPW-MK) test was used to analyze the areal weighted rainfall trends. The forest and shrubland coverage expanded (451 and 421 ha/year) between 1986 and 2001; however, the forest land showed lower rate of increment (248 ha/year) during 2001–2018 due to anthropogenic influences. The shift of bimodal rainy seasons to a monomodal with high runoff volume was experienced in 2001–2018. The TFPW-MK test revealed that the rainfall trend was statistically insignificant, but showed a decreasing pattern. In general, ecological restoration can be achieved via implementing the proposed conservation measures like percolation pond, storage tank, check dams, contour bunds, terraces, trenches, area closure and combination of these measures.
KW - Hydrological modelling
KW - SCS-CN model
KW - remote sensing
KW - runoff response
KW - water conservation
UR - http://www.scopus.com/inward/record.url?scp=85129596251&partnerID=8YFLogxK
U2 - 10.1080/10106049.2022.2068673
DO - 10.1080/10106049.2022.2068673
M3 - Article
AN - SCOPUS:85129596251
JO - Geocarto International
JF - Geocarto International
SN - 1010-6049
ER -