Landscape pattern and climate dynamics effects on ecohydrology and implications for runoff management: case of a dry Afromontane forest in northern Ethiopia

Belay Manjur Gebru, Girma Berhe Adane, Eunbeen Park, Asia Khamzina, Woo Kyun Lee

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)12466-12487
Number of pages22
JournalGeocarto International
Volume37
Issue number26
DOIs
Publication statusPublished - 2022

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) under Grant No. 2021K1A3A1A78097879. The authors thank the OJEong Resilience Institute (OJERI) at Korea University, the National Meteorological Agency of Ethiopia, Tigray Institute of Policy Studies (TIPS), Ethiopia and the Haramaya University - Haramaya Institute of Technology (HiT), Ethiopia for their support during the study.

Publisher Copyright:
© 2022 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.

Keywords

  • Hydrological modelling
  • SCS-CN model
  • remote sensing
  • runoff response
  • water conservation

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Water Science and Technology

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