Improving runoff estimation in a monsoon climatic region of Ethiopia

• Project/Area Number: 16K01218
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Geography
• Research Institution: Tottori University
• Principal Investigator: Haregeweyn N 鳥取大学, 国際乾燥地研究教育機構, 特命教授 (30754692)
• Project Period (FY): 2016-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000); Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2018: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2017: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2016: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 流出メカニズム / 土壌水分 / 水文学的応答 / 土地利用の変化 / 土壌侵食 / ガリー頭部の後退 / Hydrologic modelling / Land use change / Soil moisture / Gully-head retreat / Land management / Ecosystem services / Hydrologic response / Soil erosion / Runoff mechanism / Land use / Soil depth / rainfall / land use type / soil depth / soil moisture / runoff mechanisms / Upper Blue Nile / Saturation-excess runoff / Infiltration-excess

Outline of Final Research Achievements

Three contrasting watersheds found the Upper Blue Nile Basin (UBNB) were the focus of the studies. We also conducted global-scale review on land management.
The key findings were: (1) the dominant runoff generation mechanisms of the watersheds is saturation excess but its extent varies with land use type; (2) the land under acacia vegetation is characterized by low undergrowth and compacted soil surface that resulted in high sediment starved surface runoff, which could have huge potential to cause gully incision; (3) improved vegetation in 2019 has enhanced groundwater recharge that contributed for subsurface-water triggered gully erosion in Guder site; (4) the UBNB is experiencing a general trend both towards “more people more trees” or “more people more erosion” depending on the location and (5) global erosion-control efforts face a host of barriers related to technical, social and policy.

Academic Significance and Societal Importance of the Research Achievements

今回の研究は、既存または新規の水文学、侵食モデルにおいてそれぞれ飽和過剰流出と地下プロセスを組み込むためにさらなる研究の必要性を示唆している。我々の研究は5つ以上の国際会議といくつかの国内会議で発表された。

Research Products

• [Int'l Joint Research] Bahir Dar University(エチオピア)
• [Int'l Joint Research] Bahir Dar University(Ethiopia)
• [Journal Article] Effect of subsurface water level on gully headcut retreat in tropical highlands of Ethiopia (2021)
  • Author(s): (3)Yibeltal, M; Tsunekawa; Haregeweyn, N; Adgo, E; Meshesha, DT; Masunaga, T; Tsubo, M; Billi, P; Ebabu, K; Berihun, ML
  • Journal Title: Earth Surface Processes and Landforms Volume: 10.1002/esp.5095 Issue: 6 Pages: 1209-1222
  • DOI: 10.1002/esp.5095
• [Journal Article] Cropland expansion outweighs the monetary effect of declining natural vegetation on ecosystem services in sub-Saharan Africa (2020)
  • Author(s): Ayele Almaw Fenta; Atsushi Tsunekawa; Nigussie Haregeweyn; MitsuruTsubo; Hiroshi Yasuda; Takayuki Kawai; Kindiye Ebabu; Mulatu Liyew Berihun; Dagnenet Sultan; Ashebir Sewale Belay; Jain Sun
  • Journal Title: Ecosystem Services Volume: 45 Pages: 1-17
  • DOI: 10.1016/j.ecoser.2020.101154
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Predicting gully densities at sub-continental scales: a case study for the Horn of Africa. Earth Surface Processes and Landforms (2020)
  • Author(s): (2)Vanmaercke, M; Chen, YX; Haregeweyn, N; De Geeter, S; Campforts, B; Heyndrickx, W; Tsunekawa, A; Poesen, J.
  • Journal Title: Earth Surface Processes and Landforms Volume: 45 Issue: 15 Pages: 3763-3779
  • DOI: 10.1002/esp.4999
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] and susceptibility to water and wind erosion risks in the East Africa region (2020)
  • Author(s): Fenta, A. A., Tsunekawa, A., Haregeweyn, N., Poesen, J., Tsubo, M., Borrelli, P., Panagos, P., Vanmaercke, M., Broeckx, J. and Yasuda, H.:
  • Journal Title: SCIENCE OF THE TOTAL ENVIRONMENT Volume: 703 Pages: 135016-135016
  • DOI: 10.1016/j.scitotenv.2019.135016
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Analysis of long-term gully dynamics in different agro-ecology settings (2019)
  • Author(s): Yibeltal, M., Tsunekawa, A., Haregeweyn, N., Adgo, E., Meshesha, D.T., Aklog, D., Masunaga, T., Tsubo, M., Billi, P., Vanmaercke, M., Ebabu, K., Sultan, D., Liyew, M. and Dessie, M.:
  • Journal Title: CATENA Volume: 179 Pages: 160-174
  • DOI: 10.1016/j.catena.2019.04.013
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Exploring land use/land cover changes, drivers and their implications in contrasting agro-ecological environments of Ethiopia (2019)
  • Author(s): Berihun, M.L., Tsunekawa, A., Haregeweyn, N., Meshesha D.T., Adgo, E., Tsubo, M., Masunaga, T., Fenta A.A., Sultan, D. and Yibeltal M.
  • Journal Title: Land Use Policy Volume: 87 Pages: 104052-104052
  • DOI: 10.1016/j.landusepol.2019.104052
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Morphological characteristics and topographic thresholds of gullies in different agro-ecological environments (2019)
  • Author(s): Yibeltal, M., Tsunekawa, A., Haregeweyn, N., Adgo, D., Meshesha, D.T., Aklog, D., Masunaga, T., Tsubo, M., Billi, P., Ebabu, K., Fenta, A.A. and Berihun, M.L.:
  • Journal Title: GEOMORPHOLOGY Volume: 341 Pages: 15-27
  • DOI: 10.1016/j.geomorph.2019.05.012
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Hydrological responses to land use/land cover change and climate variability in contrasting agro-ecological environments of the Upper Blue Nile basin, Ethiopia (2019)
  • Author(s): Berihun, M.L., Tsunekawa, A., Haregeweyn, N., Meshesha, D.T., Adgo E., Tsubo, M., Masunaga, T., Fenta, A.A, Sultan, D., Yibeltal M. and Ebabu K.:
  • Journal Title: SCIENCE OF THE TOTAL ENVIRONMENT Volume: 689 Pages: 347-365
  • DOI: 10.1016/j.scitotenv.2019.06.338
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evaluation of satellite rainfall estimates over the Lake Tana basin at the source region of the Blue Nile River (2018)
  • Author(s): Fenta, AA., Yasuda, H., Shimizu, K., Ibaraki, Y., Haregeweyn, N., Kawai, T., Belay, AS., Sultan, D., Ebabu, K
  • Journal Title: Atmospheric Research Volume: 212 Pages: 43-53
  • DOI: 10.1016/j.atmosres.2018.05.009
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Landscape changes and its consequences on soil erosion in Baro river basin, Ethiopia (2018)
  • Author(s): Tilahun, AK., Haregeweyn, N. and Pingale, SM
  • Journal Title: Modeling Earth Systems and Environment Volume: 4 Issue: 2 Pages: 793-803
  • DOI: 10.1007/s40808-018-0466-5
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Comprehensive assessment of soil erosion risk for better land use planning in river basins: Case study of the Upper Blue Nile River (2017)
  • Author(s): Haregeweyn, N., Tsunekawa, A., Poesen, J., Tsubo, M., Meshesha, DT., Fenta, AA., Nyssen, J., Adgo, E.
  • Journal Title: Science of the Total Environment Volume: 574 Pages: 95-108
  • DOI: 10.1016/j.scitotenv.2016.09.019
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Comprehensive gully erosion characterization, monitoring and modelling: case studies from three contrasting sites in the Upper Blue Nile basin (2019)
  • Author(s): Haregeweyn, N., Yibeltal, M., Liyew, M., Tsunekawa, A., Mitusru, T., Fenta, A.A., Meshesha, D.T. and Vanmaercke M.:
  • Organizer: 8th International Symposium on Gully Erosion
  • Int'l Joint Research
• [Presentation] Overview of global SLM: A review on its distribution, successes and failures and its implications towards achieving a LDN world (2019)
  • Author(s): Haregeweyn, N., Tsunekawa, A., Tsubo, M., Fenta, A. A., Ebabu K., Kebede, B., Berihun, M.L. and Yibeltal, M.
  • Organizer: American Geophysical Union
  • Int'l Joint Research
• [Presentation] Runoff, soil loss, and soil properties as influenced by land use and management practices: Case study from the Upper Blue Nile basin, Ethiopia (2019)
  • Author(s): Ebabu, K., Tsunekawa, A., Haregeweyn, N., Adgo, E., Meshesha, D., Aklog, D., Masunaga, T., Tsubo, M., Sultan, D., and Fenta, A.A.:
  • Organizer: American Geophysical Union
  • Int'l Joint Research
• [Presentation] Analyzing long-term effect of gully erosion on land degradation in Upper Blue Nile basin, Ethiopia (2019)
  • Author(s): Yibeltal, M., Tsunekawa, A., Haregeweyn, N., Adgo, E., Meshesha, D.T., Masunaga, T., Tsubo, M., Ebabu, K., Fenta, A.A. and Berihun, M.L.
  • Organizer: American Geophysical Union
  • Int'l Joint Research
• [Presentation] Assessment of water and wind erosion risk over the Eastern Africa region. Paper presented at the FAO Soil Erosion Symposium (2019)
  • Author(s): Fenta, A.A., Tsunekawa, A., Haregeweyn, N., Tsubo, M., Poesen, J., Borrelli, P., Panagos, P., Vanmaercke, M. and Broeckx, J.
  • Organizer: FAO Soil Erosion Symposium
  • Int'l Joint Research
• [Presentation] The Dynamics and Counter Measures of Land Degradation: A Comparative Study of Three Paired Watersheds in Northwest Ethiopia (2018)
  • Author(s): Haregeweyn N., Tsunekawa, A., Yibeltal, M., Liyew, M., Ebabu, K., Tsubo, M. Derege, T.M
  • Organizer: International Soil Erosion Research Forum
  • Int'l Joint Research
• [Presentation] Analysis of gully erosion features under three contrasting environments of the Upper Blue Nile basin (2017)
  • Author(s): Nigussie Haregeweyn
  • Organizer: Gully erosion inventory and proposal for a modelling activity
• [Book] Nyssen J (ed.), Geo-Trekking in Ethiopia’s Tropical Mountains - The Dogu’a Tembien District (2019)
  • Author(s): Vanmaercke, M., Haregeweyn N., Zenebe, A., Nyssen,J. and Poesen , J
  • Total Pages: 678
  • Publisher: Springer Science+Business Media Dordrecht
  • ISBN: 9783030049553
• [Remarks] Research Gate
  • URL: https://www.researchgate.net/profile/N_Haregeweyn
• [Funded Workshop] 8th International Symposium on Gully Erosion (2019)
• [Funded Workshop] American Geophysical Union Fall Meeting (2019)