Dessalegn Worku Ayalew

Research themes
  • Water resources (management)
  • Land use and food security
  • Environmental and climate change
  • Agriculture, land use, climate change
Research countries
  • Ethiopia
Additional information

Funding: DAAD

Degrees

BSc in Soil Resources and Watershed Management

MSc in Water Engineering

MSc in Mediterranean Forestry and Natural Resources Management

Expertise

Hydrologist

Funding institutions

DAAD

Thesis title

Advancing Hydrological Modeling in the upper Blue Nile, Ethiopia

Thesis abstract

Water and soil resources are threatened by diverse factors such as climate change, land use change, and water management practices. Understanding changes in these factors and quantifying their impacts on water and soil resources are prerequisites for planning and implementing proper management practices to ensure their sustainability. Hydrological models are tools used to quantify these impacts; however, modeling remains uncertain due to biased input data and issues with model calibration, structure, and parameterization. Hence, advancing hydrological modeling is important and can be achieved by improving the input data. This is especially crucial for developing countries like Ethiopia, which face input data scarcity and quality issues. Therefore, this study aims to advance hydrological modeling through enhanced input data, such as climate, spatial (soil and land use), and hydrological data, to reliably estimate the effects of climate and land use changes on water balance components and sediment yield. The Kessie watershed in Ethiopia’s upper Blue Nile Basin will serve as a case study. The Soil and Water Assessment Tool (SWAT), a semi-distributed hydrological model, will be calibrated and validated using the improved input data. Then, the calibrated and validated SWAT model will be used to simulate future water balance components and sediment yield using a bias-corrected, best-fit ensemble climate model and projected land use change data as inputs. By advancing hydrological modeling, the study aims to equip policymakers and water resource managers with more reliable predictions, enabling proactive measures to address potential challenges arising from climate and land use changes.

Supervisors of
doctoral work

First Supervisor: Pro.Dr. Christain Borgemeister

Second Supervioser: Dr. Luna Bharati

Advisor at ZEF

Dr. Navneet Kumar

2023

Asnake Enawgaw Amognehegn, Asmare Belay Nigussie, Dessalegn Worku Ayalew, Fikru F. Abera, Mihret Ayana.  2023.  Evaluating climate change impact on the hydrology of Kessie Watershed, Upper Blue Nile Basin, Ethiopia.  : 20   . (Open Access)   Download [PDF]

2022

Ajanaw Negese, Dessalegn Worku, Alazar Shitaye, Haile Getnet.  2022.  Potential flood‑prone area identification and mapping using GIS‑based multi‑criteria decision‑making and analytical hierarchy process in Dega Damot district, northwestern Ethiopia.  : 21   . Download [PDF]
Dessalegn Worku Ayalew, Tirusew Asefa , Mamaru Ayalew Moges, and Sileshie Mesfin Leyew.  2022.  Evaluating the potential impact of climate change on the hydrology of Ribb catchment, Lake Tana Basin, Ethiopia.  : 16   . (Open Access)   Download [PDF]
Dessalegn Worku Ayalewa, Andrea Petroselli , Davide Luciano De Luca, Salvatore Grimaldi.  2022.  An evidence for enhancing the design hydrograph estimation for small and ungauged basins in Ethiopia.  : 17   . (Open Access)   Download [PDF]

Additionals, Curriculum Vitae
and Downloads

Dessalegn Worku Ayalew

Junior Researcher

Phone:
+49-228-73-1897/4930

Division/Group:
Ecology and Natural Resources Management

E-Mail:
s98dayal(at)uni-bonn.de/desuworku60(at)gmail.com

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