Soil Erosion Risk Assessment Due to Land Use/Land Cover Changes (Lulc) in Hangar River Watershed, Northwest Ethiopia

Tukura, Nasir Gebi; Akalu, Mahmud Mustefa

doi:10.12957/jse.2019.46538

Cited by 7 publications

(4 citation statements)

References 4 publications

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“…Runoff is a driving force for soil erosion. Soil erosion is a main environmental and economic fear affecting all continents around the world (Tukura and Akalu 2019). Soil erosion is intensely increasing and accelerating in developing countries like Ethiopia.…”

Section: Introductionmentioning

confidence: 99%

Surface runoff modeling using SWAT analysis in Dabus watershed, Ethiopia

Diriba

2021

Sustain. Water Resour. Manag.

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The highlands of Ethiopia are highly threatened by soil erosion. Surface runoff is essential input to manage the watershed. Runoff causes soil erosion which makes sedimentation of reservoirs. The study aimed to simulate surface runoff using the Soil and Water Assessment Tools (SWAT) model in Dabus watershed, Ethiopia. The Dabus River is one of the major tributaries of the Blue Nile River which starts from southeastern highland and flows toward north. Since the topography of the watershed is mountainous steep slope areas, surface runoff is high. The Dabus watershed was delineated into 33 sub-basins and 82 hydraulic response units (HRUs). In this study, surface runoff was simulated using 30 years meteorological data as an input. The model was calibrated and validated for stream flow using sequential uncertainty ftting-2 (SUFI_2) of the SWAT Calibration and Uncertainty Programs (SWAT_CUP). The model was calibrated using 9-year measured streamflow data (1994)(1995)(1996)(1997)(1998)(1999)(2000)(2001)(2002)(2003) and validated using 8-year streamflow data (2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011). The coefficient of determination (R 2 ) and Nash-Sutclife (NSE) were used to measure the performance of the model. R 2 and NSE were 0.82 and 0.70 during calibration and 0.78 and 0.71 during validation, respectively. The results show that there was very good relation between monthly observed and simulated streamflow during both calibration and validation. Simulated average annual surface runoff of the watershed was 690.84 mm. The southeast part of the watershed was characterized by the highest annual surface runoff. Thus, this study shows that SWAT hydrological model can be used to model Dabus watershed for better assessment and simulation of the hydrological responses. The study recommends more researches which incorporate the land use change of the watershed in the model.

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Section: Introductionmentioning

confidence: 99%

Surface runoff modeling using SWAT analysis in Dabus watershed, Ethiopia

Diriba

2021

Sustain. Water Resour. Manag.

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“…In the Hanger river watershed of North West Ethiopia, mean soil erosion potential was assessed at 55.5tons ha -1 year -1 in 2005 and 70.5tons ha -1 year -1 in 2017, with an upward trend [34]. Soil erosion rates in the Guder watershed in Central Ethiopia ranged from 25 to 30tons ha -1 yr -1 [35].…”

Section: Soil Loss Rate In Blue Nile River Basinmentioning

confidence: 99%

Soil Erosion and Sedimentation Rate in the Blue Nile River Basin of Ethiopia

Tesfaye¹

2022

AJEP

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Substantial runoff is a feature of the Ethiopian Nile River Basin because its soils are erodible and poorly organized, resulting in high soil loss and sedimentation rates. The rate of soil erosion and sedimentation in the basin was reported to be quite variable, which could be owing to the methodology utilized and data quality used. By reviewing recent studies, this review primarily aimed to give information on the range of soil erosion and sedimentation rates. Recent studies at small watersheds and basin levels were reviewed. Soil loss and sedimentation rates in Ethiopia's Blue Nile River Basin ranged from 16 to 67.37ton ha -1 year -1 and 4.2 to 18ton ha -1 year -1 , respectively. Similarly, at watersheds level soil loss and sedimentation rates were reported to range from 8.25 to 100ton ha -1 year -1 and 1.1 to 43.34ton ha -1 year -1 respectively. Hence it is concluded that high soil erosion and sedimentation rates are serious problems in the basin. So, appropriate soil and water conservation measures are recommended throughout the basin to reduce both on-site and off-site effects of soil erosion. It is also highly advised to utilize uniform techniques and a common data source for soil erosion and sedimentation rates estimation at different levels.

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Section: Introductionmentioning

confidence: 99%

Surface runoff modeling in Ketar watershed, Ethiopia

Sime

Demissie

Tufa

2020

J. Sediment. Environ.

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Surface runoff is a critical input in watershed management. Runoff is a driving force for soil erosion which causes sedimentation of reservoirs located at downstream of watersheds. The present study aimed to model surface runoff using the Soil and Water Assessment Tools (SWAT) model in Ketar watershed, Ethiopia. Ketar river crosses mountainous steep slope areas. High surface runoff from the Ketar watershed flows to Lake Ziway. The Ketar watershed was delineated into 35 subbasins and 147 Hydraulic Response Units (HRUs). In this work, surface runoff was simulated using 36 years meteorological data as input. The model was calibrated and validated for streamflow using sequential uncertainty fitting-2 (SUFI_2) of the SWAT Calibration and Uncertainty Programs (SWAT_CUP). The model calibrated using 12-year measured streamflow data (1988)(1989)(1990)(1991)(1992)(1993)(1994)(1995)(1996)(1997) and validated using 7-year streamflow data (1998)(1999)(2000)(2001)(2002)(2003)(2004). The coefficient of determination (R 2 ) and Nash-Sutcliffe (NSE) were used to measure the performance of the model. R 2 and NSE were 0.82 and 0.7 during calibration and 0.78 and 0.71 during validation, respectively. The results show that there was an excellent relation between monthly observed and simulated streamflow during both calibration and validation. Simulated average monthly surface runoff of the watershed was 112.82 mm per month. The southwest part of the watershed, which was characterized by highest annual surface runoff, covers 27% of the total area.

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Soil Erosion Risk Assessment Due to Land Use/Land Cover Changes (Lulc) in Hangar River Watershed, Northwest Ethiopia

Cited by 7 publications

References 4 publications

Surface runoff modeling using SWAT analysis in Dabus watershed, Ethiopia

Surface runoff modeling using SWAT analysis in Dabus watershed, Ethiopia

Soil Erosion and Sedimentation Rate in the Blue Nile River Basin of Ethiopia

Surface runoff modeling in Ketar watershed, Ethiopia

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