“…This ensured a high correlation between the predicted and observed flow. The model performance results for this study were consistent with findings from prior research projects carried out in the upper Awash River basin [ 25 ]. Fig.…”
Section: Resultssupporting
confidence: 88%
“…R 2 , NSE and percent bias during calibration for the 2005 LULC data were 0.81, 0.68, and −66.18, respectively ( Table 5 ). The model performance result is better than the previous study results in this area [ 25 ].…”
Section: Resultscontrasting
confidence: 78%
“…Similar findings have also been reported in other studies conducted in different parts of Ethiopia. For instance, Boru et al (2022) [ 25 ] reported that the average annual sediment yield of the Melka Werer watershed is 21.43 t/ha/year. According to Kidane et al (2019) [ 71 ], the mean annual soil erosion rate of the Guder watershed ranges between 25 and 30 t/ha/year.…”
Section: Discussionmentioning
confidence: 99%
“…According to Ref. [ 25 ], the average annual sediment product entering the Koka Dam reservoir is 21.43 t/ha/yr. 106,352.59 tons of average annual sediment output entered to the Merti intake structure, which was built in the Awash River [ 26 ].…”
“…This ensured a high correlation between the predicted and observed flow. The model performance results for this study were consistent with findings from prior research projects carried out in the upper Awash River basin [ 25 ]. Fig.…”
Section: Resultssupporting
confidence: 88%
“…R 2 , NSE and percent bias during calibration for the 2005 LULC data were 0.81, 0.68, and −66.18, respectively ( Table 5 ). The model performance result is better than the previous study results in this area [ 25 ].…”
Section: Resultscontrasting
confidence: 78%
“…Similar findings have also been reported in other studies conducted in different parts of Ethiopia. For instance, Boru et al (2022) [ 25 ] reported that the average annual sediment yield of the Melka Werer watershed is 21.43 t/ha/year. According to Kidane et al (2019) [ 71 ], the mean annual soil erosion rate of the Guder watershed ranges between 25 and 30 t/ha/year.…”
Section: Discussionmentioning
confidence: 99%
“…According to Ref. [ 25 ], the average annual sediment product entering the Koka Dam reservoir is 21.43 t/ha/yr. 106,352.59 tons of average annual sediment output entered to the Merti intake structure, which was built in the Awash River [ 26 ].…”
“…Effective natural resource management is vital for boosting productivity of agricultural land and prevention of soil erosion [22]. Nowadays, there are many management options available [23], but in order to make the best selections, it is necessary to evaluate each option's operational success. The SWAT model can help evaluate various SC practices, such as terraces, filter strips, contouring, and grassed waterways [23].…”
Soil conservation (SC) is essential to maintain the reservoir service life and increase the yield since soil erosion is a major global concern that adversely affects not only the storage capacity but also the land fertility. This study evaluates the spatio-temporal variation of soil erosion using the popular SWAT model and identifies the best SC practice for Tekeze watershed located in the Northern part of Ethiopia. To accomplish this, four soil conservation management scenarios involving baseline, terracing, contouring, and grassed waterway scenarios are selected for soil loss evaluation. The SWAT model was calibrated and validated with R2 values of 0.7 and 0.9 and NSE values of 0.8 and 0.7, respectively, indicating satisfactory model performance. Five sub-basins of the catchment were found to be more susceptible to erosion with an average annual soil loss of 25.15 tons/ha/yr. Employment of the proposed SC measures in the sub-watershed erosion was reduced by 35.18%, 27.11%, and 18.76%, respectively, which is significant when compared with the baseline scenario. Since the investment cost of execution of an SC measure in a large watershed is very high, priority areas are also identified for cost savings as well as improved work efficiency.
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