Assessment of soil erosion risks in response to land-use and land-cover changes in Coka watershed, Southern Ethiopia

Buraka, Tadele; Elias, Eyasu; Suryabhagavan, K. V.; Lelago, Alemu

doi:10.1080/24749508.2022.2109825

Cited by 11 publications

(7 citation statements)

References 71 publications

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“…Similar to this finding, soil loss in the Huluka watershed was 400 ton/ha/yr [ 31 ]. As a result, agricultural production is declining in the study area due to nutrient loss from topsoil [ 32 ], which adds pollutants to the downstream of Finca'a, Amerti, and Nashe water bodies and causes dam sedimentation [ 21 , 33 , 34 ] and leads to a problem of reservoir erosion, which agrees with studies by Ref. [ 9 ].…”

Section: Discussionsupporting

confidence: 67%

GIS based soil loss assessment using RUSLE model: A case of Horo district, western Ethiopia

Fikadu¹,

Gedefa²

2023

Heliyon

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Section: Discussionsupporting

confidence: 67%

GIS based soil loss assessment using RUSLE model: A case of Horo district, western Ethiopia

Fikadu¹,

Gedefa²

2023

Heliyon

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“…The erosion rates above 10 t ha/year/will not reverse within 100 years (Degife et al, 2021;Kouli et al, 2009). The estimated rate of soil erosion, meanwhile, is lower than that of soil erosion rates in several locations of Ethiopia reported by Mesfin et al (2019) in the Wabe river catchment (165 t/ha/year), Haregeweyn et al (2015) in Anjeni watershed (110 t/ha/year), Jothimani et al (2022) in Kulfo river catchment (68.47 t/ha/year), Gizaw and Degifie (2018), in Gilgel Gibe I catchment (62.98 t/ha/year), Gashaw et al (2018) in Geleda watershed (237 t/ha/ year), Amsalu and Mengaw (2014) in Jabi Tehinan wereda (504.6 t/ha/year), Weldu Woldemariam and Edo Harka (2020) in Erer subwatershed (75.85 t/ha/year), Girma and Gebre (2020) in Omo-Gibe basin (69 t/ha/year), Yesuph and Dagnew (2019) in Beshilo catchment of Blue Nile Basin (37 t/ha/year), Molla and Sisheber (2017) in Koga watershed (30.2 t/ha/year), and Buraka et al (2022) in Coka watershed (62.15 t/ha/year).…”

Section: Soil Erosion Rate Under Different Lulc Changementioning

confidence: 99%

Soil erosion variations along land use and land cover dynamics in Matenchose watershed, Rift Valley Basin, Southern Ethiopia

Mathewos

Tsegaye

Wondrade

2023

Natural Resource Modeling

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The global community recognizes land use and land cover change (LULC) as a primary cause of ecological modification that has a considerable impact on natural resources, particularly soil and water resources. The aim of this research was to investigate land use change's influences on soil erosion in the Matenchose watershed of Ethiopia in 1991, 2003, and 2020. The maximum likelihood classification (MLC) method was used in the study for supervised image analysis. Soil erosion was estimated using the geographic information system (GIS), remote sensing, and the Revised Universal Soil Loss Equation (RUSLE) model. According to the LULC data from 1991, the watershed was mostly covered by grassland (35%), while in 2003 and 2020, it was typically enclosed by cultivated land (36%) and (52%), respectively. The watershed's mean annual soil erosion rate grew significantly from 13 t/ha in 1991 to 18 t/ha in 2003 to 21 t/ha in 2020. Based on the current soil loss rate result, the Matenchose watershed was divided into five priority groups for soil management practices. In contrast, the watershed is made up of 2052 ha (21%) of areas with high to very high erosion risk, 3304 ha (33%) of areas with moderate erosion risk, and 2866 ha (29%) of areas with severe erosion risk. Based on the average annual rate of soil erosion, several vital subwatersheds were identified for potential future land management‐related actions. Over the 29 years, the area of grassland and forest decreased while agricultural and settlement areas expanded, and they contributed to the enhanced hazards of soil erosion. Particularly vulnerable to erosion are the watershed's hilly and steeper areas. The identified subwatersheds that are most at risk of erosion should be given priority for upcoming LULC initiatives, proper participatory watershed planning and management, and measures to conserve soil and water to preserve the Matenchose watershed's soil resources.

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“…Since, the greatest concern for soil degradation is erosion caused by water and the potential for erosion of a speci c soil type largely depends on the severity of the slope, the crops grown, and the number and types of tillage operations [14]. The annual soil loss rate in Northern Ethiopia has been estimated at 25 tons per hectare per year [11] and at 18 tons per hectare in Southern Ethiopia, which is above the acceptable range for the country [25]. Therefore, to combat this challenge, crop residue management, crop rotation, minimized contour tillage, grass waterways, terraces, and conservation structures are some of the approaches.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Conservation Tillage Methods on Soil and Water Conservation, and Yield and Yield Components of Maize (Zea mays L.) in South Ari District, Southern Ethiopia

Handiso,

Hemacho,

Bongido

et al. 2023

Preprint

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Reduced tillage is one of the options to combat land degradation problems. The study aims to evaluate the impacts of tillage practice on selected soil physicochemical properties and soil loss, and maize yield and yield components. Four tillage treatments were evaluated, including zero tillage, two-times tillage, strip tillage, and farmers' practice were laid out in a randomized complete block design with five replications. Then, soil moisture, soil loss, and yield and yield components of maize data were collected. The results on soil moisture and soil loss revealed that conservation tillage methods were conducive to having better soil moisture contents during active crop development and after harvest compared to the conventional methods. The current findings also showed that adopting reduced tillage and zero tillage boosted maize yield and yield components with higher economic benefits to farmers in the long run as compared to strip tillage and conventional tillage. Although zero tillage attributed to less grain yield, it resulted in higher economic benefits to farmers and saved 44.84% soil loss reduction relative to conventional tillage. The economic evaluation result clearly showed that zero tillage, strip tillage and reduced tillage methods are better and recommendable for farmers, but reduced tillage is the best. Hence, farmers can use either zero tillage or reduced tillage, depending on their investment capital. But, to get considerable changes in soil and water balances, other soil physicochemical properties, and crop yields, conducting similar studies for more than two years period at permanent field plots is paramount in the future.

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Assessment of soil erosion risks in response to land-use and land-cover changes in Coka watershed, Southern Ethiopia

Cited by 11 publications

References 71 publications

GIS based soil loss assessment using RUSLE model: A case of Horo district, western Ethiopia

GIS based soil loss assessment using RUSLE model: A case of Horo district, western Ethiopia

Soil erosion variations along land use and land cover dynamics in Matenchose watershed, Rift Valley Basin, Southern Ethiopia

Evaluation of Conservation Tillage Methods on Soil and Water Conservation, and Yield and Yield Components of Maize (Zea mays L.) in South Ari District, Southern Ethiopia

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