Assessment of rainfall-induced soil erosion rate and severity analysis for prioritization of conservation measures using RUSLE and Multi-Criteria Evaluations Technique at Gidabo watershed, Rift Valley Basin, Ethiopia

Guduru, Jerjera Ulu; Jilo, Nura Boru

doi:10.1016/j.ecohyd.2022.09.002

Cited by 10 publications

(7 citation statements)

References 81 publications

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“…On the contrary, most of the sub-basins in the western and northern part experienced low to high soil loss. The results are consistent with Dananto et al [47]; Adi et al [48]; Guduru and Jilo [38]. 35 sub-basins (Figure 7), sub-basins 6, 19, 25, 27, 29, 30, 33, 34 and 35 will generate the highest amount of surface runoff and sediment yield in to the future (S13, S15, S18 and S20); thus, they were categorized under critical sub-basins.…”

Section: Identification Of Soil Erosion Hotspotssupporting

confidence: 89%

“…Hence, the average annual soil loss of GRB was classified into five sediment severity classes (Table 5). The classes were adapted from Dananto et al [47]; Guduru and Jilo [38]. Table 5 indicated that most (>77%) of the study area experienced high to severe soil erosion rate in a given scenario.…”

Section: Identification Of Soil Erosion Hotspotsmentioning

confidence: 99%

“…The basin has been subjected to substantial landscape alteration, climatic variability and drastic ecological change [27][28][29][30][31][32]. These changes, triggered by dynamic population growth, exacerbate soil erosion, excessive sedimentation and eutrophication of waterbodies, hydrological imbalance and land-water-energy-food nexus resource degradation in the basin [33][34][35][36][37][38]. The explicit quantification of spatial and temporal trends of land degradation and its trajectory help to achieve LDN [15].…”

Section: Introductionmentioning

confidence: 99%

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Integrated Modeling of Land Degradation Dynamics and Insights on the Possible Future Management Alternatives in the Gidabo River Basin, Ethiopian Rift Valley

Girma,

Moges,

Fürst

2023

Land

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Land degradation is a pivotal environmental concern, bearing substantial impacts in the Gidabo river basin (GRB) in Ethiopia, prompting a critical need for effective mitigation strategies. In this study, we aimed to assess the dynamics of land degradation pathways in the context of change in climate and land use. The identification of potential erosion hotspots and the appraisal of management strategies was also carried out. The Soil and Water Assessment Tool (SWAT) and the Good Practice Guidance (GPG) framework was employed. The results revealed a compelling synergy between land use dynamics and climate changes, asserting joint and individual prevalence in influencing surface runoff and sediment yield. The past simulation revealed 4–5.9% and 24–43% increments in mean annual runoff and sediment yield, respectively. While the near (2021–2040) and mid (2041–2060) future scenarios displayed varying trends under RCP4.5 and RCP8.5. Furthermore, sub-basins prone to soil erosion risk were identified, thereby enabling targeted conservation efforts. The assessment of trends in land degradation neutrality (LDN) unveiled the expansion of land degradation trajectories (by 26%) from 1985–2003 to 2003–2021. This might be attributed to the dynamic interplay between climate and land use land cover (LULC) change, with croplands and bare land emerging as high-risk degraded areas. Addressing these concerns, soil/stone bund, terracing, contour farming, and reforestation practice can significantly reduce the annual sediment yield in the future. The integration of soil erosion indicators with LDN sub-indicators can provide a more comprehensive approach that can lead to more effective land management and restoration strategies to achieve the LDN goal. The findings of this study could contribute crucial insights and substantial implications for policymakers, land managers, and conservationists. Moreover, future efforts should be directed to expand investigations into diverse land degradation pathways and mitigation measures.

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Section: Identification Of Soil Erosion Hotspotssupporting

confidence: 89%

Section: Identification Of Soil Erosion Hotspotsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Integrated Modeling of Land Degradation Dynamics and Insights on the Possible Future Management Alternatives in the Gidabo River Basin, Ethiopian Rift Valley

Girma,

Moges,

Fürst

2023

Land

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“…Watershed is the basic hydrological response unit, an ideal spatial scale for studying soil and water losses, and the fundamental unit for managing ecological environments. Studies on soil erosion at the watershed scale have focused on estimating soil erosion and sediment (Cao et al , 2022;Galdies et al , 2022;Lufira et al , 2022), assessing erosion susceptibility (Pandey et al , 2021;Tahouri et al , 2022;Tesema, 2022;Wang et al , 2022), and analyzing the factors affecting soil erosion (Aneseyeeet al , 2020;Choudhury et al , 2022;Guduru and Jilo, 2022;Zhao et al , 2022). However, most scholars chose typically representative ephemeral gullies or slopes as research objects to analyze changes in ephemeral gullies (Capra et al, 2009;Karydas and Panagos, 2020;Li et al, 2016;Wang et al 2021b;Zheng et al, 2006), but typical ephemeral gullies or slopes do not fully display changes in ephemeral gullies at a watershed scale.…”

Section: Introductionmentioning

confidence: 99%

Evolution and Development of Ephemeral Gully Erosion in Hilly and Gully Region of the Loess Plateau in China

Liu

Zhang

Yin

et al. 2023

Preprint

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Ephemeral gully erosion is a primary mode of soil erosion that is highly visible, affecting soil productivity and restricting land use. Watershed is the basic unit of soil erosion control; existing research has focused on several typical ephemeral gullies or slopes, which do not fully display changes in ephemeral gullies at a watershed scale. This study analyzed the spatial-temporal evolution and development rate of ephemeral gully erosion at the watershed scale on the Loess Plateau from 2009 to 2021 using remote sensing images (0.5 m resolution), unmanned aerial vehicles (UAV), and field investigations. The results revealed that: (1) most ephemeral gullies occurred in southwestern parts of the watershed, with many hills and large slope gradients; (2) average growth rates of each ephemeral gully frequency, length, density, dissection degree, and width were 2.87 km y , 1.66 m y , 0.12 km km y , 0.0125% y , and 0.04 m y , respectively; (3) ephemeral gully erosion volume ( V) and length ( L) had a good power function relationship: V = 0 . 0842 L 1 . 1932 ( R 2 = 0 . 80 ) . The root mean square error (RMSE) and coefficient of determination (R ) between the measured and predicted ephemeral gully volumes suggest that the V–L relationship has a good predictive ability for ephemeral gully volume. Thus, the V–L model was used to evaluate the development rate of ephemeral gully erosion volume in small watersheds from 2009 to 2021, revealing an average value of 743.20 m y . This study proposed a feasible model for assessing ephemeral gully volume and volume changes at a watershed scale using high-resolution remote sensing images, providing a reference for understanding the development of ephemeral gully erosion in small watersheds over time.

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“…As a basic hydrological response unit, the watershed provides an ideal spatial scale for studying soil and water losses and is a fundamental unit for managing ecological environments. Studies on soil erosion at the watershed scale have focused on estimating soil erosion and sediment (Cao et al, 2022; Galdies et al, 2022; Lufira et al, 2022), assessing erosion susceptibility (Pandey et al, 2021; Tahouri et al, 2022; Tesema, 2022; Wang et al, 2022), and analyzing the factors affecting soil erosion (Aneseyee et al, 2020; Choudhury et al, 2022; Guduru & Jilo, 2022; Zhao et al, 2022); however, these studies often chose typical ephemeral gullies or slopes as research objects to analyze changes in ephemeral gullies (Capra et al, 2009; Karydas & Panagos, 2020; Li et al, 2016; Wang, Zhang, et al, 2021; Zheng et al, 2006), which may not fully represent the changes occurring at a watershed scale; therefore, there is a need to clarify the temporal and spatial development processes of ephemeral gullies at the watershed scale, as this can provide valuable insights for determining soil and water conservation practices and understanding the characteristics of each ephemeral gully and other geomorphologic processes related to ephemeral gully erosion.…”

Section: Introductionmentioning

confidence: 99%

Ephemeral gully development in the hilly and gully region of China's loess plateau

Liu,

Zhang,

Yin

et al. 2023

Land Degrad Dev

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Ephemeral gully erosion is a significant form of soil erosion that visibly impacts soil productivity and restricts land use. While watersheds are fundamental for controlling soil erosion, past studies have focused on individual ephemeral gully or slope types, which do not fully represent changes in ephemeral gullies at the watershed scale. This research used remote sensing images (0.5 m resolution), unmanned aerial vehicles (UAV), and field investigations to analyze the spatial–temporal evolution and development rate of ephemeral gully erosion at the watershed scale on the Loess Plateau from 2009 to 2021. Using spatial information and morphological parameters of ephemeral gullies obtained from the SegNet model, we found that: (1) ephemeral gully numbers decreased from 4495 in 1999 to 2312 in 2021 due to improved vegetation coverage; (2) average growth rates of ephemeral gully frequency, length, density, dissection degree, and width were 2.87 km−2 year−1, 1.66 m year−1, 0.12 km km−2 year−1, 0.01% year−1, and 0.04 m year−1, respectively; (3) ephemeral gully erosion volume (V) and length (L) had a good power function relationship: . The root‐mean‐square error (RMSE) and coefficient of determination (R2) between measured and predicted ephemeral gully volumes indicated that the V–L relationship has a good predictive ability for ephemeral gully volume; thus, the V–L model was used to evaluate the development rate of ephemeral gully erosion volume in small watersheds from 2009 to 2021, revealing an average value of 743.20 m3 year−1. This study presents an empirical model for assessing ephemeral gully volume and volume changes at a watershed scale using high‐resolution remote sensing images, providing a reference for understanding the development of ephemeral gully erosion in small watersheds over time.

show abstract

Assessment of rainfall-induced soil erosion rate and severity analysis for prioritization of conservation measures using RUSLE and Multi-Criteria Evaluations Technique at Gidabo watershed, Rift Valley Basin, Ethiopia

Cited by 10 publications

References 81 publications

Integrated Modeling of Land Degradation Dynamics and Insights on the Possible Future Management Alternatives in the Gidabo River Basin, Ethiopian Rift Valley

Integrated Modeling of Land Degradation Dynamics and Insights on the Possible Future Management Alternatives in the Gidabo River Basin, Ethiopian Rift Valley

Evolution and Development of Ephemeral Gully Erosion in Hilly and Gully Region of the Loess Plateau in China

Ephemeral gully development in the hilly and gully region of China's loess plateau

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