Effect of hillslope topography on soil erosion and sediment yield using USLE model

Sabzevari, T.; Talebi, Ali

doi:10.1007/s11600-019-00361-8

Cited by 26 publications

(19 citation statements)

References 30 publications

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“…However, the mean of Qs and SCs were lower on the straight profile compared to the hillslopes with convex profile because the slopes were more uniform at the beginning and end of the plot in straight profile. These results agree with those found by Sabzevari & Talebi (2019) concerning the high values of SC on convex hillslopes compared to straight and concave ones.…”

Section: Intra-and Inter-storm Variation Of Q and Sc During Css In Chssupporting

confidence: 92%

“…However, on hillslopes with concave and convex profiles in the fourth and fifth events the mean values of SC continued to increased compared to the previous events and formed more complex SRLs than the hillslopes with straight profile. This emphasized the importance of knowing and considering the geometry of CHs in the various hydrological processes and their different effects on the behavior of the components resulting from soil erosion (Talebi et al 2016;Sabzevari & Talebi 2019).…”

Section: Hgs Sgs and Srls During Css In Chsmentioning

confidence: 99%

“…At present, hydrological models are widely used to better understand the influential factors in the hydrological cycle of the watersheds, and these models have applications in many issues related to management of water resources including rainfall-runoff modeling and sediment management. Consequently, recognition of the geometry of hillslopes is vital for the accurate performance of the various models developed for soil erosion (Sabzevari & Talebi 2019). Various studies have been carried out worldwide on the components of sheet erosion, such as surface runoff and soil loss on complex hillslopes (CHs) (Agnese et al 2007).…”

Section: Introductionmentioning

confidence: 99%

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Analysis of sheet erosion component variability on four complex hillslopes and consecutive storms under laboratory conditions

2021

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Understanding of rainfall-runoff processes in arid and semi-arid regions, such as runoff discharge (Q) and sediment concentration (SC) in hillslopes with different geometries, can offer better insights into hydrological processes. Consequently, considering intra- and inter-storm dynamics of Q and SC during consecutive storms (CSs), on hillslopes of various geometric shapes, has not been accurately and scientifically studied. The current research was planned to study the response of the sheet erosion components. The experiments were performed on four complex hillslopes (CHs) including straight-parallel, straight-convergent, concave-convergent, and convex-convergent under five CSs with rainfall intensity of 45 mm/h on a sandy loam soil in a 1 × 2 m2 plot under laboratory conditions. The results showed that the individual effects of the CSs and CHs and their interactive effects on Q and SC were significant (P ≤ 0.00). However, Q was more influenced by the CSs (ηp2 = 0.65) and SC was more affected by the CHs (ηp2 = 0.77). Moreover, analysis of the hydrographs (HGs), sedigraphs (SGs), and sediment rating loops (SRLs) observed in four CHs during five CSs indicated the diversity in the behavior of the SC (from 2.32 to 68.68 g/L) in comparison with variations in Q (from 14.68 to 38.38 mL/s).

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Section: Intra-and Inter-storm Variation Of Q and Sc During Css In Chssupporting

confidence: 92%

Section: Hgs Sgs and Srls During Css In Chsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Analysis of sheet erosion component variability on four complex hillslopes and consecutive storms under laboratory conditions

2021

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“…Perubahan penggunaan/tutupan lahan dan erosivitas limpasan curah hujan memiliki pengaruh yang signifikan terhadap erosi tanah (Fu et al, 2021). Faktor lereng terdiri dari bentuk lereng yang berbeda (konvergen, paralel, dan divergen) dan kelengkungan yang berbeda (lurus, cekung, dan cembung) (Sabzevari & Talebi, 2019).…”

Section: Pendahuluanunclassified

Estimasi Tingkat Bahaya Erosi dengan Menggunakan Metode USLE Pada Daerah Aliran Sungai (DAS) Amandit

et al. 2021

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Abstrak: Erosi tanah menjadi semakin meningkat setiap tahun yang disebabkan oleh terjadinya peningkatan kerusakan lahan. Daerah Aliran Sungai (DAS) Amandit mengalami kerusakan lahan yang ditandai dengan luasnya lahan kritis pada DAS tersebut yang akan berpengaruh pada tingginya tingkat bahaya erosi pada DAS tersebut. Penelitian ini bertujuan untuk menganalisis tingkat bahaya erosi yang terjadi pada Daerah Aliran Sungai (DAS) Amandit. Penelitian ini menggunakan peta bentuklahan sebagai dasar pengambilan sampel. Jumlah sampel dalam penelitian ini adalah 18 buah sampel. Analisa data yang digunakan adalah berdasarkan Metode Universal Soil Loss Equation (USLE) yang digunakan untuk mengetahui tingkat bahaya erosi yang terjadi pada wilayah penelitian. Hasil penelitian menunjukkan tingkat bahaya erosi yang terjadi di Daerah Aliran Sungai (DAS) Amandit termasuk dalam klasifikasi berat-sangat berat. Tingkat bahaya erosi yang paling tinggi adalah 1276.535 ton/ha/tahun. Faktor yang dominan yang mengakibatkan tingkat bahaya erosi pada Daerah Aliran Sungai (DAS) Amandit termasuk dalam klasifikasi berat-sangat berat adalah kemiringan lereng, nilai erodibilitas yang tinggi, dan tutupan lahan. Kata Kunci: Tingkat Bahaya Erosi (TBE), Bentuklahan, USLE, DAS Amandit Abstract: Soil erosion is increasing every year due to increased land degradation. The Amandit Watershed has suffered damage which affects critical land in the watershed which will affect the level of erosion hazard in the watershed. This study aims to analyze the level of erosion that occurs in the Amandit Watershed. This study uses a landform map as a basis for sampling. The number of samples in this study were 18 samples. The data analysis used is based on the Universal Soil Loss Equation (USLE) method which is used to see the level of erosion hazard that occurs in the study area. The results showed that the level of erosion that occurred in the Amandit Watershed was classified as heavy-very heavy. The highest level of erosion was 1276.535 ton/ha/year. The dominant factors resulting in the level of erosion in the watershed (DAS) included in the weight-very weight classification are the slope of the slope, high erodibility values and land cover. Keywords: Erosion Hazard Level, Landform, USLE, Amandit Watershed

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“…Studies have demonstrated that the effects of vegetation and topography on surface runoff are manifested by jointly changing the upslope inflow of a certain slope unit, and these two factors are usually inseparable (Qin et al, 2015). Specifically, aboveground traits of vegetation constitute the main drivers for generating hydraulic roughness (Kervroedan et al, 2019), while the topography is the carrier for the occurrence and development of surface runoff generation (Sabzevari and Talebi, 2019).…”

Section: Introductionmentioning

confidence: 99%

Coupling effects of topography and the spatial distribution of cypress on surface runoff coefficient on a steep forested slope in southwest China

Shi

2020

Preprint

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Interactions between topography and the spatial distribution of cypress give rise to the spatial heterogeneity of surface runoff on steep forested slopes in southwest China. To reduce surface runoff and improve the water conservation capacity of cypress forests, the coupling effects of topography and the spatial distribution of cypress on surface runoff coefficient were studied through the Structural Equation Modeling (SEM) and the Response Surface Method (RSM) based on twelve natural runoff plots. Results showed that the surface runoff coefficient increased monotonically with the increase of the composite index of topography (topographic relief× runoff path density/ surface roughness), and increased first and decreased later with the increase of the composite index of the spatial distribution of cypress (stand density of cypress× contagion index of cypress).To reduce surface runoff coefficient from a larger value (>0.5) to less than 0.3, two strategies of stand structure adjustment could be adopted, including only increasing the stand density of cypress or increasing both the stand density and the contagion index of cypress, and which strategy should be adopted depended on the initial stand density of cypress. When the initial stand density of cypress was relatively low (<20 ind/100m2), the first step was to increase the stand density of cypress, and until the stand density of cypress reached to a moderate level (20-50 ind/100m2), adjusting the spatial structure of cypress from relatively regular to relatively clumped could reduce surface runoff coefficient to a greater extent.

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Effect of hillslope topography on soil erosion and sediment yield using USLE model

Cited by 26 publications

References 30 publications

Analysis of sheet erosion component variability on four complex hillslopes and consecutive storms under laboratory conditions

Analysis of sheet erosion component variability on four complex hillslopes and consecutive storms under laboratory conditions

Estimasi Tingkat Bahaya Erosi dengan Menggunakan Metode USLE Pada Daerah Aliran Sungai (DAS) Amandit

Coupling effects of topography and the spatial distribution of cypress on surface runoff coefficient on a steep forested slope in southwest China

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