Variable scale effects on hillslope soil erosion during rainfall-runoff processes

Wu, Songbai; Chen, Li; Wang, Ninglian; Zhang, Jin; Wang, Siqiang; Bagarello, Vincenzo; Ferro, Vito

doi:10.1016/j.catena.2021.105606

Cited by 20 publications

(4 citation statements)

References 74 publications

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“…Furthermore, the upper runoff and sediment from the hilly slope have a great impact on the soil erosion of the lower gully slope [ 3 ]. The scale effect on soil erosion at slope scale is variable and dynamic [ 12 , 33 , 34 ]; however, at larger scales, the presence of base flow was assumed to be responsible for the change of the flow–sediment relationship, which favored the occurrence of hyper-concentration flow. The influence of upstream sediment-laden flow on downstream output was limited, and spatial scale effects on sediment-laden flow decreased with the increasing drainage area, especially for major sediment-producing events with area-specific sediment yield larger than 300 t/km 2 [ 31 , 35 ].…”

Section: Discussionmentioning

confidence: 99%

The Spatiotemporal Characteristics of Flow–Sediment Relationships in a Hilly Watershed of the Chinese Loess Plateau

Wang

Yao

Xiao

et al. 2022

IJERPH

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The flow–sediment relationship is important to understand soil erosion and sediment transport in severely eroded areas, such as Loess Plateau. Previous research focused on the variation and driving forces of runoff and sediment at the different scales in a watershed. However, the variations of the flow–sediment relationship on multispatial scales (slope, subgully, gully, and watershed scales) and multitemporal scales (annual, flood events, and flood process) were less focused. Taking the Peijiamao watershed, which includes whole slope runoff plot (0.25 ha, slope scale), branch gully (6.9 ha, subgully scale), gully (45 ha, gully scale), and watershed (3930 ha, watershed scale), four different geomorphic units located at the Chinese Loess Plateau, as the research site, a total of 31 flood events from 1986 to 2008 were investigated, and two flood process data were recorded across all the four geomorphic units. The results showed that on the annual timescale, the average sediment transport modulus and runoff depth at four scales exhibited a linear relationship, with determination coefficients of 0.81, 0.72, 0.74, and 0.77, respectively. At the flood event timescale, the relationships between sediment transport modulus and runoff depth at the gully and watershed scales could also be fitted with a linear relationship with high determination coefficients (from 0.77 to 0.99), but the determination coefficient at the slope scale was only 0.37 at the event scale. On the single rainfall event timescale, the flow–sediment relationship at the slope scale showed a figure-eight hysteretic pattern while those relationships at larger scales showed an anticlockwise loop hysteretic pattern. Under the same flow condition, the suspended sediment concentrations during the falling stage were significantly higher than those during the rising stage. Moreover, the difference was bigger as the spatial scale increased due to the wash loads in the downstream gullies, which favored the occurrence of hyper-concentration flow. The results of the study could provide useful insights into the temporal–spatial scale effects of sediment transport and their internal driving mechanisms at the watershed scale.

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Section: Discussionmentioning

confidence: 99%

The Spatiotemporal Characteristics of Flow–Sediment Relationships in a Hilly Watershed of the Chinese Loess Plateau

Wang

Yao

Xiao

et al. 2022

IJERPH

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“…It also allows analyses related to hydrological processes [46], land management and climate change [47,48]. Other simulations have been performed directly on reconstructions of hydrographic basins in miniature or in experimental sites [49][50][51].…”

Section: Models For Erosion Estimationmentioning

confidence: 99%

Assessing Soil Erosion by Monitoring Hilly Lakes Silting

et al. 2022

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Soil erosion continues to be a threat to soil quality, impacting crop production and ecosystem services delivery. The quantitative assessment of soil erosion, both by water and by wind, is mostly carried out by modeling the phenomenon via remote sensing approaches. Several empirical and process-based physical models are used for erosion estimation worldwide, including USLE (or RUSLE), MMF, WEPP, PESERA, SWAT, etc. Furthermore, the amount of sediment produced by erosion phenomena is obtained by direct measurements carried out in experimental sites. Data collection for this purpose is very complex and expensive; in fact, we have few cases of measures distributed at the basin scale to monitor this phenomenon. In this work, we propose a methodology based on an expeditious way to monitor the volume of hilly lakes with GPS, sonar sensor and aquatic drone. The volume is obtained by means of an automatic GIS procedure based on the measurements of lake depth and surface area. Hilly lakes can be considered as sediment containers. Time-lapse measurements make it possible to estimate the silting rate of the lake. The volume of 12 hilly lakes in Tuscany was measured in 2010 and 2018, and the results in terms of silting rate were compared with the estimates of soil loss obtained by RUSLE and MMF. The analyses show that all the lakes measured are subject to silting phenomena. The sediment estimated by the measurements corresponds well to the amount of soil loss estimated with the models used. The relationships found are significant and promising for a distributed application of the methodology, which allows rapid estimation of erosion phenomena. Substantial differences in the proposed comparison (mainly found in two cases) can be justified by particular conditions found on site, which are difficult to predict from the models. The proposed approach allows for a monitoring of basin-scale erosion, which can be extended to larger domains which have hilly lakes, such as, for example, the Tuscany region, where there are more than 10,000 lakes.

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“…Existem fatores facilitadores da erosão intrínsecos ao ambiente, como a topografia. Neste sentido, vale a atenção a setores com elevada inclinação, os quais podem tornar processos como o escoamento laminar críticos do ponto de vista erosivo (Borrelli et al, 2020;Gil et al, 2021;Wu et al, 2021;Zhang et al, 2019;Zhao et al, 2022). Cabecauer e Hofirka (2008) destacam o aumento da ocorrência de processos erosivos em áreas de alta declividade na Eslováquia, fato acarretado após a conversão de florestas em espaços agricultáveis, caracterizando uma típica interferência humana no sistema.…”

Section: Issn:1984-2295unclassified

A Erosão Linear e Sua Relação com a Morfometria do Relevo na Alta Bacia do Rio Capivara – Botucatu (SP)

Bonzanini

Lupinacci

Stefanuto

2022

Rev. Bras. Geog. Fis.

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A erosão dos solos é um problema frequentemente relatado em todo o globo, o qual compromete a utilização do recurso pedológico, essencial para a reprodução da atividade humana. Para as áreas declivosas, como o caso das Cuestas Basálticas do Estado de São Paulo, este problema pode se tornar ainda maior a partir das características naturais do terreno, que podem funcionar como catalizadoras dos processos erosivos. A partir disto, o objetivo deste artigo é avaliar a interação das feições erosivas lineares com a morfometria do relevo em área de ocorrência de relevo cuestiforme. Para isso, foram elaboradas cartas de declividade, de dissecação vertical, de dissecação horizontal, de energia do relevo e geomorfológica. Foi avaliada a distribuição espacial das feições erosivas lineares, mapeadas na carta geomorfológica, sobre cada classe, de cada carta morfométrica. Assim, constatou-se que na área de estudo, as feições erosivas são condicionadas pela presença do relevo cuestiforme, que fornece energia a ação do escoamento de superfície a partir de suas áreas de front, com os processos erosivos se concentrando em setores de média e de baixa vertente. Por fim, os resultados obtidos auxiliam na compreensão da dinâmica erosivas em áreas de relevo cuestiforme, a partir das características de morfometria do relevo, fornecendo subsídios ao uso adequado da terra e a estudos futuros nesta unidade geomorfológica.Palavras-chave: Erosão. Morfometria do relevo. Relevo de cuestas. Linear erosion and its relationship with reliefmorphometry in the Upper Capivara River Catchment – Botucatu (SP) – Brazil A B S T R A C TSoil erosion is a problem frequently reported all over the globe, which compromises the use of the soil resource, essential for the reproduction of human activity. For sloping areas, as is the case of the basaltic cuestas of the São Paulo State, this problem can become even greater from the natural characteristics of the area, which can work as catalysts of the erosive processes. From this, the objective of this paper is to evaluate the interaction of linear erosive features with the morphometry of the relief in an area where a cuesta relief. To this end, slope, vertical dissection, horizontal dissection, relief energy and geomorphologic maps were elaborated. The spatial distribution of linear erosive features, mapped in the geomorphologic map, was evaluated on each class of each morphometric map. In the study area, the erosive features are conditioned by the presence of the cuesta relief, which provides energy to the action of surface runoff from its front areas, with erosive processes concentrated in sectors of medium and low slope. Finally, the results help in the understanding of the erosive dynamics in areas of cuesta relief, based on the morphometric characteristics of the relief, providing subsidies for the appropriate use of land and future studies in these locations.Keywords: Erosion. Reliefmorphometry. Cuestas relief.

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Variable scale effects on hillslope soil erosion during rainfall-runoff processes

Cited by 20 publications

References 74 publications

The Spatiotemporal Characteristics of Flow–Sediment Relationships in a Hilly Watershed of the Chinese Loess Plateau

The Spatiotemporal Characteristics of Flow–Sediment Relationships in a Hilly Watershed of the Chinese Loess Plateau

Assessing Soil Erosion by Monitoring Hilly Lakes Silting

A Erosão Linear e Sua Relação com a Morfometria do Relevo na Alta Bacia do Rio Capivara – Botucatu (SP)

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