Effects of changes in land use and land cover on sediment discharge of runoff in a typical watershed in the hill and gully loess region of northwest China

Zhang, Xiaoming; Xiao, Yu; Wu, Sihong; Cao, Wenda

doi:10.1007/s11461-008-0056-1

Cited by 4 publications

(4 citation statements)

References 15 publications

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“…Land-use change also markedly affects soil organic carbon through its effect on humification, decomposition, and mineralization of soil organic matter, which in turn influences the rate of soil loss because organic matter increases soil cohesion and water retention (Basaran et al 2007). Therefore, by properly adjusting land-use patterns, soil properties can be greatly improved and runoff and soil erosion rates can be reduced (Zhang et al 2008).…”

Section: Communicated By Diana Sietzmentioning

confidence: 99%

Future soil loss in highland Ethiopia under changing climate and land use

et al. 2020

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Soil erosion caused by climate and land-use changes is one of the biggest environmental challenges in highland Ethiopia. The aim of this study was to assess the future soil erosion risks and evaluate the potential conservation measures in the Rib watershed, northwestern highland Ethiopia. We used the HadGEM2-ES model with a moderate greenhouse gas (GHG) concentration scenario (RCP4.5) to project the future climate. The future land-use patterns were predicted using the CA-Markov model. We integrated the RUSLE model with GIS to estimate the spatial distribution of soil loss and identify erosion risk areas. We found that the Rib watershed is highly vulnerable to future climate and land-use changes, leading to a high soil erosion risk. Despite slight growth of forest cover during the study period, the total soil loss for the watershed was estimated to be 7.93 × 10 6 t year −1 in 2017 and was predicted to increase to 9.75 × 10 6 t year −1 in 2050, an increase of about 23%. The increase in forest cover was due to the expansion of the area of eucalyptus plantations which are more prone to erosion. Moreover, field survey showed that the residual native forests are sparsely vegetated and mostly used for cattle grazing, increasing the erosion risk even more. In contrast, the combined use of afforestation with native trees and physical soil conservation measures in the upper areas of the catchment could decrease soil loss by 62%. Our results stress the importance of combining soil conservation measures, including converting eucalyptus plantations to native forests, to mitigate the effects of future climate change and increased agricultural production on soil erosion.

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Section: Communicated By Diana Sietzmentioning

confidence: 99%

Future soil loss in highland Ethiopia under changing climate and land use

et al. 2020

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“…The primary land uses are forest, cultivated land, and residential areas. The land has become seriously degraded due to long-term soil erosion and the development of a high gully density (the length of channel in per unit area), at approximately 3.5 km km −2 [53]. The mean topographic wetness index (TWI) in the Loess Plateau is 4.2 [54].…”

Section: Study Areamentioning

confidence: 99%

“…Annual runoff (R, m 3 yr −1 ) and annual sediment (S, t yr −1 ) were obtained from the literature [52,55,56], and the records from the Tianshui Soil Erosion Experimental Station. The restoration practices in the restored watershed were determined from article analysis [52,53,57,58].…”

Section: Data Sourcesmentioning

confidence: 99%

The Effects of Restoration Practices on a Small Watershed in China’s Loess Plateau: A Case Study of the Qiaozigou Watershed

Qinghong

Zhen

2020

Sustainability

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Soil erosion and restoration affect the structure and function of ecosystems and society, and have attracted worldwide attention. Changes in runoff and sediment transport after restoration practices in China’s Loess Plateau have been widely studied and many valuable results have been reported. However, this research was mainly conducted in large watersheds, and quantified the effects of restoration practices through the restoration period. In this study, we compared two adjacent watersheds (one restored and the other natural) in a hill and gully region of China’s Loess Plateau to reveal the impacts of restoration practices. We collected annual rainfall, runoff, and sediment transport data from 1988 to 2018, then investigated temporal variation of runoff and sediment transport to examine their relationships with rainfall. We also calculated the retention rate of soil and water under the restoration practices. The restored watershed showed a significantly decreased sediment modulus (the amount per unit area); the natural watershed showed no significant change. In addition, the restored watershed had lower runoff and sediment modulus values than the natural watershed, with greater effectiveness as rainfall increased. Revegetation and terrace construction contributed more to the retention of soil and water (65.6 and 69.7%, respectively) than check dams (<10%). These results improve our understanding of the effects of restoration practices, and provide guidance on ways to preserve soil and water through restoration in a small watershed in the Loess Plateau.

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“…Land unit is the smallest unit in watershed management, based on the characteristics of the land unit can be a reference or recovery efforts and maintain it. Zhang et al (2008) suggested that the unit of land in a watershed is generally regarded as a development unit which rely on the availability of water. Hernandez-Ramirez, (2008) suggested that the planning of land use and management using the watershed as the management unit.…”

Section: Land Unitmentioning

confidence: 99%

Power Recovery Support Tabunio Watershed Based on Analysis of Erosion Based on Geographic Information System in the Province of South Kalimantan

Kadir¹,

Badaruddin²,

Nurlina³

et al. 2017

Mediterranean Journal of Social Sciences

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Watershed Tabunio is one of the watershed in the Province of South Kalimantan which has an important role to support the environmental aspects and socio-economic aspects, it is caused by the upstream part of the watershed there are different types of land use can increase the rate of erosion, the flow surface, also on the middle and downstream utilized by the Tanah Laut for agriculture, plantation and fisheries. This study aims to determine the level of erosion, which is useful as a reference for determining the direction of land use for the carrying capacity of watershed restoration efforts Tabunio. This research method using a regional approach ecological watershed analysis process and presentation done spatially through Geographic Information Systems. The results showed that: a) Amount highest erosion 219,08 ton/ha/yr on Land Unit 3B (mining land use with a gradient of 3-8%), while the lowest amount of erosion 11,44 ton/ha/yr on Land Unit 8 (use secondary dry forest with gradients of 25-40%); b) The level of erosion is very light Danger land unit 8 on the use of secondary dry forest on the slope of 25-40%), while other land units at the rate of moderate to severe erosion. Recovery of the carrying capacity of the watershed Tabunio lower the rate of erosion through soil and water conservation vegetatively and civil engineering (mechanical).

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Effects of changes in land use and land cover on sediment discharge of runoff in a typical watershed in the hill and gully loess region of northwest China

Cited by 4 publications

References 15 publications

Future soil loss in highland Ethiopia under changing climate and land use

Future soil loss in highland Ethiopia under changing climate and land use

The Effects of Restoration Practices on a Small Watershed in China’s Loess Plateau: A Case Study of the Qiaozigou Watershed

Power Recovery Support Tabunio Watershed Based on Analysis of Erosion Based on Geographic Information System in the Province of South Kalimantan

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