Constructions of an evaluation framework for soil and water conservation techniques

Luo, Han; Hu, Xiaoning; Xie, Yanzhou; Wang, Jijun; Guo, Mancai

doi:10.1016/j.catena.2019.104378

Cited by 5 publications

(2 citation statements)

References 41 publications

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“…In addition, the intensity of disturbance from human activities is high [28]. Since 1957, when the provisional soil and water conservation policies was promulgated, soil conservation has gradually received attention from all parts of society in China [29][30][31]. Systematically managing mountains, water, forests, fields, lakes, grassland, and sands and strengthening the integrated management of regional soil erosion are crucial subjects of current policies [32].…”

Section: Introductionmentioning

confidence: 99%

Influence of Landscape Pattern Evolution on Soil Conservation in a Red Soil Hilly Watershed of Southern China

Xie

Wang

et al. 2023

Sustainability

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The Tingjiang Watershed is a typical mountainous area with red soil in the south of China. Due to the high rainfall intensity, significant cultivated land expansion, and accelerated urbanization, ecological problems such as soil erosion are prominent in the study area. Based on the land use, precipitation, digital elevation model (DEM), normalized difference vegetation Index (NDVI), and soil types in 2000, 2010, and 2020, the landscape pattern and soil conservation in the Tingjiang Watershed were assessed at the sub-watershed scale. The spatial correlation between soil conservation and landscape pattern was analyzed using GeoDA software. The results show the following: (1) From 2000 to 2020, the total amount of soil conservation decreased by 4.15 × 108 t. In terms of spatial analysis, the amount of soil conservation in the Tingjiang Watershed showed an upward and then downward trend in the north and a downward trend in the south, with the most obvious downward trend in the southeast and the northeast. (2) Fragmentation of the overall landscape pattern in the Tingjiang Watershed has increased. The discrete degree and homogeneity of patches decreased in Changting County, while landscape heterogeneity and homogeneity increased in Shanghang, Liancheng, and Yongding Counties. (3) Soil conservation was significantly correlated with the landscape indices patch density (PD), landscape shape index (LSI), mean patch area (AREA_MN), patch cohesion index (COHESION), splitting index (SPLIT), and Shannon evenness index (SHEI). Sub-watersheds with low soil conservation had landscape splitting index, landscape dispersion, patch type richness, and boundary complexity. These areas were mainly distributed in the southern part of the watershed. Sub-watersheds with higher soil conservation were characterized by low patch fragmentation and strong connectivity of dominant patches, which were mainly located in the northern part of the watershed. (4) The spatial error model (SEM) fit better in 2000, 2010, and 2020 compared with the spatial lag model (SLM) and ordinary least squares regression (OLS). The diagnostic results of the SEM model show that among the six landscape indices, PD, SHEI, and AREA_MN are the main influencing factors affecting soil conservation in the watershed to different degrees. The purpose of this study was to investigate the response state of soil conservation capacity as landscape patterns evolve in the Tingjiang Watershed, with the goal of providing a reference for landscape planning and management as well as soil erosion management in the watershed.

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Section: Introductionmentioning

confidence: 99%

Influence of Landscape Pattern Evolution on Soil Conservation in a Red Soil Hilly Watershed of Southern China

Xie

Wang

et al. 2023

Sustainability

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“…Gully is an independent system, and each gully has its unique morphological characteristics, due to various environment factors (topography, soil, vegetation) of catchment. The characteristics of channel directly affect the suitability, implementation and cost of RWH systems [22,26]. However, in most scholarly evaluation systems, the characteristics of channels were often ignored.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Development of Arid Rangelands and Managing Rainwater in Gullies, Central Asia

Zhang

Aikebaier

et al. 2020

Water

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Along with the global climate change, gully erosion, flood and drought jointly restrict the sustainable development of arid rangeland in Central Asia. Rainwater harvesting (RWH) system in gully is a flexible practice that alleviate complex environmental problems. In the Kulusitai watershed of Xinjiang, China, our study presented a decision-making system using GIS combined with multi-criteria analysis and a field survey to identify suitability of gully for RWH. The results showed that nearly 40% of rangeland belonged to high runoff potential area, and gullies as the runoff collection channel became the potential site of RWH. The selection of RWH systems depended on catchment environment and gully characteristics. Therefore, based on the unique natural conditions of Xinjiang and successful RWH cases in other regions, we discussed some suitable low-cost RWH techniques to restore degraded grassland and promote community development. Our study will provide some suggestions for ecological restoration and pasture management in arid regions of Central Asia.

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Effects of Different Land Uses and Slope on Runoff and Soil Loss on the Loess Plateau of China

Cui,

Li,

Zhang

et al. 2024

Land Degrad Dev

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The Loess Plateau has one of the most serious areas of soil erosion in China; therefore, studying the effect of soil and water conservation measures on the erosion of loess soil slopes is important for land management and agricultural development. This study is based on 5 years of field runoff observations and rainfall data from 2015 to 2019. Correlation and regression analyses were used to study the runoff and sediment production of loess soil and its relationship with rainfall, slope and land use. The results show that > 80% of the erosive rainfall occurs mainly in July to August in the area. Runoff and soil loss from the plots differed substantially, depending on land use, soil conservation measures and slope degree. Bare plots experienced the highest soil loss rate of over 27 t/ha with higher runoff depth, followed by cultivated plots (4.55 t/ha), grass plots (0.43 t/ha), shrub plots (0.35 t/ha) and forest plots (0.13 t/ha). Among the four soil and water conservation measures, the runoff and sediment reduction benefits of forest and shrub plots were the highest. The runoff reduction benefit fluctuated at approximately 0.8, and the benefit of sediment reduction was ≈1. The overall performance was forest > shrubland > grassland > cultivated land > bare land, and the benefits of sediment reduction were greater than those of runoff reduction. Forests had the highest soil retention capacity on slopes from 5° to 25°, and forests on gentle slopes had the best water storage capacity. Shrub plots had the best water storage capacity when they were on steep slopes. Rainfall erosion forces were significantly and positively correlated (p < 0.01) with runoff depth and soil loss, making it the most significant rainfall indicator of sediment production. Under the same rainfall conditions, soil and water conservation measures are still required on bare slopes, land use is the main control factor for slope sediment production, and appropriate land use can greatly reduce the threat of slopes in terms of soil erosion. This study shows that soil and water conservation measures are imperative to prevent runoff and soil loss, especially for bare land without any measures; on steep slopes, a vegetation combination primarily featuring shrubs is expected to achieve greater benefits in reducing runoff and sediment. This study can provide a scientific basis for the management of vegetation measures and the implementation of soil and water conservation measures on loess soil slopes.

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Constructions of an evaluation framework for soil and water conservation techniques

Cited by 5 publications

References 41 publications

Influence of Landscape Pattern Evolution on Soil Conservation in a Red Soil Hilly Watershed of Southern China

Influence of Landscape Pattern Evolution on Soil Conservation in a Red Soil Hilly Watershed of Southern China

Sustainable Development of Arid Rangelands and Managing Rainwater in Gullies, Central Asia

Effects of Different Land Uses and Slope on Runoff and Soil Loss on the Loess Plateau of China

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