Study on the relationship between runoff and sediment yield in rainfall erosion processes in the watershed on Loess Plateau

2020 ◽  
pp. 279-284
Author(s):  
Zhanbin Li ◽  
Wenfeng Ding ◽  
Lingzhou Cui ◽  
Bing Shen
Keyword(s):  
Loess Plateau ◽  
Sediment Yield ◽  
Erosion Processes ◽  
The Relationship ◽  
Runoff And Sediment Yield ◽  
Rainfall Erosion

scholarly journals Response of Variation of Water and Sediment to Landscape Pattern in the Dapoling Watershed

2022 ◽  
Vol 14 (2) ◽  
pp. 678
Author(s):  
Chong Wei ◽  
Zhiqiang Zhang ◽  
Zhiguo Wang ◽  
Lianhai Cao ◽  
Yichang Wei ◽  
...  
Keyword(s):  
Landscape Pattern ◽  
Sediment Yield ◽  
Landscape Heterogeneity ◽  
Swat Model ◽  
Landscape Patterns ◽  
Land Resource ◽  
Low Carbon ◽  
Water And Sediment ◽  
The Relationship ◽  
Runoff And Sediment Yield

The relationship between water-sediment processes and landscape pattern changes has currently become a research hotspot in low-carbon water and land resource optimization research. The SWAT-VRR model is a distributed hydrological model which better shows the effect of land use landscape change on hydrological processes in the watershed. In this paper, the hydrological models of the Dapoling watershed were built, the runoff and sediment yield from 2006 to 2011 were simulated, and the relationship between landscape patterns and water-sediment yield was analyzed. The results show that the SWAT-VRR model is more accurate and reasonable in describing runoff and sediment yield than the SWAT model. The sub-basins whose soil erosion is relatively light are mostly concentrated in the middle reaches with a slope mainly between 0–5°. The NP, PD, ED, SPIIT, SHEI, and SHDI of the watershed increased slightly, and the COHESION, AI, CONTAG, and LPI showed a certain decrease. The landscape pattern is further fragmented, with the degree of landscape heterogeneity increasing and the connection reducing. The runoff, sediment yield and surface runoff are all extremely significantly negatively correlated with forest, which implies that for more complicated patch shapes of forest which have longer boundaries connecting with the patches of other landscape types, the water and sediment processes are regulated more effectively. Therefore, it can be more productive to carry out research on the optimization of water and soil resources under the constraint of carbon emission based on the SWAT-VRR model.

Evidence and Causes of Spatiotemporal Changes in Runoff and Sediment Yield on the Chinese Loess Plateau

2016 ◽  
Vol 28 (2) ◽  
pp. 579-590 ◽  
Author(s):  
Guangju Zhao ◽  
Xingmin Mu ◽  
Juying Jiao ◽  
Zhengfeng An ◽  
Andreas Klik ◽  
...  
Keyword(s):  
Loess Plateau ◽  
Sediment Yield ◽  
Chinese Loess Plateau ◽  
Chinese Loess ◽  
Spatiotemporal Changes ◽  
Runoff And Sediment Yield ◽  
The Chinese Loess Plateau

Land-use changes and check dams reducing runoff and sediment yield on the Loess Plateau of China

2019 ◽  
Vol 664 ◽  
pp. 984-994 ◽  
Author(s):  
Peng Shi ◽  
Yan Zhang ◽  
Zongping Ren ◽  
Yang Yu ◽  
Peng Li ◽  
...  
Keyword(s):  
Land Use ◽  
Loess Plateau ◽  
Sediment Yield ◽  
Land Use Changes ◽  
The Loess Plateau ◽  
Check Dams ◽  
Runoff And Sediment Yield

Landscape Patches Influencing Runoff and Sediment Yield and Flow Hydrodynamics in The Loess Plateau, China

2021 ◽  
Author(s):  
Ruoxiu Sun ◽  
Jianjun Zhang ◽  
Li Ma
Keyword(s):  
Loess Plateau ◽  
Sediment Yield ◽  
The Loess Plateau ◽  
Stream Power ◽  
Patch Type ◽  
Vegetation Patch ◽  
Sediment Yields ◽  
Bare Land ◽  
Vegetation Patches ◽  
Runoff And Sediment Yield

<p>The Loess Plateau is located in arid and semi-arid region, and the fragmentation of vegetation patches is large. However, the combination of vegetation patches to the runoff and sediment yield on the slope is not clear yet. To evaluate the influence of vegetation patch type and number on runoff, sediment and hydrodynamic parameters, this study established field runoff plots with different landscape patch types, including bare land, S-road patches, strip patches, grid patches and random patches, as well as different quantities patches of 5, 10, 15 and 20. The results showed that the runoff yields of the four vegetation patch types decreased by 16.1%–48.7% (p<0.05) compared with that of bare land, whereas sediment yields decreased by 42.1%–86.5% (p<0.05). Also, the resistance coefficients of the poorly connected patch patterns, including strip patches, grid patches and random patches, ranged between 0.2–1.17 times higher than that of the well-connected S-road patch pattern, and the stream power decreased by 33.3%–50.7% (p<0.05). Under a uniform distribution of vegetation patches, the runoff rate and sediment yield decreased significantly with an increased number of patches. Although the increase in the number of vegetation patches also resulted in a decrease inflow shear stress and stream power to different degrees, the differences between the combinations with similar patch numbers were not significant. Besides, the sensitivity of soil to erosion decreased with an increasing number of the patch in the vegetation landscape, whereas the sensitivities of patch combinations with poor connectivity were lower than those with good connectivity. From this perspective, the optimization of vegetation in the Loess Plateau region requires sufficient consideration to reducing the connectivity of vegetation patches and increasing the density of patches.</p>

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