Soil erosion characteristics of ditch banks during reclamation of a saline/sodic soil in a coastal region of China: Field investigation and rainfall simulation

She, Dongli; Fei, Yuanhang; Liu, Zhipeng; Liu, Dongdong; Shao, Guangcheng

doi:10.1016/j.catena.2014.05.010

Cited by 43 publications

(20 citation statements)

References 27 publications

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“…This low-lying flat area is located beside the Yellow Sea and the altitude only ranges between 3.5 and 4.5 m above mean sea level. It is dominated by a subtropical moist monsoon climate having a mean annual rainfall of 1026 mm, 68% of which falls between May and September (She et al, 2014a). The mean daily temperature is 14.8°C, and the annual potential evapotranspiration is 1343.5 mm.…”

Section: Soil Materialsmentioning

confidence: 99%

“…Given the region's abundant rainfall and the high soil sodium salinity, these slopes are highly erodible and unstable, which potentially leads to their collapse. The conditions for erosion from these slopes differ to some extent from those on other types of soil slope (She et al, 2014a). Thus, more information is needed in order to understand the erosion processes that occur on these slopes that are related to splash and overland flow transport under different conditions of rainfall intensity and slope gradient.…”

Section: Introductionmentioning

confidence: 98%

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Rainfall intensity and slope gradient effects on sediment losses and splash from a saline–sodic soil under coastal reclamation

Liu

She

et al. 2015

CATENA

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Section: Soil Materialsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Rainfall intensity and slope gradient effects on sediment losses and splash from a saline–sodic soil under coastal reclamation

Liu

She

et al. 2015

CATENA

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“…The mean annual rainfall at Dongling Farm is 1026 mm. The soil reported by She et al () has the exchangeable sodium percentage (ESP) of 68.9. A slope value of 15° was determined in their study.…”

Section: Resultsmentioning

confidence: 99%

Sodicity effects on hydrological processes of sodic soil slopes under simulated rainfall

Liu

She

2017

Hydrological Processes

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Soil salinization can occur in many regions of the world. Soil sodicity affects rainfall‐runoff relationships and related erosion processes considerably. We investigated sodicity effects on infiltration, runoff and erosion processes on sodic soil slopes for two soils from China under simulated rainfall. Five sodicity levels were established in a silt loam and a silty clay with clay contents of 8.5% and 46.0%, respectively. The soils, packed in 50 cm × 30 cm × 15 cm flumes at two slope gradients (22° and 35°), were exposed to 60 min of simulated rainfall (deionized water) at a constant intensity of 125 mm h−1. Results showed that, for both soils, increasing soil sodicity had some significant effects on hydrological processes, reducing the infiltration coefficient (pr = −0.69, P < 0.01) and the quasi‐steady final infiltration rate (pr = −0.80, P < 0.01), and increasing the mean sediment loss (pr = 0.39, P < 0.05); however, it did not significantly affect the cumulative rainfall to ponding (P > 0.05). Moreover, increasing sodicity significantly increased the Reynolds number and the stream power (pr = 0.78 and 0.66, P < 0.01, respectively) of the runoff, decreased Manning roughness and Darcy–Weisbach coefficient (pr = −0.52 and −0.52, P < 0.05, respectively), but did not significantly affect the mean flow velocity, mean flow depth, Froude number and hydraulic shear stress. Stream power was shown to be the most sensitive hydraulic variable affecting sediment loss for both soils. Furthermore, as sodicity increased, the values of critical stream power decreased for both the silt loam (R2 = 0.29, P < 0.05) and the silty clay (R2 = 0.49, P < 0.05). The findings of this study were applied to a real situation and identified some negative effects that can occur with increasing sodicity levels. This emphasized the importance of addressing the influences of soil sodicity in particularly high risk situations and when predicting soil and water losses.

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“…Some fundamental research on soil salinization was carried out in China, including properties and evolution of secondary saline soils in different regions and under variable natural conditions, basic characteristics and regional distribution of different saline soils (She et al, 2014), saline soil classification (Zeng, 1985), anthropogenic impacts on soil salinization and the saline-alkali soil survey and mapping (Tao et al, 2013). The following section elaborates the improvement technologies and the measures for salt-affected soil in the coastal areas of China.…”

Section: Integrated Technology Of Efficient Agricultural Utilization mentioning

confidence: 99%

Developing and sustainably utilize the coastal mudflat areas in China

Long

Liu

Shao

et al. 2016

Science of The Total Environment

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Soil erosion characteristics of ditch banks during reclamation of a saline/sodic soil in a coastal region of China: Field investigation and rainfall simulation

Cited by 43 publications

References 27 publications

Rainfall intensity and slope gradient effects on sediment losses and splash from a saline–sodic soil under coastal reclamation

Rainfall intensity and slope gradient effects on sediment losses and splash from a saline–sodic soil under coastal reclamation

Sodicity effects on hydrological processes of sodic soil slopes under simulated rainfall

Developing and sustainably utilize the coastal mudflat areas in China

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