Effects of Tillage Erosion on Soil Redistribution in a Purple Soil with Steep Sloping Terraces

Su, Zhengan; Zhang, J. H.

doi:10.1109/icmss.2010.5577125

Cited by 5 publications

(2 citation statements)

References 8 publications

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“…This may be due to the higher vegetation cover of grasslands compared to cultivated land, and the interlaced plant roots in grasslands can inhibit soil erosion [36]. Moreover, the mean soil erosion rate of Longji Rice Terraces is much lower of the steep sloping terraces (56.47 t/(ha•a)) in Zhongxian County of Chongqing [26], the earth-banked terraces (27 t/(ha•a)) in the Yimeng Mountains [56], and the cultivated land (19.4 t/(ha•a)) in Pingguo City of Guangxi [68]. The soil of the steep-slope terraces in Zhongxian County is purple with loose parent rock that easily disintegrates and has faster soil loss.…”

Section: Soil Erosion Ratementioning

confidence: 99%

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First application of plutonium in soil erosion research on terraces

et al. 2023

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The spatial distributions of 239+240Pu and 137Cs in soils from Longji Rice Terraces were investigated to evaluate soil erosion. The activity concentrations of 239+240Pu and 137Cs in the surface soils of the paddy fields were in the range of 0.089–0.734 and 1.80–7.88 mBq/g, respectively. The activities of 239+240Pu and 137Cs showed very similar distribution trends, first increasing and then decreasing with increasing elevation. The 240Pu/239Pu atom ratios in the surface soils ranged from 0.162 to 0.232. The activities of 239+240Pu and 137Cs in the soil cores tended to be uniformly distributed within the plowed layer and declined exponentially below this depth. The mean soil erosion rates of Longji Rice Terraces estimated by 239+240Pu and 137Cs tracer methods were 5.44 t/(ha·a) and 5.16 t/(ha·a), respectively, which demonstrated that plutonium can replace 137Cs as an ideal tracer for soil erosion research in the future. Landform features are the main factors affecting the distribution of plutonium and 137Cs as well as soil erosion in the Longji Rice Terraces.

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Section: Soil Erosion Ratementioning

confidence: 99%

“…239+240 Pu and 137 Cs in the environment are rapidly and strongly adsorbed by fine soil particles and redistributed within the soil itself [21,22,23]. Thus, soil erosion can be traced using the inventories and distribution characteristics of 239+240 Pu and 137 Cs in the soil [21,24,25,26,27,28,29].…”

Section: Introductionmentioning

confidence: 99%

First application of plutonium in soil erosion research on terraces

et al. 2023

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The effects of rainfall regimes and terracing on runoff and erosion in the Three Gorges area, China

Dai

et al. 2018

Environ Sci Pollut Res

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Changes in natural rainfall regimes have taken place and are expected to become more pronounced in future decades. These changes are also likely to be accompanied by changes in crop management practices. The main purpose of this study was to analyze runoff and soil loss in relation to rainfall regimes and terracing in the Three Gorges area, China. Based on 10 years of field observation and k-mean clusters, 101 rainfall events were grouped into three rainfall regimes. Rainfall regime I was the group of events with strong rainfall intensity, high frequency, and short duration. Rainfall regime III consisted of events with low intensity, long duration, and high rainfall amount. Rainfall regime II was the aggregation of events of high intensity and amount, and less frequent occurrence. The results showed that event runoff coefficients were not significantly different among rainfall regimes. However, the average soil erosion rates in rainfall regimes I and II were significantly higher than that in regime III. The average erosion rates under rainfall regimes I, II, and III were 21.6, 39.7, and 9.8 g m, respectively. The effect of rainfall regime on soil erosion also was changed by terracing. On unterraced cropland, soil erosion rate in rainfall regime I is significantly higher than that in regime III. However, the situation did not exist in unterraced orchard. Terracing significantly reduced runoff and soil erosion, and compensated the effects of rainfall regime on soil erosion, which indicated that runoff and erosion in terraced system may be little influenced by climate change. Based on these results, it was suggested more attention should be paid to the timing of rainfall events in relation to crop development and the high erosion on unterraced citrus orchard to control soil erosion in this area.

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