The effect of row grade and length on soil erosion from concentrated flow in furrows of contouring ridge systems

Liu, Q.J.; An, J.; Zhang, G.H.; Wu, Xinyang

doi:10.1016/j.still.2016.02.012

Cited by 12 publications

(2 citation statements)

References 30 publications

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“…However, previous research exhibits some deficiencies and limitations. Most studies are conducted in karst basins or mountain areas (Shi et al, 2004;Terranova et al, 2009) and analyze the effect of terrain, rainfall, vegetation cover, and other factors on soil erosion (M. Ganasri and Ramesh, 2016;Liu et al, 2016). The effects of soil erosion on rocky desertification and lithology have been ignored.…”

Section: Introductionmentioning

confidence: 99%

Soil erosion evolution and spatial correlation analysis in a typical karst geomorphology using RUSLE with GIS

et al. 2017

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Abstract. Although some scholars have studied soil erosion in karst landforms, analyses of the spatial and temporal evolution of soil erosion and correlation analyses with spatial elements have been insufficient. The lack of research has led to an inaccurate assessment of environmental effects, especially in the mountainous area of Wuling in China. Soil erosion and rocky desertification in this area influence the survival and sustainability of a population of 0.22 billion people. This paper analyzes the spatiotemporal evolution of soil erosion and explores its relationship with rocky desertification using GIS technology and the revised universal soil loss equation (RUSLE). Furthermore, this paper analyzes the relationship between soil erosion and major natural elements in southern China. The results are as follows: (1) from 2000 to 2013, the proportion of the area experiencing micro-erosion and mild erosion was at increasing risk in contrast to areas where moderate and high erosion are decreasing. The area changes in this time sequence reflect moderate to high levels of erosion tending to convert into micro-erosion and mild erosion. (2) The soil erosion area on the slope, at 15-35 • , accounted for 60.59 % of the total erosion area, and the corresponding soil erosion accounted for 40.44 %. (3) The annual erosion rate in the karst region decreased much faster than in the non-karst region. Soil erosion in all of the rock outcrop areas indicates an improving trend, and dynamic changes in soil erosion significantly differ among the various lithological distribution belts. (4) The soil erosion rate decreased in the rocky desertification regions, to below moderate levels, but increased in the severe rocky desertification areas. The temporal and spatial variations in soil erosion gradually decreased in the study area. Differences in the spatial distribution between lithology and rocky desertification induced extensive soil loss. As rocky desertification became worse, the erosion modulus decreased and the decreasing rate of annual erosion slowed.

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Section: Introductionmentioning

confidence: 99%

Soil erosion evolution and spatial correlation analysis in a typical karst geomorphology using RUSLE with GIS

et al. 2017

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“…Under free drainage condition, Liu et al [ 27 ] observed that row grade positively affected runoff during inter-rill and rill erosion process through simulated rainfall experiments, which was similar to that occurred during the phrase of contour failure [ 52 ]. While, Liu et al [ 53 ] noted that row grade showed no obvious effect on runoff from concentrated flow in furrows of contour ridge systems. Unlike these previous studies, under free drainage conditions, row grade had one-way negatively effect on nutrient loss ( Figure 8 and Figure 9 ) in this study, which also differed from the observations of An et al [ 11 ] under seepage without rainfall condition.…”

Section: Discussionmentioning

confidence: 99%

Effect of Ridge Height, Row Grade, and Field Slope on Nutrient Losses in Runoff in Contour Ridge Systems under Seepage with Rainfall Condition

Geng

Yang

et al. 2021

IJERPH

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Seepage plays a key role in nutrient loss and easily occurs in widely-used contour ridge systems due to the ponding process. However, the characteristics of nutrient loss and its influential factors under seepage with rainfall condition in contour ridge systems are still unclear. In this study, 23 seepage and rainfall simulation experiments are arranged in an orthogonal rotatable central composite design to investigate the role of ridge height, row grade, and field slope on Nitrate (NO3−–N) and Orthophosphate (PO4+3–P)losses resulting from seepage in contour ridge systems. In total, three types of NO3−–N and PO4+3–P loss were observed according to erosion processes of inter-rill–headward, inter-rill–headward–contour failure, and inter-rill–headward–contour failure–rill. Our results demonstrated that second-order polynomial regression models were obtained to predict NO3−–N and PO4+3–P loss with the independent variables of ridge height, row grade, and field slope. Ridge height was the most important factor for nutrient loss, with a significantly positive effect and the greatest contribution (52.35–53.47%). The secondary factor of row grade exerted a significant and negative effect, and was with a contribution of 19.86–24.11% to nutrient loss. The interaction between ridge height and row grade revealed a significantly negative effect on NO3−–N loss, whereas interactions among the three factors did not significantly affect PO4+3–P loss. Field slope only significantly affected NO3−–N loss. The optimal design of a contour ridge system to control nutrient loss was obtained at ridge height of 8 cm, row grade of 2°, and field slope of 6.5°. This study provides a method to assess and model nutrient loss, and improves guidance to implement contour ridge systems in terms of nutrient loss control.

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Rainstorm pattern effects on the size distribution of soil aggregate in eroded sediment within contour ridge systems

Wang

2020

J Soils Sediments

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The effect of row grade and length on soil erosion from concentrated flow in furrows of contouring ridge systems

Cited by 12 publications

References 30 publications

Soil erosion evolution and spatial correlation analysis in a typical karst geomorphology using RUSLE with GIS

Soil erosion evolution and spatial correlation analysis in a typical karst geomorphology using RUSLE with GIS

Effect of Ridge Height, Row Grade, and Field Slope on Nutrient Losses in Runoff in Contour Ridge Systems under Seepage with Rainfall Condition

Rainstorm pattern effects on the size distribution of soil aggregate in eroded sediment within contour ridge systems

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