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[1]WU Bing,SHAO Ming-an,MAO Tian-xu,et al.Effects of Slope Gradient on Runoff and Sediment Process in Stony Soil by Stimulated Rainfall[J].Research of Soil and Water Conservation,2010,17(05):54-58.

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Effects of Slope Gradient on Runoff and Sediment Process in Stony Soil by Stimulated Rainfall

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 17 Number of periods: 2010 05 Page number: 54-58 Column: Public date: 2010-10-20

Title:: Effects of Slope Gradient on Runoff and Sediment Process in Stony Soil by Stimulated Rainfall

Author(s):: WU Bing¹, SHAO Ming-an^1,2, MAO Tian-xu¹, ZHU Yuan-jun²; 1. College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China;
2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling, Shaanxi 712100, China

Keywords:: rainfall; runoff; sediment yield; gravel contents; slope gradient

CLC:: S152.7;S157

DOI:: -

Abstract:: Investigation on the process of runoff and sediment in stony soil can help to understand soil and water process in this kind soil and also provide significant soil parameters for soil erosion process-modeling. In this study, the processes of runoff and sediment in soil containing gravels under three slope gradients were analyzed by simulated rainfall experiments. The results indicated that the runoff in stony soil increased obviously during 0～20 min and then became steady. The effect of gradient on runoff was weakened with the increasing of gravels in the soils. The peak period of sediment generation appeared between 0～20 min. The sediment yields generated during this stage accounted for a considerable proportion to the total. When the gradient reached 15°, the sediment yields of soils with the gravel contents of 20%, 30% and 40% increased again after 30 min. And total soil sediment yields under this gradient increased greatly compared with others. In the experiments, the gradient of the slope dominated the sediment yield.

References:: [1] Van Wesemael B,Poesen J,de Figueiredo T.Effects of rock fragments on physical degradation of cultivated soils by rainfall[J].Soil and Tillage Research,1995,33:229-250.
[2] Poesen J,Torri D,Bunte K.Effects of rock fragments on soil erosion by water at different spatial scales: a review[J].Catena,1994,23:141-166.
[3] Brakensiek D L.Soil containing rock fragments: effects on infiltration[J].Catena,1994,23:99-110.
[4] Poesen J,Lavee H.Rock fragments in topsoils: significance and processes[J].Catena,1994,23:1-28.
[5] Poesen J.Surface sealing as influenced by slope angle and position of simulated stones in the top layer of loose sediments[J].Earth Surf.Process Landforms,1986,11:1-10.
[6] Poesen J,Ingelmo-Sanchez F,Mficher H.The hydrological response of soil surfaces to rainfall as affected by cover and position of rock fragments in the top layer[J].Earth Surf.Process Landforms,1990,15:653-671.
[7] Valentin C.Surface sealing as affected by various rock fragment covers in West Africa[J].Catena,1994,23:87-97.
[8] Dunn A J,Mehuys G R.Relationship between gravel content of soils and saturated hydraulic conductivity in laboratory tests[C] //Nichols J D.Erosion and Productivity of Soils Containing Rock Fragments.Special Publication,13.Soil Science Society of America,Madison,WI.1984.
[9] Rawls W J,Stone J J,Brakensiek D L.Infiltration[M] //USDA-Water Erosion Prediction Project: Hillslope Profile Version.NSER1 Report Number 2,National Soil Erosion Research Laboratory,USDA-ARS,West Lafayette,IN,Ch.,1989.
[10] Simanton J R,Renard K G,Christiaensen C M,et al.Spatial distribution of surface rock fragments along catenas in semi-arid Arizona and Nevada[J].Catena,1994,23:29-42.
[11] Marques M A,Mora E.The influence of aspect on runoff and soil loss in a Mediterranean burnt forest Spain[J].Catena,1992,19:333-344.
[12] 朱元骏,邵明安.不同砾石含量的土壤降雨入渗和产沙过程初步研究[J].农业工程学报,2006,22(2):64-67.

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