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[1]LIU Jia-ming,ZHA Xuan,HUANG Shao-yan.Research for Purple Soil and Quaternary Rred Clay Soil Erosion Process on Hillslope Under Natural Rainfall[J].Research of Soil and Water Conservation,2014,21(06):16-19.

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Research for Purple Soil and Quaternary Rred Clay Soil Erosion Process on Hillslope Under Natural Rainfall

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 21 Number of periods: 2014 06 Page number: 16-19 Column: Public date: 2014-12-28

Title:: Research for Purple Soil and Quaternary Rred Clay Soil Erosion Process on Hillslope Under Natural Rainfall

Author(s):: LIU Jia-ming^1,2, ZHA Xuan^1,2, HUANG Shao-yan^1,2; 1. Key Laboratory of Subtropical Resources and Environment, Fuzhou 350007, China;
2. College of Geography Science, Fujian Normal University, Fuzhou 350007, China

Keywords:: hillslope erosion; purple soil; quaternary red clay soil; natural rainfall

CLC:: S157.1

DOI:: -

Abstract:: Purple soil and quaternary red clay soil two typical soil types in red soil zone of southern China were selected. Through natural rainfall experiments, under the same test conditions, changes in runoff and sediment yield, soil aggregates and particle size of purple soil and quaternary red clay soil the two kinds of soil parent material slope erosion were analyzed in order to illustrate the process of soil erosion on the slope in red soil region of southern China. The results showed: (1) rainfall is the main cause of slope runoff, with increasing rainfall, runoff constantly increases, runoff rate is greater in Ppurple soil than Quaternary red clay soil; (2) rainfall intensity is the main cause of slope sediment yield, especially in heavy rainfall during moderate and heavy rain soil erosion and sediment generation were more obvious, the ratio the amount of soil erosion and sediment bentween purple soil and quaternary red clay soil is 1.14∶1.0; (3) < 0.25 mm micro-aggregates in purple soil and quaternary red clay soil are dominant, accounting for more than 65%, while 90% for purple soil, purple soil micro-aggregates were more severely loss than the quaternary red clay; (4) by comparing the two types of soil particles before and after rainfall analysis of soil, reduced soil particles of purple soil are clay and silt particles, the relative increase was found in the sand particle, changes were large, but clay content in qauaternary red is relatively little.

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