[1]LI Hualin,GAO Huaduan,HU Qin,et al.Influence of Runoff on Sediment Yield on Slope in Karst Area[J].Research of Soil and Water Conservation,2017,24(02):26-30.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
24
Number of periods:
2017 02
Page number:
26-30
Column:
Public date:
2017-04-28
- Title:
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Influence of Runoff on Sediment Yield on Slope in Karst Area
- Author(s):
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LI Hualin1, GAO Huaduan1, HU Qin1, GAO Ruxue1, SUN Quanzhong2
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1. Forestry college of Guizhou University, Guiyang 550025, China;
2. Soil and Water Conservation Technical Consulting and Research Center of Guizhou Province, Guiyang 550002, China
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- Keywords:
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karst area; vegetation types; slope runoff; sediment yield
- CLC:
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S157.1
- DOI:
-
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- Abstract:
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Mahuangtian watershed is a typical karst basin in Guanling County of Guizhou Province. According to the observation data of six slope runoff plots from 2009 to 2012 in the small watershed, we’ve studied the effect of runoff on sediment in three different vegetation types, which are arbor forest, shrub forest and abandoned grassland. The main results are as followings. Three vegetation types had the same effect in times of runoff, but sediment yield events were different, the yield of sediment decreased in the order:grassland > arbor land > shrub forest; annual runoff in shrub land and arbor forest land was similar but the annual runoff of grassland was double as the total of former two types. Annual sediment yield of grassland was 55.17 t/km2 which is 11 times of sediment yield in the shrub forest, and 6 times of sediment yield in arbor; the runoff and sediment yield showed no significant connection in arbor forest but the linear relationship between runoff and sediment yield was found in shrub forest, the fitting equation is y=0.1707x+0.2526, R2 values is 0.48, and power function relationship was found in grassland, the fitting equation is y=0.3246x1.2965, R2 values is 0.64.