[1]LI Gang,LIANG Yin,CAO Long-xi.Effect of Mining Methods of Data of Rainfall and Sediment on the Relationship between Rainfall and Sediment Yield[J].Research of Soil and Water Conservation,2013,20(01):30-36.
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Effect of Mining Methods of Data of Rainfall and Sediment on the Relationship between Rainfall and Sediment Yield
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
20
Number of periods:
2013 01
Page number:
30-36
Column:
Public date:
2013-02-28
- Title:
- Effect of Mining Methods of Data of Rainfall and Sediment on the Relationship between Rainfall and Sediment Yield
- CLC:
- S157.1
- DOI:
- -
- Abstract:
- The reasonable mining method of soil erosion data is the foundation of exploiting data characteristic. Rainfall and sediment data of different vegetation restoration plots were collected from 2010 to 2011 in the ganxian county of jiangxi province. The relationships between precipitation and sediment were investigated by using four kinds of methods. The results indicated that expanding the time scale and interval of rainfalls could significantly improve the correlation between precipitation and sediment yield. Meanwhile, characteristic parameters of the fitting cures were impacted by different methods. Comprehensively considering the coefficient of determination and consistency of the cures properties, power function could describe the relationships between precipitation and sediment yield for different type plots with the method of interval of rainfalls not less than 7 days (interval between rainfalls less than 7 days as a statistical unit for the data). However, sediment rate in pure forest plot (Pinus massoniana) was significantly higher than those in vegetation restoration plots (Paspalum notatum and Lespedeza bicolor) in Pinus massoniana forest. With precipitation increase, sediment rate reduced down for pure forest plot, changed slowly for Paspalum notatum plot, increased rapidly for Lespedeza bicolor plot with lower canopy density. Therefore, controlling soil and water loss of eroded forestland was regarded as the primary task, and herbal should be grown firstly in the early period of vegetation restoration and progressive realization ecological community restoration of multi-layers structure with tree-shrub-herbal.
- References:
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