| AN EXPERIMENTAL STUDY OF SHEET EROSION IN GRANITIC REGION OF WUHUA COUNTY,GUANGDONG PROVINCE |
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| 引用本文： | Jin Changxing(Institute of Geography,CAS,Bejing people''s Republic of ChinZang Guohua(Soil and Water Conservation Experimental Station of Wuhu,Guangdong People''s Republic of Chin. AN EXPERIMENTAL STUDY OF SHEET EROSION IN GRANITIC REGION OF WUHUA COUNTY,GUANGDONG PROVINCE[J]. 地理学报(英文版), 1994, 0(Z2) |
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| 作者姓名： | Jin Changxing(Institute of Geography CAS Bejing people''s Republic of ChinZang Guohua(Soil and Water Conservation Experimental Station of Wuhu Guangdong People''s Republic of Chin |
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| 作者单位： | Jin Changxing(Institute of Geography，CAS，Bejing 100101 people's Republic of China)Zang Guohua(Soil and Water Conservation Experimental Station of Wuhua，Guangdong 514471People's Republic of China) |
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| 摘 要： | 1.IntroductionWuhuaCounty,locatedintheupstreamOfHanjianghiver,isoneofthemostseriouslyerodedcountiesinSouthChinagraniticweatheringregionOfGUangdOngPrOvince.ByinveStighion,thetOtalerodedareaisestimatedtobe875.33km,whichoccupiedbot30percentofthetOtalerodedareaoftenmostseriouserodedcountiesintheregion.Insomeconununes,theeroddareaevenreachedtomorethan6Opercent.ErosionresuItedinwidesPedOfbemountalns,landdopadaion,shortOfwterresourceshoperecotw.~ngthethreetypesoferosionintheupstreamOfHanjian…
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AN EXPERIMENTAL STUDY OF SHEET EROSION IN GRANITIC REGION OF WUHUA COUNTY,GUANGDONG PROVINCE |
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| Jin Changxing. AN EXPERIMENTAL STUDY OF SHEET EROSION IN GRANITIC REGION OF WUHUA COUNTY,GUANGDONG PROVINCE[J]. Journal of Geographical Sciences, 1994, 0(Z2) |
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| Authors: | Jin Changxing |
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| Abstract: | The relationships between rainfall, runoff and erosion in South China granitic weathering red soil region were studied by using data collected from 7 experimental plots in Wuhua County, Guangdong Province. Results showed that when rainfall is less than 50 mm, small volumes of runoff were produced. Rainfall intensity might be the main factor in controlling runoff. When rainfall exceeds 50 mm, because of its large volume and high intensity, runoff and the produced amount of erosion increased with raimfall quickly. Analysis of the relationship bebeen runoff and erosion suggsted that runoff of 30 mm (corresponding to about 50 mm rainfall might be taken as a threshold at which wter on land surface was sufficient to start the larg amount of soil particles. Vegtation cover is very effective in protection soil from being eroded. When vegetation coverag increases from 0 to 80 percent,runoff and soil loss decrease from 179.34mm/a to 126.36mm/a and 6262.15T/a km2 to 368.02 T/a km2, respectively. |
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| Keywords: | soil erosion experimental study South China |
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