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时间:2020-04-23
《不同坡度下侵蚀量与降雨特征的关系研究-论文.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、沈阳农业大学学报,2014—04,45(2):190-194JournalofShenyangAgricultuUniversity,2014-04,4(】;二不同坡度下侵蚀量与降雨特征的关系研究王碹.赵茜(沈阳农业大学水利学院,沈阳110161)摘要:坡面侵蚀影响因素众多,为研究不同坡度下土壤侵蚀的降雨影响因子。选择坡度为5。,10。,15。野外径流小区,观测雨强、径流量、降雨过程,接取沙样。利用SPSS分析统计软件,对降雨量P(X)、平均雨强I(x2)、瞬时最大雨强I(X,)、最大lOmin雨强IlO(X4)、最大30min雨强i3o(x~)、降雨动能E(x6)、最大3
2、0rain雨强与降雨动能的乘积EI(x71、降雨量与平均雨强的乘积PI(x8)、降雨量与最大瞬时雨强的乘积PIMAx(x9)、降雨量与最大lOmin雨强的乘积PIo(X0)、降雨动能与最大lOmin雨强的乘积EI。(x。)、降雨量与最大30min雨强的乘积PI(X:)和坡度(X)与土壤侵蚀量进行因子分析和逐步回归分析。结果表明:坡面侵蚀量主要受降雨动能和坡度影响,坡度在515。范围内是影响坡面侵蚀的主要因素,坡面侵蚀量与降雨动能和坡度呈线性关系。关键词:坡面;产沙量;降雨;影响因子DOl:10.39696.issn.1000-1700.2014.02.013中图分类号:S1
3、57.1文献标识码:A文章编号:1000—1700(2014)02一O19O一05RelationsofSedimentYieldwithRainfallCharacteristicsunderDiferentSlopeWANGXuan,ZHAOQian(CollegeofWaterConservancy,ShenyangAculturalUniversity,Shenyang110161,China)Abstract:Manyfactorscancauseerosionontheslope.Theeffectsofrainfallontheslopeerosionwere
4、studied.Inrunofplot,theslopeerosioninShenyangundergradesof5。,10oand15。,rainfallintensity,rainfallandrunofprocess,sandsamplewereinvestigated.ByusingthestatisticalanalysissoftwareSPSSforfactoranalysisandstepwiseregressionanalysisonvariousfactorsofafectingsoilerosion,theimpactfactorshaverainf
5、allp(xo,averagerainfallintensityIO(2),maximuminstantaneousrainfallintensityImxo(,maximum10minintensityI10(x4),maximum30minrainfallintensityI30O(5),rainfallkineticenergyEo【6),theproductofrainfallkineticenergyandthemaximum30minrainfallintensityEI~XO,theproductofrainfallandtheaveragerainfalli
6、ntensityPI()(也theproductofrainfallandthemaximuminstantaneousrainfallintensityPIM()(9),theproductofrainfallandmaximum10minrainfallintensityPIl0()【10),theproductofrainfallkineticenergyandthelargest10minrainfallintensityEIlo(x1,theproductofrainfallandmaximum30minrainfallintensityPI30()(12)and
7、slope(Xl3).Thelargestfactorinfluencingonsedimentyieldwasselected.Theresultsindicatedthatthemaininfluenceonsoilerosionisrainfallkineticenergyandslope,slopelinearrelationwithrainfallkineticenergyandslope.Keywords:slope;sedimentyield;rainfall;impactingfactors水土流失
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