模擬降雨條件下退化草原不同植被配置產(chǎn)流產(chǎn)沙特性研究.pdf

1、分類號(hào)S812.6學(xué)校代碼10129UDC502學(xué)號(hào)2012204038模擬降雨條件下退化草原不同植被配置產(chǎn)流產(chǎn)沙特性研究模擬降雨條件下退化草原不同植被配置產(chǎn)流產(chǎn)沙特性研究StudyontheSedimentYieldRunoffUnderDifferentCombinationofVegetationwithArtificialSimulationRainfallonDegradedGrassl申請(qǐng)人：王穎學(xué)科門類：農(nóng)學(xué)學(xué)科專業(yè)：水土

2、保持與荒漠化防治研究方向：荒漠化防治指導(dǎo)教師：崔向新教授論文提交日期：二〇一五年六月StudyontheSedimentYieldRunoffUnderDifferentCombinationofVegetationwithArtificialSimulationRainfallonDegradedGrasslAbstractVegetationisanimptantfactinaffectingsoilerosionunderstin

3、gtheeffectofGrasslVegetationonrunoffsedimentinXilinGuoleistheimptantcontentininvestigatingitswaterconservationbenefitsofvegetation.InthispaperedAgropyronmongolicumBromusinerisMelilotussuaveolensMedicagosativaasthemainobj

4、ectsofstudybywayofartificialrainfallinfieldexperimentstoinvestigaterunoffsedimentacteristicschangeinslopeunderdifferentrainfallintensityvegetationmixingwayswaterretentionagentthemainconclusionsareasfollows:(1)whenvegetat

5、ioncombinedwithdifferentgradientofwaterretentionagentwaterretentionagentisadministeredwithaninitialincreaseintheamountoftimefollowedbyadelayedrunoffthedelaytimeofrunoffincreased.Whentherainfallintensityis0.73mmmintheinit

6、ialrunofftimewas7.4mininnaturalgrasscellwhichwasapplying0gmwithwaterretentionagentwhenapplying50gmofwaterretentionagentthedelaytimeofrainfallis15minthesameamountofapplicationofwaterretentionagentontimedelayeffectonvegeta

7、tioninitialrunoffrunoffperfmedthatfthesameamountofwaterretentionagentinitialrunoffinartificialgrasslwaslaterthannaturalgrasslwhenapplying50gmwaterretentionagentrainfallintensityis1.03mmminthelaterinitialrunofftimeofBromu

8、sinerisMelilotussuaveolenswas5.73min3.16minlaterthannaturalgrassl.Samerainfallintensityrunoffdelaytimeundersameamountofwaterretentionagentapplicationratewasnotverydifferentabout0.5minso.(2)Afterwaterretentionagentwasappl

9、iedindifferentvegetationconfigurationsperfmedthatwithincreasedwaterretentionagentrunoffwasdecreased.Whenrainfallintensitywas1.03mmmintheproductionflowwas27.82LinAgropyronmongolicumMelilotussuaveolensthatapplying0gmwithwa

10、terretentionagentwhileitwas15.02Lmethanwhenappliedwith50gmwaterretentionagentthesamegradientofwaterretentionagentonvegetationproducingflowperfmedasignificantlinearcrelationbetweentherunofftheproducingtime(R0.85)comparing

11、thesimulatedtrendlineindicatedthatthecurveinnaturalgrasslisgreaterthantheartificialgrassl.(3)Afterwaterretentionagentwasappliedindifferentvegetationconfigurationsitssurfacesedimentyieldislargelyinfluencedbyamountofretain