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时间:2020-05-20
《麦田降雨入渗特征及其计算模型-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、第28卷第3期水土保持学报Vo1.28No.32014年6月JournalofSoilandWaterConservationJun.,2014麦田降雨入渗特征及其计算模型刘战东,刘祖贵,秦安振,南纪琴,巩文军,段爱旺(1.中国农业科学院农田灌溉研究所农业部作物需水与调控重点开放实验室,河南新乡453002;2.河南省焦作市广利灌区管理局,河南沁阳454550)摘要:为探讨多种因素对麦田降雨人渗特征的影响及其相应的定量关系,通过人工模拟降雨试验,研究麦田降雨强度(RI)、冠层覆盖度(LAD及0—40cm土层土壤初始含水量(口。)对降雨入渗规律的影响。结果表明:其他影
2、响因素一定条件下,人渗率和累积人渗量与降雨历时分别具有显著的幂函数和对数函数关系(P3、、RI、LAI和。的四因素函数关系,并建立降雨蓄积系数回归计算模型(P<0.01)。关键词:冬小麦;模拟降雨;降雨强度;入渗;模型中图分类号:S152.7;S157.4文献标识码:A文章编号:1009—2242(2014)03—0007-07RainfallInfiltrationCharacteristicsandRegressionModelsinWinterWheatFieldLIUZhan—dong,LIUZu—gui,QINAn—zhen,NANJi—qin,GongWen—jun,DUANAi—wang(1.KeyLaboratoryforCropWat4、erRequirementandItsRegulation,MinistryofAgriculture,FarmlandIrrigationResearchInstitute,ChineseAcademyofAgriculturalSciences,Xinxiang,Henan453002;2.GuangliIrrigationAuthority,JiaozuoCity,Qinyang,Henan454550)Abstract:ArainfallsimulationexperimentatGuangliIrrigationExperimentalStationdur5、ingMarchtoJune,2011,wascarriedouttostudytheeffectsofrainfallintensity(RI),canopycoverage(LAI),andtheinitialwatercontentinthe0—40cmsoilprofile(4o)onrainfal1infiltrationcharacteristicsinawinterwheat(cv.WenmaiNO.19)field,quantitativerelationshipsbetweenthoseimpactingfactorsandrainfallinfi6、ltrationwerefurtherexplored.Fiverainfal1intensities,i.e.1.OO,1.33,1.67,2.OO,2.33mm/min,withtherain—falldurationfor60minwerearrangedusingacompletelyrandomizedblockdesignwiththreereplicatesandwereimplementedatfivegrowthstagesofwinterwheat(i.e.,green—turning,jointing,heading,floweringandf7、illingstages).Resultsshowedthat,keepingLAIandoconstant,apowerfunctionwasbestfittodescribethecurveofinfiltrationratesagainstrainfallduration(Y—ab,P<0.01),andalogarithmicfunctionofcumulativeinfiltrationagainstrainfalldurationwasalsosignificanttoexpresstherelationshipsbetweenthetwofacto
3、、RI、LAI和。的四因素函数关系,并建立降雨蓄积系数回归计算模型(P<0.01)。关键词:冬小麦;模拟降雨;降雨强度;入渗;模型中图分类号:S152.7;S157.4文献标识码:A文章编号:1009—2242(2014)03—0007-07RainfallInfiltrationCharacteristicsandRegressionModelsinWinterWheatFieldLIUZhan—dong,LIUZu—gui,QINAn—zhen,NANJi—qin,GongWen—jun,DUANAi—wang(1.KeyLaboratoryforCropWat
4、erRequirementandItsRegulation,MinistryofAgriculture,FarmlandIrrigationResearchInstitute,ChineseAcademyofAgriculturalSciences,Xinxiang,Henan453002;2.GuangliIrrigationAuthority,JiaozuoCity,Qinyang,Henan454550)Abstract:ArainfallsimulationexperimentatGuangliIrrigationExperimentalStationdur
5、ingMarchtoJune,2011,wascarriedouttostudytheeffectsofrainfallintensity(RI),canopycoverage(LAI),andtheinitialwatercontentinthe0—40cmsoilprofile(4o)onrainfal1infiltrationcharacteristicsinawinterwheat(cv.WenmaiNO.19)field,quantitativerelationshipsbetweenthoseimpactingfactorsandrainfallinfi
6、ltrationwerefurtherexplored.Fiverainfal1intensities,i.e.1.OO,1.33,1.67,2.OO,2.33mm/min,withtherain—falldurationfor60minwerearrangedusingacompletelyrandomizedblockdesignwiththreereplicatesandwereimplementedatfivegrowthstagesofwinterwheat(i.e.,green—turning,jointing,heading,floweringandf
7、illingstages).Resultsshowedthat,keepingLAIandoconstant,apowerfunctionwasbestfittodescribethecurveofinfiltrationratesagainstrainfallduration(Y—ab,P<0.01),andalogarithmicfunctionofcumulativeinfiltrationagainstrainfalldurationwasalsosignificanttoexpresstherelationshipsbetweenthetwofacto
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