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时间:2020-06-05
《四川盆地蒸发皿蒸发量变化趋势及影响因子分析.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30卷第3期水资源保护2014年5月Vo1.30No.3WATERRESOURCESPROTECTiONMav2014DOI:10.3969/j.issn.1004—6933.2014.03.008四川盆地蒸发皿蒸发量变化趋势及影响因子分析杨甫乐,荣艳淑,杨甫光(1.河海大学水文水资源学院,江苏南京210098;2.四川省煤监局安全技术中心,四川I成都610000)摘要:利用四川盆地蒸发皿蒸发量、气温、风速、日照时数、气压和水汽压资料,分析了1980-2010年四川盆地蒸发皿蒸发量的变化及其原因。结果表明,四川盆地蒸发皿蒸发量存在明显的时空变化特征,空间上川中
2、丘陵区的蒸发.II/.蒸发量最大,川西平原次之,川东平行岭谷区域最小;时间上年蒸发.II/.蒸发量存在明显的波动上升趋势,季节序列中,秋季和冬季蒸发皿蒸发量增加趋势明显,春季和夏季没有明显趋势。对蒸发皿蒸发量变化有显著影响的气象因子依次为日照时数、平均风速、水汽压和气温,其中日照时数对蒸发皿蒸发量的增大作用是风速的1.71倍,是水汽压的2.48倍,而气温具有减少蒸发皿蒸发量的作用,其减弱蒸发皿蒸发量的平均强度是日照时数的1/4。关键词:蒸发皿蒸发量;因次分析;影响因子;四川盆地中图分类号:TV14文献标志码:A文章编号:1004—6933(2014)03—003
3、8—07AnalysisofpanevaporationchangetrendanditsinfluencingfactorsinSichuanBasinYANGFule,RONGYanshu,YANGFuguang(1.CollegeofHydrologyandWaterResources,HohaiUniversity,Nanfing210098,China;2.SafetyandTechnologyCenterofSichuanCoalMineSafetyBureau,Chengdu610000,China)Abstract:Basedonthedatao
4、fdailypanevaporation,airtemperature,windspeed,sunshineduration,airpressure,andvaporpressureoftheSichuanBasin,thepanevaporationvariationanditscausesinthebasinfrom1980to2010wereanalyzed.TheresultsshowthatthepanevaporationintheSichuanBasinhadobviousspatialandtemporalvariationcharacteris
5、tics.Thelargestpanevaporationwasf0undinmidlandSichuanBasinwithhillyareas.followedbythatinthewesternSichuanPlain.andthesmallestpanevaporationwasf0undintheparallelvalleyareaineasternSichuanBasin.Asignificantupwardtrendwasf0undintheannualpanevaporation.Thepanevaporationhadasignificantin
6、creasingtrendintheautumnandwinter.whilenosignificanttrendwasf0undinthespringandsummer.Themainmeteorologicalfaetorsinfluencingthepanevaporationincludedthesunshineduration.theaveragewindspeed,vaporpressure,andairtemperature,andtheimpactofsunshinedurationonthepanevaporationincreasewas1.
7、71timesthatofthewindspeed,and2.48timesthatofthevaporpressure.However.theairtemperaturecouldreducethepanevaporation,andthepanevaporationreducedbytheairtemperaturewasonefourthofthatreducedbythesunshinedurationonaverage.Keywords:panevaporation;dimensionalanalysis;impactfactor;SichuanBas
8、in地球气候系统正经历显
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