降水不均匀变化对红碱淖面积的影响.pdf

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1、第36卷第5期人民黄河Vo1．36．No．52014年5月YELL0WRIVERMay．2014【水文·泥沙】降水不均匀变化对红碱淖面积的影响白乐，李怀恩，何宏谋，李皓冰(1．西安理工大学西北水资源与环境生态教育部重点实验室，陕西西安710048；2．黄河水利科学研究院，河南郑州450003)摘要：利用红碱淖流域中鸡雨量站1977-2008年降水量资料，构建了降水基尼系数模型，分析了降水量基尼系数的变化规律，结合红碱淖面积变化趋势，揭示了降水不均匀变化对红碱淖面积的影响。结果表明：1977-2008年平均降水基尼

2、系数为0．4452，年降水量与降水基尼系数呈一定的负相关性，即丰水年基尼系数较小，枯水年增大，其他年型在均值上下浮动；②降水主要通过其不均匀分布对红碱淖水量进行削丰补枯调节，成为影响其面积的重要因素之一。关键词：基尼系数；降水年型；面积变化；不均匀变化；降水；红碱淖中图分类号：$812；P333文献标志码：Adoi：10．3969／j．issn．1000—1379．2014．05．叭1InfluenceoftheHongjiannaoLake’SVariationontheDiscontinuityPrecipi

3、tationChangesBAILe，LIHuai—en，HEHungmou，LIHao—bing2(1．KeyLaboratoryofNorthwestWaterResourcesandEcologicalEnvironmentofMinistryofEducation，Xi’anUniversityofTechnology，Xi’an710048，China；2．YellowRiverInstituteofHydraulicResearch，Zhengzhou450003，China)Abstract：Bas

4、edontheprecipitationdataofZhon~iRainfallStationfrom1977to2008，thispaperestablishedtheprecipitationGinicoeficientmodeltoanalyzeprecipitationGinicoeficientchangingpatternunderthediferentprecipitationyears，combiningwiththeHongjiannaoareachangetrend。theeffectofun

5、evenprecipitationdistributiononHongjiannaoareawasanalyzed．Theresultsshowthat：a)the32一yearmeanGinicoeficientofprecipitationtemporaldistributionfrom1977to2008is0．4452，andtheannualprecipitationhassomenegativecorrelationwiththeGinicoeffi—cientofprecipitation．Inot

6、herwords，theGinicoeff~cientofprecipitationisratheronthebighsideindryyears，lowerinwetyears，andtheGinicoefficientofprecipitationaboveandbelowthemeaninotherhydrologicalyears；b)precipitationbecomesoneoftheimportantfactorsaffectedtheareadistributionofHongjiannaoLa

7、kebytheunevendistributionofprecipitation，whichincreasestheamountofwaterresourcesofHongjiannaoLakeindryhydrolugicalyears，andabatestheamountofwaterresourcesinwethydrologicalyears；C)tobecomparedwithcurveoftypeⅡ，thecurYeoftype1whichhasahigherproportionoftheprecip

8、itation．shouldhavestrongerstabilityandmoreconducivetothestabilityofttongjiannaoarea．Keywords：Ginicoeficient；precipitationyear；changeofarea；discontinuitychange；precipitation；HongjiannaoLak