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ID:37379073
大小:1.78 MB
页数:6页
时间:2019-05-22
《径流年内分配不均匀性的度量指标及其应用》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、第41卷第11期2015年11月水力发电径流年内分配不均匀性的度量指标及其应用1231陆建宇,王秀庆,王学斌,陆宝宏(1.河海大学水文水资源学院,江苏南京210098;2.淮河水利委员会沂沭泗水利管理局,江苏徐州221018;3.水资源高效利用与工程安全国家工程研究中心,江苏南京210098)摘要:河川径流的年内分配不均匀性直接影响水利工程的运行方式。为准确度量径流年内分配不均程度,尝试引入变率指数FI、分摊熵AE、基尼系数Gini、集中指数CI、余期望系数SEI和赫氏指数HHI等六种度量指标,并以沂河临沂站天然月径流为例,分析各指标的适用性及存在的不足。结果表
2、明,各指标年际变化相似度极高,峰、谷值出现时间基本一致,可以使用其中的任何一个指标度量径流年内分配的不均匀性;Gini考虑了径流年内时程分布及各月径流量大小的影响,能够定量地评价径流年内分配的不均匀程度,比其他指标有更高的分辨力,用Gini度量径流年内分配不均匀程度最合适。关键词:河川径流;年内分配;不均匀性;度量指标;沂河流域MeasurementIndexofNonuniformityofIntra-annualRunoffDistributionandItsApplication1231LUJianyu,WANGXiuqing,WANGXuebin,LUB
3、aohong(1.CollegeofHydrologyandWaterResources,HohaiUniversity,Nanjing210098,Jiangsu,China;2.WaterConservancyAdministrationofYi-Shu-SiRiverBasinoftheHuaiheRiverCommission,Xuzhou221018,Jiangsu,China;3.NationalEngineeringResearchCenterofWaterResourcesEfficientUtilizationandEngineeringSaf
4、ety,Nanjing210098,Jiangsu,China)Abstract:Thenonuniformityofintra-annualstreamflowdistributionhasadirectimpactonwaterprojects'operationmode.Inordertomeasurethenonuniformityofintra-annualstreamflowdistributionaccurately,sixmeasurementindexesareintroduced,includingFlashinessIndex(FI),Ap
5、portionmentEntropy(AE),Ginicoefficient(Gini),ConcentrationIndex(CI),Surplus-ExpectationIndex(SEI)andHerfindahl-HirschmanIndex(HHI).TheapplicabilityanddisadvantagesoftheseindexesareobtainedthroughthenaturalmonthlyrunoffdataofLinyiStationinYiheRiverBasin.Theresultsshowthat:(a)thereisah
6、ighdegreeofsimilarityabouttheinter-annualvariabilityofeachindexandtheappearancetimeofpeak,valleypointsarealmostthesame,soanyoneofwhichcanbeusedasanindicatortomeasurethenonuniformityofintra-annualstreamflowdistribution;(b)thetemporaldistributionofintra-annualstreamflowandthesizeofthem
7、onthlyrunoffareconsideredinGiniandGinicanquantitativelyevaluatethenonuniformityofintra-annualstreamflowdistribution,sotheGinihasahigherresolutionthanotherindexesandisthemostappropriateindextomeasurethenonuniformityofintra-annualstreamflowdistribution.KeyWords:streamflow;intra-annuald
8、istribution;
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