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ID:32732206
大小:2.17 MB
页数:68页
时间:2019-02-15
《流域分布式水文模拟方案的构建范式地地研究与应用》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、摘要随着GIS技术、Rs技术、计算机技术发展和普及,使得获取和描述流域下垫面空间分布信息成为可能,如何运用这些技术,充分考虑流域下垫面特征的时空变异性,建立分布式水文模拟方案,是进行流域水文模拟的基础,影响着整个模拟过程和结果的合理性、可靠性。本文研究了HEC模型系统在模拟方案构建中的流程,利用HEC—GeoHMS模块和HEC.HMS模型,构建了分布式水文模拟方案,对降雨一径流过程进行模拟,全面了解了其在模拟方案构建中的特点。在此基础上,结合新安江流域水文模型,提出了一整套基于该模型的流域分布式水文模拟方案构建的方法:通过流域解构,将流域离散成产汇流分区的集合,较好地考虑和解决了流域
2、下垫面的空间变异性和模型参数的空间分布;通过流域全程解析,将产汇流分区解析为水文模拟分区,完成了与水文模型的耦合:通过流域拓扑重构,建立了水文模拟分区间的水力联系;为模拟方案的构建奠定了基础。通过《三峡水库入库站(寸滩、武隆)流量预报方案编制》项目的实际应用,结果表明基于新安江模型的分布式水文模拟方案构建方法实用性强,具有可操作性。关键字:分布式水文模拟、HEC模型、新安江模型、方案构建ABSTRACTWiththedevelopmentandpopularizationofGIS,RSandcomputertechnology,itispossibletoobtainanddesc
3、ribethespatialdistributedinformationofthebasinunderlyingsurface.HOWtoutilizethesetechnologieswithfullyconsiderationofthespatialandtemporalvariabilityofbasinunderlyingsurfacecharacteristicsandestablishasolutionofdistributedhydrologicalmodelisthebasisofthebasinhydrologysimulation,whichhasimpacton
4、theentireprocessandtheresultofthereasonabilityandreliability.ThisarticlestudiedtheprocessofHECmodelsysteminthemodelingsolutionconstructionandestablishedadistributedhydrologicalmodelingsolutionusingtheHEC—GeoHMSmoduleandHEC—HMSmodel.madeasimulationoftheprocessofrainfall.mnoff,andfinallygetacompr
5、ehensiveunderstandingofthecharacteristicsinthemodelingsolutionconstruction,Onthisbasis,thisarticleintroducedasetofbasindistributedhydrologymodelingsolutionconstructionwaysincombinationwithXin’anjianghydrologicalmodel:withthebasindeconstruction.makethebasindiscretetOthemnoffyieldandconcentration
6、areas,whichconsideredandresolvedthespatialvariationofthebasinunderlyingsurfaceandthespatialdistributionofthemodelparameters;withtheentirebasinanalysis,resolvetherunoffyieldandconcentrationintothehydrologicalmodelingdivision,whichCancompleteahydrologicalmodelcoupling;withthebasintopologyreconstr
7、uction,establishahydraulicconnectioninhydrologicalmodelingdivisions.whichlaysafoundationiathesimulationsolutionconstruction.Throughtheactualapplicationofthe”ThreeGorgesReservoirStation(Cuntan,Wulong)flowforecastingprogramming”proj
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