灌區(qū)改造渠道設計水面線分析研究

1、河海大學碩士學位論文灌區(qū)改造渠道設計水面線分析研究姓名：張孟希申請學位級別：碩士專業(yè)：水利工程指導教師：俞雙恩陳紹金20070501#口海大學T程碩一L學位論文AbstractOurcountrysdistrcthavemostlybeenbuiltinthe20century50mtlIestartof60thand70橢，sotheya∞veryoldandseriouslylackofreconditionthewaterusee

2、fficiencyofthesedistrictareverylowtheseconditionsseriouslyeffectthedistrictprojectbenefit，andareeagertobereconstmctlnviewofthedistrictpresentquestions，designachannelwatersurfacecurvewhichbethtobeabletosatisfythedistrictt

3、ransformationgoalandcausethedistricttotaltransformationworktobesmallestisthekeyoftheirrigationsubsequentconstructionWeshouldanalysiswatersurfacecurvefirstbeforethecomputationinordertoconfirmwhatkindofthewatersurfacecurve

4、itisTherearefivedifferentkindsofchannelbottomslopes，andthepositionofthecriticaldepthwaterline(KK)andthenormaldepthofwaterline(NN)arcdifferentsothechannelcanbedividedinto12flowingareas，amountsto12watersurfacecurvesneartic

5、lecomputethewatersnrfacecurvesectionbysectionthoughthepartitionsummationmethod，andmadetheprocedurefortheautomaticsolutionTaketheHuangShilldistrictasamodelcomplywimtheseprinciplessuchas：don’tchangethebuildingsasfaraspossi

6、ble，don’treducethechannellevelasfaraspossible。trytothemakethewaterlossofthenewbuildingstobeleast，trytomakethetotalprojecttobeleastandsoontocomputethechanneldesignedwatersurfacecurve，drafttheoptimizationplanofthechannelwa

7、tersurfacecurveandthetransformschemeofthechannelbuildingComputeitsectionbysectionfromthetailtotheheadonthebaseoftryingtomaintaintheoriginaldesignedwaterlevelandconsideringthewaterlossinadvancewhenthewateracrossthechannel

8、buildingobtainthewatersurfacecurveofthetotaltrunkchannel，thesouthminkchannelandthenorthtrunkchannelRechecktheexistchannelsandbuildingscallfindthatresulthasalreadygotthegoaltocauscthedistricttotaltransformationworktobesma