已阅读5页，还剩20页未读， 继续免费阅读
版权说明：本文档由用户提供并上传，收益归属内容提供方，若内容存在侵权，请进行举报或认领
文档简介
April30 2009 PrincipleofHydrology BNU 1 Chapter7HydrographAnalysis Prof ZongxueXU April30 2009 PrincipleofHydrology BNU 2 Objectives UnitHydrographT hourUHInstantaneousUHDimensionlessUHUHtransformationUHApplication April30 2009 PrincipleofHydrology BNU 3 UnitHydrograph UH Definition Sherman 1932 Ifagivenone dayrainfallproducesa1 in depthofrunoffoverthegivendrainagearea thehydrographshowingtheratesatwhichtherunoffoccurredcanbeconsideredaunitgraphforthatwatershed April30 2009 PrincipleofHydrology BNU 4 UnitHydrograph UH AnotherdefinitionThehydrographthatresultsfrom1in ofrainfallexcessgenerateduniformlyoverthewatershedatauniformrateduringaspecifiedperiodoftime April30 2009 PrincipleofHydrology BNU 5 BasicAssumptions 1in ofrainfallexcessAuniformspatialdistributionofrainfalloverthewatershedArainfallexcessratethatisconstantwithtimeAspecificdurationofrainfallexcess April30 2009 PrincipleofHydrology BNU 6 UnitHydrograph UH Remarks Aunithydrographisthehydrographofdirectrunoff excludingbaseflow Aunithydrographisproducedby1 0inchofnetrain thetotalrunoffafterabstractions April30 2009 PrincipleofHydrology BNU 7 UHClassification T hourUH TUH InstantaneousUH IUH DimensionlessUH DUH April30 2009 PrincipleofHydrology BNU 8 T HourUnitHydrograph Definition Thehydrographthatresultsfromastormwithaconstantdepthofrainfallexcessof1in overadurationofThours ExampleA2 hrunithydrographwouldhavea1 0 in volumeproducedbya2 hrnetrainfall April30 2009 PrincipleofHydrology BNU 9 InstantaneousUH DefinitionAspecialcaseoftheT hourUH withthedurationofrainfallexcessbeinginfinitesimallysmall April30 2009 PrincipleofHydrology BNU 10 DimensionlessUH DefinitionAdirect runoffhydrographwhoseordinatesaregivenasratiosofthepeakdischargeandwhosetimeaxisisdefinedastheratioofthetimetothepeak April30 2009 PrincipleofHydrology BNU 11 UnitHydrographinChina Timeperiod T hour 1 3 6 12 24 hour etc Unitnetrain 10mm April30 2009 PrincipleofHydrology BNU 12 ImplicitAssumption ImplicitAssumptioninUHRainfallisdistributedinthesametemporalandspatialpatternforallstorms April30 2009 PrincipleofHydrology BNU 13 DerivationofUH SelectionofstormsStormsoccurringindividually thatis simplestormstructureStormshavinguniformdistributionofrainfallthroughouttheperiodofrainfallexcessStormshavinguniformspatialdistributionovertheentirewatershed April30 2009 PrincipleofHydrology BNU 14 ConvolutionIntegral U t Time distributedUHx t Computedtimedistributionofrainfally t Timedistributionofdirectrunoff April30 2009 PrincipleofHydrology BNU 15 DiscreteFormofConvolutionProcess April30 2009 PrincipleofHydrology BNU 16 StepstoDevelopUH AnalyzethestreamflowhydrographtopermitseparationofsurfacerunofffrombaseflowEstimatethetotalvolumeofsurfacerunoff directrunoff fromthestormproducingtheoriginalhydrograph theareaunderthehydrographafterbaseflowisremoved April30 2009 PrincipleofHydrology BNU 17 StepstoDevelopUH Dividetheordinatesofthedirectrunoffhydrographbytotaldirectrunoffvolume andplottheseresultsversustimeasaunitgraphCalculatetheeffectivedurationofrunoff producingrainforthisunitgraphfromthehyetographofthestormeventused April30 2009 PrincipleofHydrology BNU 18 S Hydrograph April30 2009 PrincipleofHydrology BNU 19 S HydrographApplication April30 2009 PrincipleofHydrology BNU 20 InstantaneousUnitHydrograph IUH AnotherdefinitionThehydrographofrunoffthatwouldresultif1in ofwaterwerespreaduniformlyoveranareainaninstantandthenallowedtorunoff April30 2009 PrincipleofHydrology BNU 21 SyntheticUnitHydrograph Gammadistribution April30 2009 PrincipleofHydrology BNU 22 HydrographRouting PurposesPredictthetemporalandspatialvariationsofahydrographasittraversesariverreachorreservoirClassification physicalprocessequationofmotion HydrologicapproachHydraulicapproach April30 2009
温馨提示
- 1. 本站所有资源如无特殊说明，都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等，如果需要附件，请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸，网页内容里面会有图纸预览，若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间，仅对用户上传内容的表现方式做保护处理，对用户上传分享的文档内容本身不做任何修改或编辑，并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容，请与我们联系，我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 2025年形象设计师-中级鉴定模拟100题及答案
- 西藏省重点中学2025届高二物理第二学期期末调研模拟试题含解析
- 车棚租赁与新能源汽车租赁合作合同
- 有关家装合同模板汇编（3篇）
- 桥梁工程劳务分包合同最终
- 营业员技能大赛复习试题含答案
- 行政组织理论与实际管理经验结合试题及答案
- 从容应对2025年考试的技巧与试题及答案
- 数据库工程师考试的成功路径试题及答案
- 公路工程考试有效学习试题及答案
- 活动策划服务投标方案(技术方案)
- 肺动脉高压临床路径
- 韩国文化智慧树知到答案章节测试2023年青岛职业技术学院
- 本科公共关系：理论、实务与案例NO14教学课件
- LSLV-C100变频器说明书
- DLT 1055-2021 火力发电厂汽轮机技术监督导则
- 桡骨远端骨折临床路径PPT课件
- 预制梁场验收及质量管理实施细则
- 爱莲说对比阅读(1)
- 大理石打磨工程装饰协议合同
- 链轮齿数尺寸对照表二
评论
0/150
提交评论