黄河中游多沙粗沙区治理对黄河下游减淤影响研究.ppt

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1、黄河中游多沙粗沙区治理对黄河下游减淤影响研究TheImpactResearchofControllingtoSediment-ladenandCoarseSandAreaintheMiddleonSedimentationReductionoftheLowerYellowRiverHydrologyBureau，YRCC高亚军GaoYajun2007.6汇报内容CONTENT1、多沙粗沙区和粗泥沙集中来源区简介Introductionofsediment-ladenandcoarsesandareaandcoarsesan

2、dconcentratedsourceregionofthemiddleYellowRiver3、多沙粗沙区各治理分区来沙对下游河道冲淤影响的估算Outlinetheareaofthesedimentoverloadedandcoarsesedimentregiontoestimatestheerosionandsedimentationofriver’slowerreaches2、多沙粗沙区治理分区的确定Thedefineofsub-areainsediment-ladenandcoarsesandareacontrol

3、ling1多沙粗沙区和粗泥沙集中来源区简况Introductionofsediment-ladenandcoarsesandareaandcoarsesandconcentratedsourceregionofthemiddleyellowriver多沙粗沙区和粗泥沙集中来源区的位置Thelocationofthesediment-ladenandcoarsesandareaandthecoarsesandconcentratedsourceregion多沙粗沙区在黄河中游的产沙贡献Contributionofsedime

4、ntproductioninSediment-ladenandcoarsesandareaofthemiddleyellowriver结论：多沙粗沙区是拦截入黄泥沙的重点区Conclusion:Thesediment-ladenandcoarsesandareaisthemostimportantareatoheadoffthesedimentintoYellowRiver.粗泥沙集中来源区在多沙粗沙区中的产沙贡献Contributionofsedimentproductionincoarsesandconcentrate

5、dsourceregionofthemiddleYellowRiver结论：粗泥沙集中来源区是拦截入黄粗泥沙的重中之重地区Conclusion:coarsesandconcentratedsourceregionisthemostimportantareatoheadoffcoarsesedimentintoYellowRiver.2多沙粗沙区治理分区的划分Thedefineofsub-areainsediment-ladenandcoarsesandareacontrolling2.1划分原则DividingPrinci

6、ples1.快速减少下游河槽粗泥沙淤积；TherapiddegradationofthecoarsesandofChannelssedimentationdepositioninlower.2.治理面积相对较小，拦减粗泥沙量相对较多；Arelativelysmallareaandtherelativelylargeamountofcoarsesedimentreductioninterceptions.3.对入黄水资源影响较小；LittleImpactoftheYellowRiverEnteredwaterResource

7、s.4.当地生态环境改善与下游河道减淤同步。PrincipletoimprovetheecologicalenvironmentandinthelowerreachesMinimizingdepositionofsynchronicity.2.2分区指标Dividingindex经过论证，以粒径≥0.1mm为粗泥沙界限，以粒径≥0.1mm的粗泥沙输沙模数1400t/(km2•a)和700t/(km2•a)为指标，对多沙粗沙区进行进一步划分。Afterverification,wetakethediameterlargert

8、han0.1mmindiameteraslimitsofcoarsesediment,andtake1,400tonssedimentmodulus(km2•a)and700tons(km2•a)whichhavelargerthan0.1mmdiametersedimentasanindicatort