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                              Thedeformationcharacteristicsandsurgewavepredictionofthe
                                  HeishibanlandslideintheThreeGorgesReservoirarea

                                                                          4
                                                         4
                                                                                          4
                             SHANGMin   1,2,3,4 ,YUANShuo,WANGDianpeng,SONGYunpeng,
                                                          4
                                              ZHANGXinyi,ZHENGZiliang     4
                              (1.KeyLaboratoryofGeologicalHazardsonThreeGorgesReservoirArea,MinistryofEducation,
                                          ChinaThreeGorgesUniversity,Yichang 443002,China;
                     2.HubeiKeyLaboratoryofDisasterPreventionandMitigation,ChinaThreeGorgesUniversity,Yichang 443002,China;
                         3.NationalFieldObservationandResearchStationofLandslidesinThreeGorgesReservoirAreaofYangtzeRiver,
                                                    Yichang 443002,China;
                          4.CollegeofCivilEngineering&Architecture,ChinaThreeGorgesUniversity,Yichang 443002,China)


                  Abstract:ThefluctuationofwaterlevelsintheThreeGorgesReservoircancauseinstabilityinreservoirbanks,
                  resultingintheformationoflandslidesandsurgingwavedisasters.Inthispaper,theHeishibanlandslideinthe
                  ThreeGorgesReservoirareaisselectedastheresearchobjectbasedontheanalysisofmonitoringdataspanningover
                  adecade ,whichisobservedasahydrodynamicpressure - triggeredlandslide.Rainfallhasacertainboostingeffect
                  onthedeformationofthelandslideonlyduringtheperiodsofreservoirwaterleveldeclineandlowwaterlevelfluctu
                  ations ,whileithaslittleimpactonthelandslidedeformationatothertimes.Byanalyzingthesix - stepdeformation
                  inthecumulativedisplacementcurve ,thethresholdfortriggeringlandslidestepdeformationwasdeterminedwhen
                  thereservoirwaterleveldropsto165m.Thislevelwassetastheinitialwaterlevelheightfornumericalsimulation ,
                  correspondingtothemostdangeroussituationofthelandslide.Surgewavecalculationandpredictionwereconduc
                  tedusingFLOW- 3Dsoftware.Atawaterlevelof165m ,themaximum velocityoflandslideentryintothewater
                  was19.4m?s,themaximum waveheightgeneratedbythesurgewavewas24.9m,andthemaximum run - up
                  reached42.21m.Accordingtothepredictionresults ,thesurgewavesgeneratedafterthedestructionoftheHeishi
                  banlandslidewillinundatepartsoftheareasofShuitianbatownanddestroythemainroadsintothetown ,signifi
                  cantlyaffectingrescueeffortsinShuitianbatown.Thisstudyprovidesascientificbasisfortheriskmanagementof
                  reservoirbanklandslidesurgewavesintheThreeGorgesReservoirareaandhascertainengineeringpracticalsignif
                  icance.
                  Keywords:ThreeGorgesReservoirarea;reservoirwaterlevelfluctuations;triggeringthreshold;numericalsim
                  ulation ;surgingwaveprediction


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