简介：

简介：

简介：高周波的地震数据部件能严重在unconsolidated在震波繁殖期间被稀释(低速度)层，导致减少的地震分辨率和signal-to-noise(S/N)比率。在这篇论文，基于维纳过滤器理论，首先，为近表面的吸收变细赔偿的反的过滤器计算被直接波浪的分析完成光谱从不同距离的部件接近表面。直接波浪被雷管产生在在洞射击上面并且被接收装置在表面上获得。空间地变化的反的过滤器被设计补偿因为3D的频率变细预先叠CRG(普通接收装置集合)数据。在把过滤器用于CRG数据以后，高频率部件被补偿，低频率维持了。地震决定和S/N比率与合成震动图更好被提高并且匹配并且更好满足地质的解释的需要。

简介：Coastlinesareundergoingconstantgeomorphologicchangeswithrespecttotheincidentwaveclimate.Basedonwavesmeasuredat9mwaterdepth,simulationofnearshorewavetransformationisdoneusingREFDIF-1numericalmodelandthenearshorebreakerparametersareestimatedattwomicro-tidalbeachesalongcentralwestcoastofIndia.Modelresultsarevalidatedwithmeasuredvalues.Fromthebreakerparameters,long-shorecurrentandlong-shoresedimenttransportrates(LSTR)arecomputedbyusingsemi-empiricalequations.Estimatedlong-shorecurrentandLSTRareshowingdramaticvariationswithrespecttoseasons.PredominantdirectionofLSTRisobservedtowardsnorthsincetheapproachwavesarefromsouth-westdirectionduringpre-monsoonandpostmonsoon.Duringmonsoonseason,wavesarefromwestsouth-westandresultedinsoutherlytransport.TheestimatedannualnetandgrossLSTRbyCambridgeEnvironmentalResearchConsultants(CERC)attwolocationsareinthesameorderwhereasLSTRestimatedbyWalton&BrunoandKamphuisequationsareshowingdifferentestimationsbecauseofdifferenceinsurf-zonewidthandforeshoreslopebetweenthetwolocations.Formicro-tidalbeacheswithlengthlessthan6km,KamphuisequationisgivingagreeableestimationofLSTR.SensitivityanalysisofLSTRestimateshowsthatcoastalinclinationistheprominentfactorindeterminingLSTRthanincidentwaveangle.