简介：Thispaperprovidesastep-by-stepderivationofthesedimenttransportfunctionsbyEngelundandHansen(1967)andbyAckersandWhite(1973).ThetheoreticalderivationsdemonstratethatthesetwofunctionsarecloselyrelatedtoBagnold's(1966)streampowerandefficiencyconcepts.

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简介：Jiaojia-patterngoldminescouldbesurveyedbyutilizinglarge-powerinducedpolarizationsounding.Firstly,amulti-layerednumericalmodelofapolarizationbodywasestablishedinsenseofphysicalandmathematicalderivation.Thepolarizationfieldgeneratedfromthemodelwasthestackofindividualfieldsgeneratedfrommulti-layeredpolarizationunits.Theequationforeliminatingstrongshallowpolarizationanomaliesfromthesoundingdatawasderivedbasedontheprincipleofmultiplyeliminatingthefieldsofindividualpolarizationunits.Asaresult,thedeeppolarizationanomalieswereprominent.Theprocessedsoundingdatawasusedtoquantitativelycalculatethedepthstothetopsofdeepalteredzonesofgoldenmineralization.

简介：Acoupledroutingforthetransportcapacityandtheenergyslopeisintroducedthroughthedefinitionofthecontrolfactormwhosevalueislinkedtothebedformconfiguration.Thecouplingaimstofurtherincorporatetheinteractionsoccurringinalluvialriversandthusenhancethepredictionofthefinesedimentfluxes,especiallyduringhighstreampowerevents.Basedonapredictiveruleforthecontrolfactormthatonlyinvolveswaterdepth,velocityandbedformconstitutivetexture,thenovelmethodisconfrontedtoobservationscollectedinoneofthemoststronglydynamicalluvialrivernamelytheLowerYellowRiver.Comparisonsbetweentimeseriesofmeasuredandcomputedconcentrationsillustratethatduringhighvelocityeventsthemaindynamicsofthesedimenttransportiscorrectlyreproduced.Themainadvantageofthepresentapproachistosupplyconsistenttimeevolutionsofsedimentconcentrationswithoutmakinguseofanydetailedshearinformation.