简介：Capacitydepletionisanimportantinformationrequiredforplanningofmultipurposereservoirs.Itisacomplexphenomenoninvolvingdiversefieldslikesurfacehydrology,sedimenttransport,variedflowhydraulicsandsoilconsolidation.Properassessmentofcapacityreductionishelpfulinascertainingthelifeofthereservoirandtheprojectbenefitsforcost/benefitanalysis.Inthisstudydimensionallyconsistentequationsfordepositionvolumeandthetrapefficiencyhavebeenobtained.Methodsofobtainingtheparametersinvolvedtheseequationshavealsobeenindicated.Itwasfoundthatthereisgoodagreementwiththefielddata.Itishopedthattheequationsareusefultodesignengineer.

简介：Thispaperre-examinesBagnold’stheoremofsedimenttransport.DifferentfromthestreampowerdefinedbyBagnold,i.e.,τoV,thisstudyshowsthatthetotalloadofsediment-ladenflow,gt,isrelatedtonearbedenergydissipationrate,i.e.,τou*’.Anattemptismadetoexplaintheempiricalrelation.Theratio(=k)ofmeasuredtotalload,gt,totheproductofnearbedvelocity,u*’,andenergydissipationrate,τou*’,isanalyzed.ItisfoundthatkisindependentoftheRousenumber,Z,ifZisgreaterthan2.6,butthecoefficientkdecreaseswiththeincreaseofZwhenZ<2.6.AnempiricalrelationbetweenkandZisdeveloped.Asystematicandthoroughanalysisof1,458setsofdatacollectedfrom16riversandcanalsconfirmsthattheproposedformulacanbeusedtocomputethetotalloadwithaccuracy.

简介：-Basedonthetheoryoflimitanalysis,theFiniteDifferenceMethod(FDM)isestablishedforevaluatingtheultimatebearingcapacityofsubsoilstobeartheunburiedpipelines.Theanalyticalresultsofbearingcapacityoftheidealclayisgiven.Theapproachtobearingcapacityevaluationofcohesionlesssubsoilswithoutsurchargeissuggested.Theresultsfromthismethodareconsistentwiththoseobtainedfrommodeltests.

简介：倾倒区域能力被水动力学过程主要影响(潮汐的沉积，暴风雨巨浪和波浪，等等)象倾倒区域的尺寸和深度一样。在作为FVCOM(有限体积海岸和海洋模型)知道的三维的海洋发行量模型和随机的动态统计分析模型上基于，利用倾倒地面地形学进化并且倾倒数量，讨论水动力学过程和倾倒的活动的影响的作者目的以便造了倾倒区域能力的海洋的一个新模型。与在倾倒的区域的深度和倾倒的数量的数据，底部的变化地志它基于FVCOM水动力学和沉积模块在自然条件下面由潮汐的电流引起了，为倾倒分析变化的统计关系的作者努力总计，潮汐的电流和底部地志。通过到合适的修订系数值，它将被认为是地志的真实数据改变引用波浪和暴风雨影响的价值澎湃。因此在倾倒的能力作为长期的变化拿这评估。在建立底部的阀值的前提地志的变化，倾倒的区域能力被计算。每年拿Yangtze河口号码1作为一个例子倾倒区域，作为由0.5m的水深度还原剂，倾倒的区域能力是模型结果在对实际数量的合理同意的大约670万m3/a,。然后，模型在海湾倾倒区域，Shengsishangchuan山倾倒区域，Dongding倾倒区域，Dongshan倾倒区域，和Wenzhou移植倾倒区域的Luoyuan被验证，它在外面是拐弯结果类似于实际观察的。

简介：Themethodhasbeenestablishedtocalculatetheenvironmentalcapacity(ECo),surplusenvironmentcapacity(SECo)ofwaterwithrespecttomarinepetroleumhydrocarbonsassociatedwithoil(PHAOs)andtheself-purificationcapacity(SPCo)ofmainself-purificationprocesstoPHAOsintheJiaozhouBay,China,accordingtothedynamicmodelfordistributionofmarinePHAOsamongmultiphaseenvironments.ThevariationofconcentrationofPHAOsintheJiaozhouBayiswellsimulatedbythedynamicmodel.Basedonthemodel,theEC.,SEC.ofwaterwithrespecttoPHAOsintheJiaozhouBaywerecalculatedduringthelast10yearsunderthefirst-classandsecond-classqualitystandardrequirement,accordingtoSPCoofmainself-purificationprocesstoPHAOs.Theresultsshowthatabout200tonsofPHAOscouldbedischargedintotheJiaozhouBayformaintainingthefirstclassseawaterqualitystandard,andabout600tonsofPHAOsforthesecondclassseawaterqualitystandardlater.

简介：JellyfishfishingisaspecialtypeoffisherythatmainlyexistsinsomecountriesofEastandSoutheastAsia.Chinahasthelargestjellyfishfisheryyieldintheworldwithanannualharvestofaround300thousandtons.LiaodongBayisthemostimportantjellyfishfisherygroundinChina.However,duetothehighbenefitsofjellyfishfishery,whichleadstoillegalandout-of-seasonjellyfishfishingoccurringeachyearinLiaodongBay.IllegaljellyfishfisheryinLiaodongBayisatypicalexampleofthetragedyofthecommons.Thekeyproblemisthatfishermenseektoanillegallyinitiatejellyfishfishingasearlyaspossible.Inthispaper,basingonthedataofediblejellyfish’sbiologyandecology,wemainlyanalyzedthehistoryofjellyfishfisheryinChina,especiallyinLiaodongbay,andthenwecalculatedthecarrycapacityofediblejellyfishinLiaodongBaywhichisabout300thousandtonsoneyear.ThisnumberisequaltotherecentannualyieldofediblejellyfishinChina.Furthermore,basingonthecarrycapacityandreasonablequotaspriceanalysis,wesetupaJellyfishfishingquotasanddeficitquotasbuybacksystemwhichcouldbeasuitableandeffectivesolutionforjellyfishfisherymanagementanddevelopmentinLiaodongBayattheunderlyingroots.AlthoughChinaisthefirstcountrywithediblejellyfishaquaculture,theannualyieldofjellyfishaquacultureisonlyonefifthofjellyfishfishing.So,thereisaverybrightdevelopingprospectaboutediblejellyfishaquacultureinChina.

简介：Thedegradationstrengthofsoilsundercyclicloadingisstudiedandamethodfordeter-miningthecyclicdegradationstrengthwithcyclictriaxialtestsisgiveninthepaper.Furthermore,adum-mystaticmethodforestimatingtheundrainedbearingcapacityforoffshoresoftfoundationunderwaveloadsisdeveloped.Itcanconsidertheeffectofthedifferenceofcyclicstressfordifferentpartsofthefoun-dationonboththedegradationstrengthofthefoundationsoilandthebearingcapacitysothattheesti-matedresultcanbetterreflecttherealconditionoffoundationundercyclicloading.Themethodcanbeap-pliedtoplaneandspaceproblem.

简介：

简介：气枪来源有是的重要应用一新，环境地在地区性的规模的绿积极来源深exploration.In过去，气枪来源主要在smallscale被使用，高分辨率的浅油探索，但是在深exploration.In顺序有足够的研究的缺乏在深探索学习工作参数的选择和气枪来源的领域条件，这篇论文做下列工作：用气枪实验分析气枪来源的特征；基于免费水泡摆动的理论模仿气枪信号和空气枪数组信号分析水泡摆动的影响并且学习在深探索需要的小浪精力和光谱特征；根据理论模拟，学习工作参数的影响，例如气枪能力，气枪上的工作应力和深度表明并且分析空气枪数组上的不同气枪的启发的时刻和间距表明的气枪数组的影响；并且学习精力思考和传播系数为不同在水下连接，它为选择合适的领域条件是很有用的。

简介：Anenvironmentalcapacitymodelforthepetroleumhydrocarbonpollutions(PHs)inJiaozhouBayisconstructedbasedonfieldsurveys,mesocosm,andparallellaboratoryexperiments.SimulatedresultsofPHsseasonalsuccessionsin2003matchthefieldsurveysofJiaozhouBayresaonablywellwithahighestvalueinJuly.TheMonteCarloanalysisconfirmsthatthevariationofPHsconcentrationsignificantlycorrelateswiththeriverinput.Thewaterbodyinthebayisreasonablysubjectedtoself-purificationprocesses,suchasvolatilizationtotheatmosphere,biodegradationbymicroorganism,andtransporttotheYellowSeabywaterexchange.TheenvironmentalcapacityofPHsinJiaozhouBayis1500tonsperyearIFtheseawaterqualitycriterion(GradeⅠ/Ⅱ,0.05mgL-1)intheregionistobesatisfied.Thecontributiontoself-purificationbyvolatilization,biodegradation,andtransporttotheYellowSeaaccountsfor48%,28%,and23%,respectively,whichmakethesethreeprocessesthemainwaysofPHspurificationinJiaozhouBay.

简介：Evaluationsofresourcesandenvironmentalcarryingcapacities(GRECC)arethepremiseoflandspaceplanningandusecontrol.Resourceallocationsandenvironmentalcapacityarethebasicconditionsthatrestrictdevelopmentinaregion.Inthispaper,basedonasystematicreviewofChina'sgeologicalenvironment,groundwaterresources,mineralresources,othergeologicalresourcesandtheenvironmentalcarryingcapacityresearchstatus,therelationshipbetweenthenaturalresourceenvironmentalsystemandthesocio-economicsystemisstudied.Thena"coordinationtheoryofresourcesandenvironmentalcarrying"isproposed.Next,onthebasisofanevaluationexperimentperformedatdifferentscalesandfordifferenttypesofregions,thetechnicalmethodsforanevaluationofthegeologicalresourcesandenvironmentalcarryingcapacityattheregional(inter-provincial)andprovincialscalesinChinaareestablishedforthefirsttime.Thispaperpresentsastandardizedmethodbasedontechnicalideas,evaluationmethods,andindexsystemsforgeologicalresourceandenvironmentalcarryingcapacityevaluation.Finally,anevaluationofthegroundwaterresourcecarryingcapacityinChinaisusedasanexampleforthedemonstrationofthegroundwaterresourcebackgroundanduseofstateevaluationmethods.

简介：

简介：在在Huaihe河盆(HRB)的humanwater关系中有实质的冲突。没有降级，完成持续经济开发在HRB的水环境，我们开发三维的水环境支持能力(WESC)基于水为环境带能力(WECC)建模，浇环境压力(WEP)，并且浇污染预防和控制能力(WPPC)。地理信息系统有分析层次过程方法和动态加权的求和的空间分析被使用。为为工业的合适的地点和为水的环境保护策略的几个建议被介绍。下列结果被获得。(1)在WECC的空间差别是实质的；有高值的WECC地区的区域主要沿着Huaihe河的主要溪流位于南方方面。WEP通常高，与在整个HRB的污染预防和控制的全面底层。WPPC和WEP显示出由于有更高环境的污染的区域通常有经济开发的高水平的事实的高空间的重叠，并且因此为污染控制有一个强壮的能力。(2)总的来说，WESC在HRB是中等的。特别地，有高WESC价值的区域仅仅在2010说明56.24%HRB。在WESC的不同差别也在位于南方与相比的区域之间存在在盆，和区域的北方在下游的区域与相比在在上游并且中流区域。(3)因而根据为在HRB的工业zoning的指导，在南方并且在的区域下游并且有低WEP值和高WECC和WPPC的亚溪流，传统的工业应该基于严格的环境存取和污染排放标准被开发。当为沿着HRB的中流并且沿着整个Yishusi河盆，有高WEP价值，的区域工业重构并且工艺的升级被建议时。措施应该在被采取限制开发并且在盆的在上游的区域保护环境，它是喝水的关键来源，在沿着South-to-North水转向工程的线的东方线路，并且在生态地易碎的区域盆。，这将包括干净的水的实际存在的预备保证好环境功能同时令人满意调整，转变，并且升级工业结构的迫切需要。

简介：TheextensivedamagetobuildingscausedbytheNepalM_s8.1earthquakehasattractedmuchattentionbytheinternationalcommunity.AfterthepreliminaryscientificinvestigationsonthedifferentaffectedareasinNepal,theconstructionanddamagecharacteristicsoffivedifferenttypesofbuildingscommonlyexistinginNepalwerediscussedandthereasonsoftheirdisasterperformancewereanalyzed.Typesofbuildingsinvestigatedincludereinforcedconcrete(RC)framestructures,rubblestructures,brick-woodstructures,rawsoilstructures,andbrick-woodstructuresofhistoricbuildings.Inaddition,theweaklinksoftheseismicdesignwerepointedout,whichwasveryimportantforthepost-earthquakereconstructionandrecovery,andgaveapreliminaryexplanationsforthedamageexperienced.

简介：Thispaperpresentstwokinematicfailuremechanismsofthree-dimensionalrectangularfootingrestingonhomogeneousundrainedclayfoundationunderuniaxialverticalloadinganduniaxialmomentloading.ThefailuremechanismunderverticalloadingcomprisesaplanestrainPrandtl-typemechanismoverthecentralpartofthelongerside,andthesizeofthemechanismgraduallyreducesattheendsofthelongersideandovertheshortersideasthecornerofrectangularfootingisbeingapproachedwherethedirectionofsoilmotionremainsnormaltoeachcorrespondingsiderespectively.Thefailuremechanismundermomentloadingcomprisesaplanestrainscoopslidingmechanismoverthecentralpartofthelongerside,andtheradiusofscoopslidingmechanismincreaseslinearlyattheendsofthelongerside.Onthebasisofthekinematicfailuremechanismsmentionedabove,theverticalultimatebearingcapacityandtheultimatebearingcapacityagainstmomentormomentultimatebearingcapacityareobtainedbyuseofupperboundlimitanalysistheory.Atthesametime,numericalanalysisresults,Skempton'sresultsandSalgadoetal.'sresultsarecomparedwiththisupperboundsolution.Itshowsthatthepresentedfailuremechanismsandplasticlimitanalysispredictionsarevalidated.Inordertoinvestigatethebehaviorsofundrainedclayfoundationbeneaththerectangularfootingsubjectedtothecombinedloadings,numericalanalysisisadoptedbyvirtueofthegeneral-purposeFEMsoftwareABAQUS,wheretheclayisassumedtoobeytheMohr-Coulombyieldingcriterion.ThefailureenvelopeandtheultimatebearingcapacityareachievedbythenumericalanalysisresultswiththevaryingaspectratiosfromlengthLtobreadthBoftherectangularfooting.ThefailuremechanismsofrectangularfootingwhicharesubjectedtothecombinedverticalloadingVandhorizontalloadingH(VerticalloadingVandmomentloadingM,andhorizontalloadingHandmomentloadingMrespectivelyareobservedinthefiniteelementa

简介：ＳｔｕｄｙｏｎｃｏｒｒｅｌａｔｉｖｉｔｙａｍｏｎｇｃａｐａｃｉｔｙｄｉｍｅｎｓｉｏｎＤ０，ｉｎｆｏｒ－ｍａｔｉｏｎｄｉｍｅｎｓｉｏｎＤ１，ａｌｇｏｒｉｔｈｍｉｃｃｏｍｐｌｅｘｉｔｙＣ（ｎ）ａｎｄｂＶａｌｕｅＷＥＩ－ＢＩＮＨＡＮ（韩渭宾），ＧＵＩ－Ｘ...

简介：水库的存储能力逐渐地由于在能力(ASC)弄弯的区域存储引起变化的沉积累积被减少。建立这些曲线并且预言他们的未来变化是为水坝的规划者，设计者和操作员的一个重要问题。许多实验、半实验的途径为为这些曲线建立并且预言未来变化被建议了。在这研究，四个实验、半实验的方法被评估，他们中的三个被修改由于沉积在ASC曲线被用于变化的预言，基于为在USA的11座水库的存在沉积调查数据。为评估，这些途径被考察并且过去常决定沉积深度并且建立ASC为Mosul水坝水库(MDR)弯，它是在北伊拉克的河底格里斯河上的最大的水力的结构。MDR开始与11.11的一个存储能力在1986操作?km3和水出现区域380?在正常操作舞台的km2(330?ma.s.l)。从这些方法获得的结果用在25年水坝的操作以后在2011被收集了的观察深测术的调查数据被评估。评估结果证明三个方法为关于1.06-3.30%与百分比错误在水坝地点估计水深度或沉积深度介绍了更精确的结果。虽然为建立ASC弯，一个方法与调查数据介绍了好协议结果。而且，在为时期的MDR的水坝地点的ASC和沉积深度50，75，100和125年用修改途径和区域减小方法被估计。当与区域减小相比方法由开垦的美国局求婚了，协议及时随增加变得更好时，修改方法的结果提供了合理同意时期。

简介：热带降雨测量的能力为测量降雨的使命(TRMM)卫星被在南部的中国在一个重降雨实验期间使用TMI-85.5GHz微波影像数据和降水数据检验。从有在有85.5GHz微波的TBB的一个小时的雨数量的分发的比较，大雨的中心与低TBB价值的一个区域相应，是清楚的。7gB分发的地点和形状类似于降水的，并且越大降雨率，越多降低TBB。统计分析证明在TBQ和雨率之间的相关系数否定、重要。特别，当雨率是超过7mm/h时，在TBQ和雨率之间的关联度是更重要的。TRMM/TMI-85.5G举办的结果表演测量对流大雨的极有能力。