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简介：Palaeo水文学领域调查在Jinghe河的中间的活动范围被执行。一套palaeofloodslackwater存款床在河岸在Holocene黄土土壤顺序被识别。沉积样品从侧面，和粒子尺寸分发被收集，磁性的危险性，loss-on-ignition在实验室被分析。分析结果证明palaeofloodslackwater存款在Jinghe河山谷记录了非凡的洪水事件。根据stratigraphic关联并且OSL标明日期，palaeoflood事件被标明日期到41004000一BP。palaeoflood山峰分泌物被估计是由使用水文学模型的19,41022,280m3/s并且由不同途径检查。这些结果把Jinghe河的洪水数据顺序扩大了到10,000年的时间规模。它在Jinghe河排水盆为水力的工程并且为洪水危险的缓解提供了重要数据。

简介：Thereisanobviousdeparturefromtheregionalequi-libriumofdevelopmentsbetweentheupperandlowerreachesofthePearlRiverinGuangdong,whichresultedin'theeffectsofcontra-geography-gradsdevelopment'.Itismainlybecausetheuprivermountainousareashavebeendeeplystuckinindustriali-zationdelayandmarginalizationplights,sothatnearly40millionlocalpeoplehaveconceivedadreamtogetridof'theviciouscircleofpoverty'byspeedingupindustrialdevelopment.Buttheproblemisthatsuchindustrializationeffortsonalargescaleinmountainousareasareencounteringthebottleneckofenviron-mentalcapacitythatstrictlylimitsindustrialemissionsalongtheupperreachesofanywatersystem.Asasolution,aninstitutionalarrangementcalled'theLocalAreaQuotasforIndustrialEmis-sionsalongthePearlRiver'isputforwardsupposedtogivecor-respondingcompensationtotherightsofindustrialdevelopmentyieldedbysomeareaswithlowerenvironmentalcapacitythroughthedistributionandtradingofIDQs.

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简介：Thirteensedimentcoresamples(0-10cm)weretakenfromthesevenlakesinthemiddleandlowerreachesoftheYangtzeRivertodeterminethecontentsanddistributionsoforganicphosphorus(P)fractionsinthesedimentsoftheshallowlakesinthearea.TheorganicPfractionsinthesedimentswereintheorderofmoderatelylabileorganicP(MLOP)>moderatelyresistantorganicP(MROP)>highlyresistantorganicP(HROP)>labileorganicP(LOP),withaverageproportionalratiosof13.2:2.8:1.3:1.0.LOP,MLOP,andMROPweresignificantlyrelatedtothecontentsoftotalorganiccarbon(TOC),water-solubleP(WSP),algal-availableP(AAP),NaHCO3-extractableP(Olsen-P),totalP(TP),organicP(OP),andinorganicP(IP).However,HROPwassignificantlyrelatedtoOPandweaklycorrelatedwithTOC,WSP,AAP,Olsen-P,TPorIP.ThissuggestedthatorganicP,especiallyLOPandMLOPinsediments,deservedevengreaterattentionthanIPinregardstolakeeutrophication.IntermsoforganicP,sedimentsweremorehazardousthansoilsinlakeeutrophication.AlthoughOPconcentrationswerehigherinmoderatelypollutedsedimentthanthoseinheavilypollutedsediment,LOPandMLOPwerehigherintheheavilypollutedsediment,whichindicatedthatheavilypollutedsedimentwasmorehazardousthanmoderatelypollutedsedimentinlakeeutrophication.

简介：TheTaoerRiverbasinistheepitomeinthewestofNortheastChinaanditisoneofthemostfragileandsensitiveecoregions.Thus,protectionofwaterqualityoftheTaoerRiverisimportant.Notonlypointsourcepollutionbutnon-pointsource(NPS)pollutionresultsindeterioratingwaterquality.Inthisstudy,long-termhydrologicimpactassessmentmodelwasusedtoevaluatetheimpactsoflandusechangeimpactsonNPSpollution,andthereplacementcostmethodwasusedtocalculatetheeconomiclosscausedbyNPSpollution.ThroughanalyzingtheNPSpollutantloadsofdifferentlandcategoriesandtheeconomicloss,thearticleputsforwardthatthereexistsacloserelationshipbetweenland-usetypesandNPSpollution,andagriculturalpollutionisthemaincomponentoftheNPSpollutioninthisarea.Theresultsofthisstudycanprovidedecision-makingbasisforagriculturaldevelopmentandland-usechange.

简介：Thepaperdealswiththebackgroundfeatures,formationanddistributionofthechemicalel-ementsK,Na,Ca,Mg,Si,Fe,Mn,Cr,Ni,V,Co,Ti,Mo,Cu,Pb,Zn,As,Hg,Cd,Be,Li,Sr,B,F,Cl,BrandIinthegroundwaterintheregionofthemiddleandlowerreachesoftheYangtzeRiverandtheirrelationstothecompositionofthewater-bearingmedia,propertiesoftheoverly-ingrocksandsoils,redoxenvironment,andgroundwaterflowcondition,mineralizationandpHofgroundwater.

简介：ThisstudyexaminedtherainfallaroundthemiddleandlowerreachesoftheYangtzeRiverandrelatedatmosphericcirculationbyusingNCEPreanalysisdata.Thepurposeofthisstudyistoanalyzetheirdecadalvariationandtherelationshipamongrainfall,atmosphericcirculationaroundEastAsiaandtheENSOepisodes.Currentresultsarepresentedasfollows:(1)VeryclearincreasingtrendoftherainfallaroundthemiddleandlowreachesoftheYangtzeRiverduringtheMeiyuperiodandJunetoJulyisfoundintherecent15years.Meanwhile,thegeopotentialheightat500hPaaroundtheOkhotskSeaalsoholdssimilarincreasingtrend.ItisnoticeablethatENSOepisodestendtooccurmorefrequentlyintherecent15years.(2)AnindexdescribingEastAsiansummermonsooniswellcorrelatedwiththeSSTintheNino-3regioninprecedingautumnintherecent20yearsbutisnotpriortotheperiod.ThismeansthattheElNinophenomenonexertsmoreimpactsonEastAsiansummermonsoonrecently.(3)ThewarmphaseofPDOintherecent20yearsbasicallycoincideswiththeincreasingtrendoftheatmosphericcirculationinEastAsia.

简介：Supportedbygeographicalinformationsystem,usingCostanzamethodandreferringtoterrestrialecosystemservicevalueinChina,theinfluenceoflanduseandlandcoverchange(LUCC)between1980and2000onecosystemservicevalueintheupandmiddlereachesofDongtingLakebasinwasanalyzedinthisstudy.Theresultsshowedthattheestimatedvalueofecosystemservicesdecreased8.4169×108CNYovera21-yearperiod,andthemainreasonswerethatthelandforforestusewasexploitedforcroplandandconstructionlanduseinstudyarea.Furtheranalysisresultsshowedthatthevalueofsingleecosystemservicefunctionsuchasgasregulation,climateregulation,soilformationandconservation,biodiversityconservation,rawmaterialsaswellasrecreationdecreasedsignificantly;andthatofprovisionofwaterconservation,wastetreatmentandfoodproductionincreasedobviouslyinthearea.Theresultsofcoefficientsensitivityanalysisindicatedthattheseestimateswerereliable.

简介：ThedeforestationonlargescaleintheupperreachesofYangtzeRiverhascausedseriousproblemsofecosystemandenvironment.Restorationofthedegeneratedforestecosystemsisoneofthemainresearchfields.TakingGonggaMountainasanexample,degenerationfeaturesandexistingproblemsofforestecosystemsareanalyzedinthispaper,andthemeasuresarealsoproposed.

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简介：由于它在集成地区性的协调开发并且提高华中的上升的大战略意义，在Changjiang(Yangtze)河的中间的活动范围的城市的凝块从理论、实际的方面吸引了许多注意。对区域经济网络结构的如此的研究为城市发展、地区性发展的策略的形成是有益的。这篇论文基于一个修改引力模型构造一个经济领带模型。随后，指社会网络分析，论文以经验为主地学习网络密度，网络中心性，亚群和Changjiang河城市的凝块的中间的活动范围的结构的洞经济网络。调查结果是四折的：(1)在Changjiang河的中间的活动范围的城市的凝块的一个经济网络被形成了，并且在在这个网络的城市之间的经济关系是比较地稠密的；(2)在Changjiang河的中间的活动范围的城市的凝块能被划分成四重要亚群，与有它的自己的明显的经济通讯的每亚群，当在亚群之中有不太经济行为的异质时，这为在波伊昂·莱克存在的二亚群是特别真的生态的经济地区；(3)由武汉，长沙和南昌的中央城市驾驶的一个经济模式出现在Changjiang河的中间的活动范围的城市的凝块，当这三个首都的城市施加了大放射能力到他们的包围城市时，后者不太能从前者吸收资源；(4)武汉大城市的区域和波伊昂·莱克生态的经济地区比长沙，Zhuzhou和Xiangtan城市簇的戒指有更结构的洞，意味着在这二个区域的圆周的城市是容易由中央城市抑制了。长沙，Zhuzhou和Xiangtan城市的戒指聚类有更少结构的洞；因此，在这个区域的城市不在另外的二个区域与那些比面对同样多限制。

简介：沿着东方指南盆，东北西藏的高原，和他们的作文，形成过程，和辩论的似地球形状的进化遗体的黄河(年)的几个陶土的平台谎言。用域调查数据，测试的样品，和高分辨率的遥感图象，Erlianmudflow扇子的进化被分析。数据表演也上的扇子之间的重要差别YR站在一起。在正确银行上，扇子是冲淡碎片流动由沙和石子组成。在左银行上，扇子是由红泥土组成的粘性mudflows。左银行平台的作文和形成过程显示一处导致降雨的雨的风景。扇子进化能被划分成二个舞台：早阶段的扇子早于16kaB.P，并且在最后冰川的消失期间形成了；迟了阶段的扇子填迟8kaB.P。两个阶段被气候变化导致。数据显示在最后冰川的最大值期间，东北西藏的高原经历了高降雨描绘的冷、潮湿的气候。从16-8ka，YR通过Erlian早mudflow扇子切了，导致广泛的侵蚀。自从8ka，河隧道由至少1.25km，和迟了的舞台mudflow扇子形成向南移居了发生了。

简介：Soilsalinityandhydrologicdatasetswereassembledtoanalyzethespatio-temporalvariabilityofsalinizationinFengqiuCounty,HenanProvince,China,inthealluvialplainofthelowerreachesoftheYellowRiver.Thesalinesoilandgroundwaterdepthdataofthecountyin1981wereobtainedtoserveasahistoricalreference.Electricalconductivity(EC)of293surfacesoilsamplestakenfrom2km×2kmgridsin2007and40soilprofilesacquiredin2008wasanalyzedandusedforcomparativemapping.OrdinarykrigingwasappliedtopredictECatunobservedlocationstoderivethehorizontalandverticaldistributionpatternsandvariationofsoilsalinity.Groundwatertabledatafrom22observationwellsin2008werecollectedandusedasinputforregressionkrigingtopredictthemaximumgroundwaterdepthofthecountyin2008.ChangesinthegroundwaterlevelofFengqiuCountyin27yearsfrom1981to2008wascalculated.Twoquantitativecriteria,themeanerrororbias(ME)andthemeansquarederror(MSE),werecomputedtoassesstheestimationaccuracyofthekrigingpredictions.Theresultsdemonstratedthatthesoilsalinityintheuppersoillayersdecreaseddramaticallyandthetaxonomicallydefinedsalinesoilswerepresentonlyinafewmicro-landscapesafter27years.Presently,thesoilswithrelativelyelevatedsaltcontentweremainlydistributedindepressionsalongtheYellowRiverbed.Thereductioninsurfacesoilsalinitycorrespondedtothelocationswithdeepenedmaximumgroundwaterdepth.Itcouldbeconcludedthatgroundwatertablerecessionallowedwatertomovedeeperintothesoilprofile,transportingsaltswithit,andthusplayedanimportantroleinreducingsoilsalinityinthisregion.Accumulationofsaltsinthesoilprofilesatvariousdepthsbelowthesurfaceindicatedthatsecondarysoilsalinizationwouldoccurwhenthegroundwaterwasnotcontrolledatasafedepth.

简介：AfteroperationoftheThreeGorgesProject(TGP),thereisanewevolutiontendencyforriversandlakesinthemiddlereachesoftheYangtzeRiver(i.e.theChingRiverreaches).Inrecentyears,theweakeningconnectionrelationshipbetweentheYangtzeRiverandDongtingLakehasresultedinaseriesofproblemsforfloodregulation,waterresourcesutilization,andaquaticecosystemprotectionintheriver-lakejointarea.Inthispaper,thehydrologicalcharacteristicsandfluvialprocesseswithintheriver-lakejointareaarestudied,andpossiblemanagementstrategiestomaintaintheconnectedriver-lakerelationshipareproposed.Toachievethisobjective,theevolutiontendency,suchasthezero-flowproblemandriverregimeforthreemajoroutlets(i.e.theSongziOutlet,TaipingOutlet,andOuchiOutlet)toDongtingLakefromtheYangtzeRiver,isanalyzed.ItisbelievedthattheSongziOutlethasacomparativeadvantageinflowdiversionovertheothertwooutlets.TheRangeofVariabilityApproachisintroducedtoidentifyhydrologicalcharacteristicsattheSongziOutlet.Severalcharacteristicvaluesofflowdiversionfromthisoutletduringdroughtperiodsaredetermined.Then,thefluvialprocessesintheriver-lakejointareaarestudiedbycomparingtopographicmapsandusingcontrolgaugestationdataofvariousyears.ThewaterandsedimentfluxareanalyzedbeforeandafteroperationoftheTGP.Finally,basedontheresultsobtained,twopossiblemanagementstrategiesarerecommendedandcorrespondingparametersareestimatedtostrengthenandmaintaintheconnectedriver-lakerelationship.ThisanalysistakesintoaccountoperationoftheTGP,mainstreamshiftandincreasingriverbedscourintheChingRiverchannel.Torestoretheflowdiversionconditiontothatinthe1950sor1960s(i.e.140m3/sofflowdiversioncorrespondingto5500m3/sofflowattheZhichengstation),itisestimatedthattheriverchannelaroundtheSongziOutletshouldbedredged1.4munderthecurrentriverbedsituatio

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简介：(1)SAM断然在Yangtze的中间、更低的活动范围与Mei-yu相关很好以便强壮的春季SAM被更多的降雨在河并且反过来也如此的ther各个在Mei-yu跟随。(2)SAM否定地与SST相关很好近海中国以便当时，强壮的春季SAM以后被近海的低SST和弱夏季风在东亚伴随高SST近海被强壮的夏季风在东亚跟随。(3)强壮的异常春天SAM的Inthe年，重要风切变在Yangtze的中间、更低的活动范围上统治空气的中间和底层；在弱异常春天SAM的年里，shear是到在诺思中国上的北方的更多。(4)怎么在Yangtze的中间、更低的活动范围上做SAM锁子甲Mei-yu降雨？为他们的关联的内部机制是什么？他们仍然保持不清楚并且需要推进学习。

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