简介：本文研究了长江三峡花岗岩地区林地土壤流失特性．结果表明由鳞片状面蚀导致的土壤流失量月分布与月降雨量的分布趋势基本一致，二者呈现出较为明显的线性相关关系．植物盖度≥０．７０的林地土壤流失多集中发生在６～９月份，土壤流失量在５０００ｔ·ｋｍ－２·ａ－１以下．盖度＜０．７的林地土壤流失年内分布时间多在３～１０月份，土壤流失量为５００～６０００ｔ·ｋｍ－２·ａ－１．

简介：中央东方的美国和中国对增加敏感分别地从密西西比河和长江盆泛滥。这份报纸用31CMIP5(联合模型intercomparison工程阶段5)在这二大河盆对比极端降水的历史、投射的spatialtemporal分发历史的模型和RCP8.5(代表性的集中小径)实验。结果显示出那(1)在两河盆上，当最轻的降水在频率减少了时，最重的降雨事件在最近的十年增加了。在密西西比河盆上，两最轻的降水(<2.5公里/天)并且最重(>50公里/天)当中间的事件更经常发生在未来时，将尤其是在mid-2020s以后在频率减少；而在长江盆上，降水的所有范畴被投射在来十年在频率增加。(2)尽管CMIP5模型的一致能复制域时间平均数和降水的甚至平均时间的空间分发很好，他们没能在空间分发和时间工具两个都模仿降水趋势。以一种类似的方式，模型捕获了降水的统计很好，但是他们在代表不同降水紧张范畴的时间的变化有困难。(3)记录得好在二河盆上冷却的第20世纪表面夏天的第二一半在美国区域上与在他们之间的更高的反关联与降水趋势显示出不同协会，暗示贡献二河盆的冷却机制的不同过程。

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简介：TheVRDSfeedstockprocessedinrefineriesalongtheYangtzeRiverhasspecialcharacteristics,includinghighFeandCacontent,andlowsulfurandhighnitrogencontent.Dependinguponfeedstockpropertiesandoperatingconditions,someapproacheshavebeendevelopedbytheSINOPECResearchInstituteofPetroleumProcessing(RIPP),whichincludeinstallingthedecalcificationfacility,developingnewguardcatalystsandHDCCRcatalysts,implementinganewcatalystgradingapproach,developingahighlyefficientdistributiontechnologyandapplyingRICPprocessinsomerefineries.Theapplicationeffectshaverevealedthattheintegratedtechnology,whichcanbeconducivetothelong-cycleoperationdevelopedbyRIPP,canmaximizethedepositsuptakecapacityoftheguardreactorandtheactivityofgradingcatalysts.

简介：三的大楼塞满水坝(湖北()省，中国)在一特别短的时间以内基于持续农业与经济把一个区域转变几千年了成完全不同的环境。这破坏碳，营养素，和金属并且可能的自然biogeochemical周期将包括下游的生态系统影响整个集水，例如沼泽地，河口，三角洲，和邻近的海区域。从已经被记录了的变化开始，这篇文章专注于FerryBox的可能的使用，它是在一艘轮船上或在岸上的一个自动化水质量测量系统，为了监视河的质量的短、长期的发展，水坝在回水区域并且下游地流水。当已经有时，研究规划运行监视河和回水区域的水质量，这些程序被限制与采样和实验室分析装运运动。如此的大小的空间、时间的分辨率不为对水质量的一个全面评价并且为在上下文的预测是足够的人为并且气候变化。因此，由FerryBox使用常规自动化观察的一个概念被介绍。如此的系统很好被适合给反馈让对措施的评价改进水质量，这被显示出。

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

简介：P—地区性的气候用一个parameterization计划建模说明亚格子的热效果的σ可伸缩山志学被用来模仿在1991的mei-yu时期期间发生在长江山谷以内的三个重降雨事件。模拟结果由考虑亚格子规模地形学计划显示出那，一个人能显著地为在这三个重降雨事件期间模仿雨量分布和紧张改进模型的表演，最特别第二和第三。降雨主要由于对流降水，这也被发现。在实验之间的比较，有或没有亚格子规模地形学的任何一个策划，证明用计划的模型在850hPa水平和上升运动和在长江山谷上在500hPa定位的潮湿集中中心复制了集中紧张和分发。然而，一些偏差仍然在大气的水分含量，集中分发和潮湿交通线路的模拟存在，它主要导致更低的模仿的降水层次。模拟结果的进一步的分析证明亚格子地形学计划修改了表面精力预算部件的分发，特别在南方和西藏的高原的西南边，导致发展和在700hPa的否定重力势高度差别和积极温度差错率差别的东方繁殖，它可能在东方中国上导致了改进降水模拟。

简介：Basedonthespatialeconomytheoryandtheexploratoryspatialdataanalysis(ESDA)technology,thispa-perstudiesthespace-timedynamicsofregionalpercapitaGDPintheYangtzeDelta.Asampleof74regionsintheYangtzeDeltaovertheperiodof1994to2004providesclearevidenceofglobalandlocalspatialautocorrelationaswellasspatialheterogeneityinthedistributionofregionalpercapitaGDP.Thedynamismofregionsisinvestigatedbyexploringthespatialpatternofregionalgrowth,comparedwiththatbefore1997,theeconomicgrowthdisparitiesamongShanghai,ZhejiangandJiangsuprovinceshavedecreased,sohavetheinsideregionsofZhejiangProvince,whileitisoppositetotheinsideregionsofJiangsuProvince.

简介：ObjectiveTheEmeishanlargeigneousprovince(ELIP)inSWChinaistheonlyonelargeigneousprovinceinChinarecognizedbyinternationalgeologists.PreviousstudiesofELIPoverpasttwodecadesindicatethattheELIPage,duration,scaleandgenerationmechanismarestillcontroversial.Amongthosescientifictopics,some

简介：摘要：农田灌溉发展对于提升农田灌溉保障能力，助力“小田变大田”改革，完善农田水利“最后一米”有着十分重要的意义，文章以铜陵市义安区为例，分析沿江地区农田灌溉发展思路。

简介：DuringtheEarly-MiddleProterozoicera,threemajorlithostratigraphicunitassociations,namelyHekou-Dahongshan,Dongchuan,andKunyang-HuiliGroups,wereestablishedforthemetamorphosedvolcanicsedimentaryrocksexposedinthesouthwesternYangtzeBlock(SWYB).Theintegrationofpetrology,geochemistryandgeochronologyconstrainstectonicframeworkandevolutionoftheSWYB,inwhichfoursetsofSHRIMPU-PbzirconageswereobtainedfromthevolcanicrocksinterbeddedwithintheMiddleProterozoicsuccessions:1800-1600Ma,1600-1300Ma,1300-1100Ma,and1100-1000Ma.Majorandtraceelementalanalysisindicatethatfourkeytectonicevolutionarystages,eachcoincidingwiththeaboveradiometricageset,oftheSWYBduringtheEarly-MiddleMesoproterozoic.TheSWYBwascharacterizedbyaneast-westerlytrendingriftintheHekou,Dongshan,andDongchuanareas,andseparatebasin-formingeventsduring1800-1600Maarid1600-1300Ma,respectively.IntheSWYB,anintracontinentalriftbasinandariftbasinoccurredintheCaiziyuan-MatangandLaowushanareas,respectivelyin1300-1100Maago.During1100-1000Ma,theSWYBwascharacterizedbytheclosureoftheCaiziyuan-Matangrift-oceanbasin,collisionbetweentheHuiliBlocksandKunyangBlocks,andpresenceofvolcanicaresintheTianbaoshanandFulingpenareas.Accordingly,theSWYBrepresentsanewbasinthatrecordstherelativelycompleteassemblyprocessoftheRodinaduringtheEarly-MiddleMesoproterozoicera.

简介：从Changjiang河(长江)河口，Hangzhou海湾，和他们的邻近的水的表面沉积为他们的谷物尺寸分发，器官的碳(OC)集中，和稳定的碳同位素作文被分析(13C)。把分析基于这，大约36件表面沉积样品从各种各样的环境被选择并且分开了成沙(>0.250公里，0.1250.250公里，0.0630.125公里)并且淤泥(0.0250.063公里)由湿筛的分别方法的部分，并且推进进淤泥--(0.0040.025公里)并且泥土大小(<0.004公里)由离心的分别的部分。六个谷物尺寸范畴的沉积为他们的OC和13探索谷物的C内容在学习区域缩放沉积OC的作文和运输路径。从对粗糙的部分好，分别地，OC内容是1.18%，0.51%，0.46%，0.42%，0.99%，和0.48%当时13Cwas21.64,22.03,22.52,22.46,22.36，and22.28分别地。在每个尺寸范畴，OC贡献分别地是42.96%，26.06%，9.82%，5.75%，7.09%，和8.33%。在泥土和好淤泥部分的OC内容(<0.025公里)是大约69.02%。高OC集中主要被发现在近海在Changjiang河河口的东北，在在Changjiang河和Hangzhou海湾的更低的河口的现代沉积，并且在气旋的埃迪的现代沉积现代沉积到济州岛的西南。与13体积沉积的C显示在Changjiang河河口的陆上的器官的材料是搬运朝海的方向并且经由二条小径驱散现代沉积到气旋的埃迪到济州岛的西南：一个人是Changjiang河的结果冲淡的水(CDW)北方江苏沿海的水流和黄海沿海的水流驾驶的向东北的延长分支，当另一个是CDW的结果时台湾温暖的水流驾驶的向南方的延长分支。

简介：对加速河建水坝和灌溉的Yangtze三角洲反应是全球担心的一个话题。这研究分析了沉没三角洲前面，在不同分区的时间空间的变化模式，在典型剖面图的geomorphological变化，和四个主要分区的geomorphological原因的一般侵蚀生长(Chongming厘米的东方潮汐的沼泽地，Hengshashoal-HS，Jiuduanshawetland-JDS，并且Nanhui-NH的东方潮汐的沼泽地)。数据来源包括测量在的地志的数据高分辨率，在Datong车站的沉积负担，和相应河口构造信息。主要调查结果是：(1)一般来说，学习区域稍微侵蚀了(侵蚀区域比率是51.83%，生长区域比率是48.17%)从1982～2010，并且它经历了erosion-accretion-erosion的移动。地形学的时间空间的变化在八个分区也是重要的，排除在北方隧道的经常的侵蚀；(2)在在NH的5m深线以内的东方、北的厘米和HS，北JDS，和这个区域的进化被垂直免职统治，它在南部的厘米和HS是那的反面，并且在东方、南部的JDS的5m深线以内的区域；(3)总体上，2m的包含的表面区域(ESA)和5m，深线不停地增加，并且年度生长率在19822010期间分别地到达了10.42km2/yr和7.99km2/yr(然而，四个分区展出了争论)，并且在整个区域和所有分区，10m深线的ESA减少了，当15m深线的ESA在时期期间稍微变化了并且仍然保持稳定时；(4)是更少由设计的河口影响了，厘米是深线的ESA根据沉积负担的衰落减少了的唯一的分区。主要结论是河口工程工程在对沉积负担，ESA的变化和深线的分发的减小的宏背景影响沉没三角洲起一个日益重要的作用。与国际发货中心和开垦投射的上海的加速的构造一起，沉没三角洲的geomorphological进化将变得更复杂并且因此值得以后的经常的监视。

简介：TheDeepSeismicSounding(DSS)projectscarriedoutfromthe1970sinthelowerYangtzeregionanditsneighboringareawerereviewedinthispaper,thenthebasicwavegroupfeaturesofthosewideanglereflection/refractionrecordsections,andofthecrustalstructurearesummarized.Itshowsthattherewereintotalfiveclearwavegroupsontherecordsections,whichincludethefirstarrivalPg,thereflectionP1fromthebottominterfaceoftheuppercrust,thereflectionP3fromthebottominterfaceofthemiddlecrust,thestrongreflectionPmfromtheMohoboundary,andtherefractionPnfromuppermostmantle.Ingeneral,thesephasesareeasilyconsistentlytracedandcompared,despitesomefirstarrivalsbeingdelayedorarrivingearlierthannormalduetotheshallowsedimentarycoverorbedrocks.Inparticular,intheDabieMountainregiontheseismiceventsofafewgatheredshotsalwayshaveweakreflectionenergy,aretwisted,orexhibitdisorganizedwaveforms,whichcouldbeattributedtothedisruptionvariationsofreflectiondepth,thebrokenMoho,andthediscontinuityofthereflectionboundarywithincrust.Theregionalcrustalstructuresarecomposedoftheupper,middleandlowercrust,ofwhichthemiddleandlowerlayerscanbedividedintotwoweakreflectionones.ThecrustalthicknessoftheNorthChinaandYangtzeplatformare30km-36km,andtheMohoexhibitsaflatgeometrydespitesomelocaluplifts.Theaveragepressurevelocityinlowercrustbeneaththistwotectonicareais6.7±0.3km/s.Nevertheless,beneaththeDabieshanareathecrustalthicknessis32km-41km,theMohobendsdownsharplyandtakesanabrupt4km-7kmdislocationintheverticaldirection.TheaveragepressurevelocityinthelowercrustbeneaththeDabieshanareais6.8±0.2km/s.

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。

简介：多级式的变丑事件发生在东北Jiangshao差错(缝术)带。二年代初是可锻的变丑事件。第一是ca。820妈top-to-the-northwest可锻的推进，它直接在迟了的Neoproterozoic期间源于在Cathaysia旧陆地和Chencai弧(?)之间的碰撞，并且作为海洋形成了的JiangnanOrogenic带由于连续压缩在Yangtze板和连接Cathaysia旧陆地和Chencai弧之间关门了。第二是可锻左侧面滑倒罢工那发生了在最近早古生代。自从Jinning时期，所有变丑事件由于在诺思中国和Yangtze盘子之间的碰撞代表intraplate结构的复活或倒置在期间三叠纪并且在菲律宾的海和欧亚的盘子之间在新生代期间。因为在诺思中国和Yangtze盘子之间的碰撞，在三叠纪的、易碎的权利侧面的滑倒罢工、随后的top-to-the南方，推进沿着整个东北Jiangshao差错地区发生了。在迟了的中生代，地区性的扩展越过东南的中国发生了。在新生代，在菲律宾的海和欧亚的盘子之间的碰撞沿着整个Jiangnan旧陆地导致了易碎的戳在中新世。Jiangshao差错带是在有长历史的外壳中的一个弱地区，并且它的复活是在华南的变丑的重要特征之一；然而，迟了阶段的变丑事件没在Jiangnan旧陆地以外发生，他们中的大多数与旧陆地的罢工平行，它类似于在中亚的新生代变丑。另外，Jiangnan旧陆地不是在Yangtze板和Cathaysia旧土地之间的一条collisional边界在三叠纪。

简介：AbstractBackground:Oncomelania hupensis is only intermediate snail host of Schistosoma japonicum, and distribution of O. hupensis is an important indicator for the surveillance of schistosomiasis. This study explored the feasibility of a random forest algorithm weighted by spatial distance for risk prediction of schistosomiasis distribution in the Yangtze River Basin in China, with the aim to produce an improved precision reference for the national schistosomiasis control programme by reducing the number of snail survey sites without losing predictive accuracy.Methods:The snail presence and absence records were collected from Anhui, Hunan, Hubei, Jiangxi and Jiangsu provinces in 2018. A machine learning of random forest algorithm based on a set of environmental and climatic variables was developed to predict the breeding sites of the O. hupensis intermediated snail host of S. japonicum. Different spatial sizes of a hexagonal grid system were compared to estimate the need for required snail sampling sites. The predictive accuracy related to geographic distances between snail sampling sites was estimated by calculating Kappa and the area under the curve (AUC).Results:The highest accuracy (AUC = 0.889 and Kappa = 0.618) was achieved at the 5 km distance weight. The five factors with the strongest correlation to O. hupensis infestation probability were: (1) distance to lake (48.9%), (2) distance to river (36.6%), (3) isothermality (29.5%), (4) mean daily difference in temperature (28.1%), and (5) altitude (26.0%). The risk map showed that areas characterized by snail infestation were mainly located along the Yangtze River, with the highest probability in the dividing, slow-flowing river arms in the middle and lower reaches of the Yangtze River in Anhui, followed by areas near the shores of China’s two main lakes, the Dongting Lake in Hunan and Hubei and the Poyang Lake in Jiangxi.Conclusions:Applying the machine learning of random forest algorithm made it feasible to precisely predict snail infestation probability, an approach that could improve the sensitivity of the Chinese schistosome surveillance system. Redesign of the snail surveillance system by spatial bias correction of O. hupensis infestation in the Yangtze River Basin to reduce the number of sites required to investigate from 2369 to 1747.

简介：以前的学习来到结论：基于南方亚洲人高度(SAH)的异例，在热带、副热带的区域上的100-hPageopotential高度，和100-hPa循环，我们能在长江山谷和诺思中国预言降水异例。测试它的有效性，一系列实验被设计了并且操作，它包括控制实验，敏感实验(它增加了异例进100-hPageopotential高度和风地)，并且四合成的实验。基于象EPR-CF，EPRCD，EPR-HF，和EPR-HD那样的镇静的起始的领域试验，能在长江山谷和诺思中国复制洪水或干旱。它建议在热带、副热带的区域上的SAH，100-hPageopotential高度，和发行量的异例可以可能在二个区域暗示夏天降水异例。SAH，100-hPageopotential高度，和西南的异例流动在以前的时期的敏感实验结果表演是干旱或洪水的一个信号在长江山谷和诺思中国的下列夏天。并且它也是在二个区域在夏天降水异例上有影响的因素之一。100-hPageopotential高度并且SAH和西南流动的异常加强的积极异例将在诺思中国在长江山谷和干旱导致洪水；当100-hPageopotential高度并且SAH和西南流动的异常变弱的否定异例将在诺思中国在长江山谷和洪水导致干旱时。[出版摘要]

简介：ViathevaluableopportunityoftheThreeGorgesReservoir(TGR)135-mfillinginJune2003,theYangtzedischargeandsuspendedsedimentconcentration(SSC)enteringtheestuaryduringtheperiodfrom15Mayto15July2003wereanalyzedtoexaminetheinstanteffectsofthefillingonthem.TheYangtzedischargeandSSCenteringtheestuaryintheperiodsbefore,duringandafterthefillingclearlyindicatedthreephases:1)thepre-storagephasecharacterizedbynaturalconditions,inwhichtheSSCincreasedwithincreasingwaterdischarge;2)thestoragephase,duringwhichtheSSCdecreaseddramaticallywithdecreasingwaterdischarge;and3)thepost-storagephase,duringwhichboththeSSCandwaterdischargeremainedatrelativelylowlevelsfirstuntiltheendofJune,thentheSSCincreasedgraduallywithincreasingwaterdischarge.ItseemsthatthetimesfortheinstanteffectsofthedecreasingdischargedownstreamfromtheupperYangtzeontheYangtzedischargeandSSCenteringtheestuaryduetotheTGR135-mfillingtotakeplacewereabout5dand1drespectively,whilebothwereabout18dforthoseoftheincreasingdischarge.Thisprobablyreflectsthebufferingandresultantlyhysteresisofthe1800-kmstretchfromtheupperYangtzetotheestuary.TheresultsarehelpfulforscientificandhydrologicalinvestigationoftheYangtzemainstreamdownstreamfromtheTGRDamandoftheestuarineandadjacentcoastalwaters.