简介：

简介：

简介：NowadaysthefasteconomicdevelopmenthasbroughtaboutseriousconflictsbetweenthelimitedlandresourcesandtheincreasinglanddemandinChuzhouCity.Thechangesoflandusestructurealsorestricteconomicdevelopmentandsocietyprogressinthisarea.Becausedifferentcitieshavedifferentfunctionallocalization,thecityareaandeachcounty(city)haveformedcharacteristiclandutilizationstructure.Itisofgreatsignificancetomakerationaluseoflandresourcesandensurethesustainableuseoflandresourcesbyanalyzingthevariationoflandusestructureinthecityareaandeachcounty(city)inChuzhouCity.BasedonthedataoflandusemodificationofChuzhouCityfrom1996to2005andadoptingthequantitativeanalysisoflandscapeecology,thispaperstudiesquantitativelythetemporaldivisionofregionallandusestructureanditsdynamicchanges.Theresultsindicatethat:(1)thismethodcanrevealthelawofthevariation;(2)thevariationoflandusestructureinChuzhouCity:increasingdiversification,evennessandheterogeneity;(3)theintensityofchangeinlandusefrom1996to2005inthecityappearedinthesequence:grassland>trafficland>gardenland>virginland>forestland>industrialandresidentialland>cultivatedland>otheragriculturalland>waterfacilityland;(4)therewereremarkabledifferencesbetweenthecityareaandeachcounty(city)intherelativechangeandthelandusestructurechangefrom1996to2005.ThispaperanalyzesthevariationoflandusestructureinChuzhouCity,andfinallyproposesrelatedcountermeasuresandsuggestions.

简介：Inthispaper,weusetheinterflowareaastheresearchobjectinthelogicalscienceparkforsoilandwaterconservationinJiangxiprovince;andthePaspalumnatatumanditslittercoverareusedasthegroundflora.WediscussesandanalysestheverticaldistributionofrunoffsoastoprovidetheoreticalsupportforthewideapplicationofthePaspalumnatatumforsoilandwaterconservationintheregionofredsoilinsouthChina.

简介：Morletwavelettransformationisusedinthispapertoanalyzethemultitimescalecharacteristicsofprecipitationdataseriesfrom1957to2005inGuyuanregion.Theresultsshowedthat(1)theannualprecipitationevolutionprocesshadobviousmultitimescalevariationcharacteristicsof1525years,712yearsand36years,anddifferenttimescaleshaddifferentoscillationenergydensities;(2)theperiodsatsmallertimescaleschangedmorefrequently,whichoftennestedinabiggishquasiperiodicoscillations,sotheconcretetimedomainshouldbeanalyzedifnecessary;(3)theprecipitationhadthreemainperiods(22year,9yearand4year)andthe22yearperiodwasespeciallyoutstanding,andtheanalysisofthismainperiodrevealsthattheprecipitationwouldbeinarelativehighwaterperioduntilabout2012.