简介:WemappedtheforestcoverofKhadimnagarNationalPark(KNP)ofSylhetForestDivisionandestimatedforestchangeoveraperiodof22years(1988-2010)usingLandsatTMimagesandotherGISdata.SupervisedclassificationandNormalizedDifferenceVegetationIndex(NDVI)imageclassificationapproacheswereappliedtotheimagestoproducethreecoverclasses,viz.denseforest,mediumdenseforest,andbareland.Thechangemapwasproducedbydifferencingclassifiedimageriesof1988and2010asbeforeimageandafterimage,respectively,inERDASIMAGINE.Errormatrixandkappastatisticswereusedtoassesstheaccuracyoftheproducedmaps.Overallmapaccuraciesresultingfromsupervisedclassificationof1988and2010imagerieswere84.6%(Kappa0.75)and87.5%(Kappa0.80),respectively.Forestcoverstatisticsresultingfromsupervisedclassificationshowedthatdenseforestandbarelanddeclinedfrom526ha(67%)to417ha(59%)and105ha(13%)to8ha(1%),respectively,whereasmediumdenseforestincreasedfrom155ha(20%)to317ha(40%).ForestcoverchangestatisticsderivedfromNDVIclassificationshowedthatdenseforestdeclinedfrom525ha(67%)to421ha(54%)whilemediumdenseforestincreasedfrom253ha(32%)to356ha(45%).BothsupervisedandNDVIclassificationapproachesshowedsimilartrendsofforestchange,i.e.decreaseofdenseforestandincreaseofmediumdenseforest,whichindicatesdenseforesthasbeenconvertedtomediumdenseforest.Areaofbarelandwasunchanged.Illicitfelling,encroachment,andsettlementnearforestscausedthedenseforestdeclinewhileshortandlongrotationplantationsraisedinvariousyearscausedtheincreaseinareaofmediumdenseforest.ProtectivemeasuresshouldbeundertakentocheckfurtherdegradationofforestatKNP.
简介:Forthepurposeofofforestation,planninganddevelopmentintheThree-NorthRegion,aseriesof6LandsatTMscenesfrom1996to1997wereusedtoclassifyland-useconditionsinthewholeKorqinSandyLandsateasternpartofInnerMongolia,China,withanareaofabout430×306squarekilometers.Lateron,Siteclassiflcationwasmadeandmappedforthe4southernsandycounties.Theannotationsymbolforeachagglomerationofsiteconditioniscomprisedofsixparts:landunit,landusepattern,soi...
简介:ThestudywasconductedtoevaluateeffectofratiooffacetocoreparticlesonmechanicalandphysicalpropertiesoforientedstrandboardproducedfromEthiopianhighlandbamboo.Three-layeredorientedparticleboardsweremanufacturedwith4proportionsoffacetocoreparticlesat750kg/m~3targetdensity.Tenpercentureaformaldehyderesinwasusedasabinder.StrengthanddimensionalstabilityperformancesofallboardswereassessedbasedonISOstandards.Theresultsshowedthatmodulusofrupture...
简介:1.赣、闽、渝、晋四省(市)森林公安编制、经费问题取得重大突破2003年12月18日,下发后,各地认真学习,积极贯彻落实,尤其是在所属林业厅(局)党组、公安厅(局)党委强有力的领导下,在有关部门的大力支持下,部分省(市)森林公安编制、经费取得一系列重大突破.2004年8月27日,中共江西省委、江西省人民政府出台的(赣发[2004]19号)明确规定:"要完善森林公安双重领导和内部管理体制,将森林公安纳入公安专项编制,森林公安局主要领导由同级林业部门副职或党组(党委)成员担任,森林派出所定为副科级单位."至此,江西省在解决制约森林公安发展的瓶颈问题以及落实领导高配问题上取得了重大成果.