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Reclamation areas and their development studied by vegetation indices

International Journal of Digital Earth 2008年第1期1卷 155-164,I0011页

作者： L.Halounova Remote Sensing Laboratory Faculty of Civil Engineering Czech Technical University in PragueTha´kurova 716629 Prague 6Czech Republic

Large areas in the Czech Republic were used for open casts of brown coal *** of them have been already *** of them and of their dumps is the next step intheir *** is possible to divide used reclamations into the forest,hydrologic,agricultural and other onesroads,*** age varies from 45 years to as yet *** areas are documented in reclamation *** about age and land use determined groups of these areas to be evaluated by vegetation indices.100 areas with forest type were *** vegetation indices(NDVI,DVI,RVI,PVI,SAVI,MSAVI,TSAVI and EVI)were calculated and their average value in each area in 1988,1992 and 1998 Thematic Mapper data were *** over years showed close relation to precipitations of previous *** relation was confirmed by evaluation of forest areas situated near reclamation ***/negative changes of vegetation indices were different for different groups and different vegetation *** overview of results of vegetation indices is presented for individual areas whose land use comprised at least partly forest *** in a 4-year period(19881992)were in many areas by many indices negative,changes in 10 years were in most areas by most vegetation indices ***,minimum values and maximum values in groups were *** of vegetation indices brought again various *** vegetation index is not sufficient to prove improvement/deterioration of vegetation *** state before measurement should be *** shortage of precipitation can cause vegetation cover deterioration,which is also only *** best development derived from vegetation indices evaluation was found at forest reclamation with mixed tree stand that was 1020 years *** method was derived as a tool for post-finishing control of vegetation development of reclamations performed in several year periods.

关键词： reclaimed area Thematic Mapper vegetation indices time change

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