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Integration of remote sensing and GIS in monitoring the dynamics of land cover in oroba-kibos catchment area,Kenya

遥感学报 2011年第3期15卷 595-603页

作者： Were KO Owenga PO Wagate PN Orlale R Kenya Agricultural Research Institute Kenya Soil Survey

Land cover in Kenya is in a state of flux at different spatial and temporal *** compromises environmental integrity and socioeconomic stability of the population hence increasing their vulnerability to the externalities of environmental *** oroba-kibos catchment area in western Kenya is one locality where rapid land use changes have taken place over the last 30 *** shrubs,swamps,natural forests and other critical ecosystems have been converted on the altar of agriculture,human settlement,fuel wood and *** paper presents the results of a study that aimed at providing spatially-explicit information for effective remedial response through(a) Mapping the land cover;(b) Identifying the spatial distribution of land cover changes;(c) Determining the nature,rates and magnitude of the land cover changes,and;(d) Establishing the drivers of land use leading to land cover changes in oroba-kibos catchment ***-temporal Landsat TM imagery,field observation,household survey and ancillary data were ***-field classification of the Landsat TM imagery was performed in a GIS and the resultant land cover maps assessed using the field observation ***-classification comparison of the maps was then done to detect changes in land cover that had occurred between 1994 and *** was used to analyze the household survey data and attribute the detected land cover changes to their *** findings showed that 9 broad classes characterize the catchment area including the natural forests,swamps,natural water bodies,woodlands,shrublands,built-up lands,grasslands,bare lands and *** are dominant and accounted for about 65%(57122 ha) of the total land in 1994,which increased at the rate of 0.89% to 73%(64772 ha) in 2008,while natural water bodies has the least spatial coverage accounting for about 0.6%(561 ha) of the total land in 1994,which diminished at the rate of 3.57% to 0.3%(260 ha) in ***,altitude,access and rights to

关键词： land cover classification change detection remote sensing GIS oroba-kibos catchment

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