The receding glaciers, shrinking cover of natural forests, the rapid loss of biodiversity, the falling ground water levels, rising temperature, falling agricultural productivity, point to the destructing health of the ecosystems, not well known in the past. The Nilgiri Biosphere Reserve is not out of bounds for the same and experienced high rates of deforestation over period of time. It is being envisaged judicious and realistic land cover and land use change data in conservation planning, accurate and efficient techniques to detect forest change from multi-temporal satellite imagery are desired for conservation optimally. The Attapady block, in Wynad district of Kerala State was a treasure house of dense forest and biodiversity and over a period of time, with intense pressure of human land use pattern, wide scale degradation occurred. It is imperative to conserve and reclaim lands for judicious and optimum use of land and water potential, and through alternatives for land use, economic, social conditions, and changes of ecosystems. In view of this scenario, a study was taken up in Attapady block, primarily to study changes in vegetation type, density and extent, analyze the extent of deforestation and to understand the temporal changes. NDVI was used to identify the changes in density of vegetation and the change matrix identified the variations in the land cover over period of time. DGPS marked critical locations. Periodic monitoring to arrest deforestation will be a necessity. Regulatory framework on water use for irrigation, land use, forest resource use, incentives on conservation, regeneration and protection measures will remarkably improve the development scenario, for which the monitoring of environmental change using Geoinformatics technology is imperative.