Abstract
Various processes, that are collectively referred to as desertification, have in varying degrees resulted in the degradation of many productive areas in Pakistan. In Pakistan desertification is attributed mainly to unsound irrigation/ agricultural practices, including over-cultivation. The adverse effects of these desertification processes on the ecosystem are evident mainly in the form of salinisation of soil and ground water, waterlogging, soil erosion and sand dune migration. Repetitive high resolution satellite images, in conjunction with historical/existing ground-based data and maps, have been used to examine the nature, trend and quantum of the desertification processes in different environmental regimes. Delineation and mapping of affected areas has been performed to establish a reliable base-line for monitoring desertification processes and evolving suitable strategies for combating them.
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