systematic application of degradation model for environmental impact assessment of lation watershed

it is fair to say that the man by including agricultural, industrial activities and exploitation-of natural resources in his survival agenda is the most responsible of all for environmental changes. fundamentall development in various parts of a watershed is unavoidable and sometimes necessary. in recent years, large number of environmentally improper developments including new town development have taken !place around latian lake (dam), which have led towards construction with out proper engineering and environmental observations. the aim of this research work is assessment and measurement of degradation due to inappropriate development in environment. degradation : mode] is one of the important tools in quantification of environmental degradation. this model is a systemic analysis type and uses mathematical model that yields development effects of a region in the shortest possible time. in another word, it reduces time and cost for evaluation process. in this work, borders of watershed have been drawn to scale of 1:50,000. the region has been divided to 748 units (i.e, 2cm x 2cm grid) which each grid covers :an area of 1km2. the degradation model for each individual unit has been applied by employing computer programs. it was found that 510 units (68% of total) are unfit for development, because of certain .inappropriate conditions. also 149 units (i.e. 20% 0 total) were ideteriorated by human activities that have lost potential for proper development