application of numerical taxonomy analysis in sustainable development planning of combating desertification

due to increasing importance of desertification challenges and its consequences the necessity of sustainabledevelopment achievement in arid and semi-arid regions is essential in order to avoid limited sources asting, increase the efficiency of controlling, reclamation and restoration projects of natural areas. based on the iterature review, it has been recognized that combating desertification projects in iran were yet inconsequential and incomprehensive. it is essential to achieve sustainable and comprehensive development in combating desertification issue. in relation to the mentioned case, investigation and ranking of current status of development indices of combating desertification process in different areas, is crucial which will determine the level of, budgeting and manpower polices. therefore, numerical taxonomy model was recognized as a suitable tool for determination of ranking and classification of combating desertification indices. the study model is used for investigating and ranking of existing situation of combating desertification in the urban areas of yazd province during the period of 2002-2007. the model evaluatesdevelopment and extension of combating desertification indices in the urban areas using analytical structure and the final results are shown as the assessment maps. the results show that yazd, taft, mehriz and khatam urban areas with expansion score of 0.89 from total combating desertification indices have unsuitable situation while bafgh, sadough and tabas with expansion score of 0.44, 0.45 and 0.49, respectively had better situation. moreover, it is recognized that budgeting and future development planning of the urban areas from combating desertification on the basis of the obtained results and raking of this research.