چکیده:
Due to increasing importance of desertification challenges and its consequences the necessity of sustainable
development achievement in arid and semi-arid regions is essential in order to avoid limited sources wasting, increase
the efficiency of controlling, reclamation and restoration projects of natural areas. Based on the literature 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 evaluates
development 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.
خلاصه ماشینی:
Student, Faculty of Natural Resources, University of Tehran, Karaj, Iran Received: 1 August 2009; Received in revised form: 12 August 2010; Accepted: 12 November 2010 Abstract Due to increasing importance of desertification challenges and its consequences the necessity of sustainable development achievement in arid and semi-arid regions is essential in order to avoid limited sources wasting, increase the efficiency of controlling, reclamation and restoration projects of natural areas.
1. Determination of the evaluation options (urban areas) and indices (de de-desertification indices) In the first step in order to assess combating desertification performance, 10 urban areas of Yazd province (Abarrkooh, Ardakan, Bafgh, Taft, Khatam, Sadough, Tabas, Mehriz, Meybod and Yazd) have been selected and investigated Where Cio n i1 Zij - PIj2 (4) from de desertification indices such as: the area of planted lands, the area of irrigated lands, the area of restricted lands, wells and pools, and theCio =the pattern of the options development Z ij = normalized of the number related to each row and column in matrix.
7. Calculation of upper limit of the options development (CO) from equation 5 In this stage, data indicate desertification activities were presented in data matrix format according to research literature (Jihad- Agriculture Organization of Yazd province, 2006) (Table1).
(Lillesand and Kiefer, 2000) On the basis of taxonomy model and in order to access the development of combating desertification project in Yazd province, important results have been obtained.