5253

4923

كارشناسي ارشد

بيابان زدايي

اصفهان: دانشگاه صنعتي اصفهان، دانشكده منابع طبيعي

1388

سيزده،156ص.:مصور،جدول،نمودار

ص.ع.به فارسي و انگليسي

حميدرضا كريم زاده

رضا جعفري،حسن خسروجردي

18/3/89

جمال الدين خواجه الدين،سعيد سلطاني

1396/10/02

كتابنامه

مهندسي منابع طبيعي

ID4923

به فارسي و انگليسي: قابل رويت در نسخه ديجيتالي

Isfahan University of Technology Department of Natural Resources Evaluation Present status of desertification in southern Khorsan with medalus method case study Tabas Masina region of Darmian city Hasan parvaneh hasanparvaneh@yahoo com MAR 13 Degre M Sc Supervisor H R Karimzadeh hr karimzadeh@yahoo com Abstract Recently desertification as a great problem threaten many countries all over the world For evaluation and mapping of desertification many researches have been conducted in other countries leading to regional and local models The present study attempts to assess quantitatively the desertification process to develope a regional model in Tabas masina region southe khorasan with area of about 25000 ha as a case study In this study based on the MEDALUS method and according to the characteristics of study area a regional model was developed using GIS In the first step all major factors affecting desertification were determined These main eight indicators layers included soil climate erosion plant cover groundwater phisigraphy Geology and management for human activities Then a number of sub layers for each main layer affecting the quality of main layers were identified To each sub layer a number between 1 to 2 according to the MEDALUS method was denoted These denoted numbers were considered as a weight for each sub layer GIS ArcGIS then was used to analyze data to prepare the main layer status maps using geometric mean for the sub layers and the main layers Ultimately the maps were combined and based on the geometric mean of the main layers a desertification potential status map and sensitive map of the area was developed The results indicated that 5 3 of total study area classified as a very severe class 93 3 is classified as a severe class and 1 4 of area classified as a moderate class of desertification The results showed that management and groundwater quality are the most important parameters that affecting desertification process in the tabas masina region Keywords Medalus model Desertification Southern Khorasan Tabas Mesina Vicinity

حميدرضا كريم زاده

رضا جعفري،حسن خسروجردي

جمال الدين خواجه الدين،سعيد سلطاني