Assessment of the Rainfall Erodibility Factor uing Different Statistical Methods
- سال انتشار: 1399
- محل انتشار: فصلنامه ی سنجش از دور راداری و نوری، دوره: 3، شماره: 1
- کد COI اختصاصی: JR_JRORS-3-1_003
- زبان مقاله: انگلیسی
- تعداد مشاهده: 306
نویسندگان
Ph.D. Student, Yazd University, Yazd, Iran
Faculty Member of Yazd University, Yazd, Iran
Mohammad Ali Hakimzadeh Ardakanic
Associate Professor, Department of Natural Engineering, Yazd University, Yazd, Iran
چکیده
The aim of this research is to evaluate the rain erosion index in Iran by using the rainfall records from ۱۵۰ stations over the period of ۲۵-year (۲۰۱۰-۱۹۸۶), using geo-statistical methods. To calculate the rainfall erodibility, factor, and using Fournier index equation, the R factors for all stations were received. The rainfall erosivity factor map was depicted to show the spatial correlation between rainfall erosivity statistics, depicting of variogram become used that the linear to sill variogram with the value of ۰.۸۰ confirmed the quality correlation the various facts and was used for the interpolation. Also, to evaluate the amount of rainfall erosivity indexes four extraordinary interpolation methods (IDW) had been used: (GPI), (RBF) local, (LPI), and kriging. Moreover, to choose the satisfactory approach of interpolation, correlation of Geo-statistical techniques with the observational data has been estimated. Kriging simple method with R۲ = ۰.۷۴ has been chosen as the satisfactory technique. Based on the result of kriging simple and DEM maps of Iran, the area of ۸.۹۸-۲۷.۱۹ has the best stage (۲۲.۵) and is as much as to ۴۷۷۷ m. The lowest level is allocated to regain ۲.۱۲.۴۹, which covers approximately ۴.۲% of the entire area of Iran. The evaluation confirms the immoderate indices of erosivity for the northern strip and the west provinces of country due to the heavy monthly rainfall.کلیدواژه ها
GIS, interpolation, Kriging, R factor, Variogramاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.