Amir Saffari; Mariyam Jan Ahmadi; Monireh Raeati Shavazi
Volume 2, Issue 3 , January 2017, , Pages 81-97
Abstract
Nowadays, one of the main problems that the societies encounter is discharging of the ground waters and the lack of suitable substitution for that. In Bushkan Plain vast use of agricultural lands has caused a drop in groundwater level. One of the suitable solutions to reduce this crisis is artificial ...
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Nowadays, one of the main problems that the societies encounter is discharging of the ground waters and the lack of suitable substitution for that. In Bushkan Plain vast use of agricultural lands has caused a drop in groundwater level. One of the suitable solutions to reduce this crisis is artificial feeding of groundwaters. To this end, the most important step in the floodwater spreading plan is suitable zonation for water spreading and forcing the water to penetrate into underground water tables. In this study, a hybrid AHP-Fuzzy method in Geographic Information Systems (GIS) and 8 parameters of the slope, alluvium thickness, electrical conductivity, geology, land use, drainage density, conductivity and altitude are used. First, these layers were converted to Fuzzy and then were evaluated using Analytical Hierarchy Process (AHP) and Expert Choice software. The values achieved in ARC GIS 10/2 on fuzzy layer were multiplied to Fuzzified layers by using Raster calculator and were combined with Fuzzy overlay command and the final maps were then prepared. The results show that gamma value of 0/9 has the best overlapping and eventually, the optimal gamma was found on 5 classes as high improper, improper, average, proper and high proper in the plain. 7/11 percent of the study area was calculated within high improper class, and 11/1 percent of the study area belonged to the high proper class. The southwestern parts of the plain, where pasturage density is low, are the best areas for flood spreading.
Sayyad Asghari; Batool Zeinali; Saleh Asghari
Volume 3, Issue 7 , October 2016, , Pages 39-57
Abstract
Sayyad Asghari[1]* Batool Zeinali[2] Saleh Asghari[3] Abstract The location of human settlements and other facilities created by human are affected by Environmental factors, particularly geomorphology and geology. Today, as a result of population growth, development of construction is inevitable and ...
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Sayyad Asghari[1]* Batool Zeinali[2] Saleh Asghari[3] Abstract The location of human settlements and other facilities created by human are affected by Environmental factors, particularly geomorphology and geology. Today, as a result of population growth, development of construction is inevitable and the adverse impact of human needs on the ground as well as operation of areas around city and villages for creating of home and economic and industrial facilities have increasing expansion. Meanwhile, a plurality of geomorphological factors and dynamics of the natural environment makes difficult possibility of assessment all factors in order to recognize the best location for the placement elements of development. So the use of efficient methods of evaluation will be the most important measures for better planning. Accordingly, the aim of present study is using from Topsis method to locate the best places of natural and geomorphologic structure for future development of Urmia. In this study with entering of area data layers to the ARC GIS and based on topographic factors, the most important constraint of morphological Urmia, was diagnosed three sites suitable for development that proposed sites using natural and morphological components and by techniques Fuzzy ANTROPY (for index weighting) and TOPSIS (to prioritize sites) were evaluated. According to research, site C in the eastern part of the city by a factor of 0.76877 CI as the best place in Urmia is intended for future development. [1]- Assistant of Geomorphology, Urmia University, (Corresponding Autor), Email:s.asghari@urmia.ac.ir. [2]- Assistant of Climatology, University of Mohaghegh Ardabili.. [3]- Ph.D Student of Geography and Rural Planning, Kharazmi University.
