Geomorphology
Musa Abedini; Bahareh Ghasemyan
Volume 19, Issue 52 , June 2015, , Pages 205-227
Abstract
Landslides and mountainside instabilities are major dangers for human activities which often cause the waste of economic resources and damage to properties and installations. These dangers occur in natural slopes or in slopes changed by man. This study mainly aims at identifying the factors influencing ...
Read More
Landslides and mountainside instabilities are major dangers for human activities which often cause the waste of economic resources and damage to properties and installations. These dangers occur in natural slopes or in slopes changed by man. This study mainly aims at identifying the factors influencing landslides happening in the city of Bijar, Kordestan Province, and at evaluating the regions having the potentiality of landslide for preparing localization map using the analytical hierarchy process (AHP) Model. In the present study, first employing field visits, questionnaires, geological and topographic maps, and reviewing the studies carried out, nine factors including the variables of: height from the sea level, degree of slope, direction of slope, geology, the distance from the linear elements (fault, road, river), rainfall, and land use were employed. Then affecting factors were binary compared using analytical method by indicating the weight of each factor as indicator for their effects in occurrence of landslide. Accordingly, the landslide zonation hazard map was prepared to the use of weighed information layer and weighted coefficient of each factor. Results of this study show That slope factor of the relative weight of 0.307, and Landuse factor with the relative weight of 0.218 The most effective respectively And the relative weight of rainfall factor 0.019 the lowest impact on Landslides have on the city of Bijar. Thus, 75.489 % of the area of the region have faced very low-risk, 10.037% with low risk, 3.628% with average risk, 4.062% with high risk, and 6.784% with very high risk.
Mosa Abedini; Hasan Setayeshi Nesaz
Volume 18, Issue 49 , November 2014, , Pages 139-165
Abstract
Zoning of Landslide hazards is one of the ways that used to determine critical areas. Landslide zoning maps can also be utilized in environmental planning to reduce damage. In the present article, the AHP has been applied to the Gollojeh basin located in Zanjan province. The most important factors in ...
Read More
Zoning of Landslide hazards is one of the ways that used to determine critical areas. Landslide zoning maps can also be utilized in environmental planning to reduce damage. In the present article, the AHP has been applied to the Gollojeh basin located in Zanjan province. The most important factors in landslide occurrence in this study basin were identified as: geology formation, slope%, land use, height and distance from river, slope aspect, rainfall and faults. After layering and assigning weights to them the final map was produced in Arc GIS .The final results from this study show that the weight of the nine criteria respectively: are 0.4092, 0.2485, 0.1439, 0.0786, 0.0479, 0.0309, 0.023, 0.0181 with geology and faults having the greatest and last weights. Finally the landslide map denoting in four domains at very high risk, high risk, medium risk and low risk was prepaerd.
Jamal Mohammadi; Hossein Poorghayoomy
Volume 18, Issue 48 , June 2014, , Pages 279-298
Abstract
In the past decade we encountered the population growth of our country, resulted in demand growth. Perhaps there are not much service centers in this city, but the efficient distribution of these centers is important. One of the service centers which has a significant role on city and is safety insurance ...
Read More
In the past decade we encountered the population growth of our country, resulted in demand growth. Perhaps there are not much service centers in this city, but the efficient distribution of these centers is important. One of the service centers which has a significant role on city and is safety insurance for human life, is firehouse center. Fast and on time access of firehouse vehicles to the accident location is very important, because on time access of vehicles to accident location results to lesser damage. On the other hand, this on time access to accident location is related to efficient distribution of firehouse centers. In order to evaluate the current situation of firehouse centers regarding fire accidents, the Noorabad city was chosen as the study issue, and by using GIS function, network analysis and multiage analyses of Thiessen, the current situation of Noorabad firehouse centers were studied. After recognizing the improper distribution of these centers using AHP model and index overlaps, the proper location of firehouse centers of Noorabad city was identified using GIS software. The current research method is descriptive-analytic. The required information of this research were collected from field observation, comprehensive design study and descriptive data of Noorabad city, 1.5000 maps of current situation and also field observation
Rasol Ghorbani; Nader Parvin; Jamal Gherisarian
Volume 17, Issue 45 , November 2013, , Pages 163-181
Abstract
In the modern urban planning using GIS for land use analysis is usual and efficient. Distribution of shopping centers as one of urban land uses plays important role in urban planning and its rearrangement. It seems that using the AHP extensions for site-selection of new shopping centers can aid improve ...
Read More
In the modern urban planning using GIS for land use analysis is usual and efficient. Distribution of shopping centers as one of urban land uses plays important role in urban planning and its rearrangement. It seems that using the AHP extensions for site-selection of new shopping centers can aid improve urban structures and increase urban efficiency.
The main goal of this research is to survey and analyze suitable locations for constructing new shopping centers in Saghez. The city has located in Northwest of Kordestan province and its population is 131329 based on the report of Iranian Census Center in 1385. Majority of the residents do not have proper access to high quality shopping centers and therefore the current research aims to use AHP topropse new shopping centers locations in Saghez.
The results of this research show that the distribution of shops and commercial centers in this city have not adapted with urban planning standards and construction of new shopping centers in districts 3 of Saghez city would provide optimal distribution of commercial centers, and improve accessibility and proper services for residences in city.
