Urban Planning
Ebrahim Asghari-Kaljahi; Ghodrat Barzegari; Robab Azarmi; Azadeh Shahbazi
Volume 22, Issue 66 , January 2019, , Pages 23-44
Abstract
Site selection for landfill is an important issue for planning and management of solid waste materials on the metropolitan cities. In order to prevention of environmental, ecological and economical impacts of waste material, investigations for selection of suitable site should be done in a scientific ...
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Site selection for landfill is an important issue for planning and management of solid waste materials on the metropolitan cities. In order to prevention of environmental, ecological and economical impacts of waste material, investigations for selection of suitable site should be done in a scientific trend. Nowadays multi-criteria decision analysis methods and GIS systems are widely using for environmental planning.Shahindezh city with 35 tones daily waste material production is facing with environmental, social and healthy problems. In this research, in roder to selection of suitable site for landfill of Shahindezh city, some important criteria including hydrogeology, hydrogeology, litology, land use, vegetables developing, soil condition, topography, transmission lines, distance from city and main roads and faults are considered. After making pair-wise comparison matrix for the criteria, the weight of information layers determined by using of Expert Choice11 software in the GIS media based on Analytic Hierarchy Process (AHP). Therefore the appropriate zones for landfill of Shahindezh city are divided into four categories according to the location potential from completely suitable to completely unsuitable. As a result 6 areas are selected and subjected to visiting and filed investigations. In term of site visit, three areas are determined as proper locations. The selected areas are compared to each other based on similarity to the ideal choice by using TOPSIS method. Finally area no. 2 located in the west of Shahindezh (in the north of the upper Sarojeh village) was introduced as the best area for landfill site of this city.
Geomorphology
Ebrahim Asgari Kalajahi; Fatemeh Namakchi; Abdolreza Vaezi Hir
Volume 20, Issue 56 , August 2016, , Pages 19-38
Abstract
Landslide is one of the natural hazards which affects mountainous areas and destroys residential areas, farms and basic facilities each year. In addition to the damages caused by landslides on roads in towns and villages, the natural environments are also affected by soil erosion. The study area with ...
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Landslide is one of the natural hazards which affects mountainous areas and destroys residential areas, farms and basic facilities each year. In addition to the damages caused by landslides on roads in towns and villages, the natural environments are also affected by soil erosion. The study area with an area of about 80,000ha is located in the west of Khoy city, northwest of Iran. Some landslides have occurred on the southern slopes which verge on the roads and frequently damage the main road, Iran-Turkey railway and several villages, such as Gougerd and upper Kalt village. Due to the proximity of the study area to the main roads and residential areas and the existence of several historical mass slides, evaluation of landslide hazard and preparing a risk map is necessary. In this research, the potential landslide zoning map was developed by evaluation of each parameter influencing landslide including lithology, slope geometry, geological structures, relative elevation, land use and coverage and ground-water. Final zoning map was produced through overlaying of the maps developed by scoring of the mentioned parameters. The study area was divided in to 5 zones from potential landslide view of point, including safe, low, medium, risk and very high risk zones. About 23 and 5.6 percent of the total area are subjected to high risk and very high risk landslide hazards, respectively.
Geomorphology
Ebrahim Asgari Kalajahi; Farideh Amini Beirami; Masood HajialilouBonab
Volume 19, Issue 54 , February 2016, , Pages 1-18
Abstract
Kandovan village with cone-shaped rocky houses is one of the tourist attractions in East Azerbaijan Province of Iran. Investigations show that the cone-shaped rocks are eroded and deteriorated by environmental factors. For investigation on this issue, in addition to the field word, the samples were taken ...
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Kandovan village with cone-shaped rocky houses is one of the tourist attractions in East Azerbaijan Province of Iran. Investigations show that the cone-shaped rocks are eroded and deteriorated by environmental factors. For investigation on this issue, in addition to the field word, the samples were taken from fresh and weathered parts of the rock mass of houses and we studied the effects of climate and weather factores on their physical and chemical properties using freezing-thawing, wetting-drying and X-ray diffraction testes. Also fractures characteristics of Kandovan rock mass was measured and analyzed by using a computer program called "Dips" and three major fractures were detected in its erosion on rocky created cone-shaped houses. There is the chance of degradation of houses due to continuing erosion along them. The results of the climate data, tests and analyzes show that rock surface were damaged and eroded by environmental factors but due to lack of appropriate water and suitable temperature for chemical weathering, there are no traces of clay minerals in the rock. Area climate condition does not show significant effect on physical and chemical weathering process of the cone-shaped rocky houses and only a thin layer of them has been damaged but there is the possibility of further damage of rocks due to continuing weathering and erosion processes and lack of conservation and restoration actions.
