جستجوی مقالات مرتبط با کلیدواژه « arcgis » در نشریات گروه « عمران »

The main need of sufferes in natural disasters, is to provide housing, especially to determine the place of temporary residence in critical situations. After the incident, it is not possible to provide suitable places for the injured immediately. Before such crises occur, proper planning must be done to determine the temporary residence so that the necessary infrastructure can be provided and in case of an accident in a crisis situation, it is possible to quickly set up camps for the injured. In this study, to determine the optimal location of temporary residence in Tabriz, various standards effect have been considered such as medical centers, fire brigade, faults, fuel stations, infrastructure facilities, worn-out tissue, watercourse complications. The desired standards were completed at first by experts and once again by experts in this field based on form of a questionnaire, then using the fuzzy hierarchical analysis method, the final weights of each standard were determined. Experts attributed the closeness to the worn-out texture and the second group of experts to the standard of avoiding faults the highest weight. That was important the avoiding standards to hazardous site and the river, for the both experts group. Finally, the last weights obtained the opinions of experts groups from fuzzy hierarchical analysis have been entered in Arc GIS software and the relevant maps that have been prepared using weight overlap in this research. The results show that before the incident, the western part of the city has suitable for temporary accommodation, and after the incident, the central part of the city is appropriate for settlement site. In addition, by comparing the vulnerability maps of Tabriz, the necessary locations for the construction of a temporary housing site were prioritized.

One of the important issues after an earthquake occurrence is to transfer residents to temporary accommodations. These points are areas of the city that have a higher safety factor against earthquake reoccurrence and have good access to management and relief centers. Due to the critical condition in the area after the earthquake, with the transfer of the township to these areas, relief procedure can be achieved with the highest speed and minimum risk. The purpose of this study is to determine the suitable locations for the construction of temporary accommodation facilities for injured people after earthquake occurrence in Karaj. To this end, firstly, the main controlling parameters in selection of the appropriate places for temporary accommodation are determined, and are classified into two groups of the main criteria of compatibility and incompatibility. The total number of the sub-criteria are twelve. Due to the spatial nature of this problem, fuzzy logic system with multi-criteria decision-making method is used to determine the most suitable points. After fuzzification of the criteria, their participation weight is determined and then, they are prioritized using fuzzy hierarchical analysis method. In the next step, desirability map of the region is prepared for each of the criteria. Eventually, by combining the impact of the studied criteria, a descriptive map of the region relative to the points of interest for temporary accommodation is generated. Based on this map, seven points are selected as suitable points for the construction of a temporary accommodation camp, and by employing the analytical hierarchy procedure with Expert Choice software, the optimal point is chosen.

Natural disasters have always existed as natural phenomena during the life of the planet. The occurrence of natural disasters such as earthquakes, floods, storms, etc. has often left destructive impacts on human settlements and has caused heavy casualties on its inhabitants and has imposed heavy economic and social burdens on human societies and countries of the world. . In view of the increasing population, especially in the Third World and developing countries, on the other hand, population density and settlement in old-fashioned and old-fashioned urban contexts and the emergence of problems caused by these issues, cities and cities in particular Babylon has been exposed to adverse effects and management abnormalities. Because the vacant areas have quickly become residential uses, the magnitude of the earthquake hazards has increased as a result. Therefore, the need to reduce the city's vulnerability to earthquakes has become one of the main goals of physical planning and urban planning. In this research, data and information were collected in both documents and field and analyzed in the ArcGIS software environment and after analyzing the risk and vulnerability of the region, it was examined whether the city of Babylon after the emergence of a The earthquake can have the least financial and fatal losses, and there are facilities and facilities available in the city that respond to the conditions of the crisis. Finally, some areas of Babylon were identified as having a high risk of earthquake, and solutions were presented for crisis management in these areas.

Aim of this study is to estimate the optimized volume of reservoir in un-gaged basins and extract the estimation pattern of reservoir capacity for other regions. For this purpose, Ziarat was divided to 9 sub-basins using ArcGIS and the physiographical parameters was determined for each of them. for modelling of volume variation, demand before and after rain and also product before and after spill, were considered as different of Possible scenarios. Time history for amount of volume, was obtained as an equation according to other variables. The optimized volume calculated by mentioned equation as objective function and constrains.i.e. cost, demand and spill for each sub-basin. These volumes vary from 700 to 5000Mm3 and significant relation between volume and curve number index was observed. To extract a relation for prediction of reservoir optimized volume in un-gaged regions, regional parameters and optimized volume was considered and 6 equations was prepared by dimensional analysis and different functions. in this equations, 12 rainfall of 24-h probable maximum event were used for 4 consecutive years (2012-2015). Finally, using R-square and standard deviation error, the more optimized equation was presented.

Nowadays analysis of spatial statistics, as a new and efficient tool, has been considered by researchers in various field. Attention to the dependency of variables and their relationship in study area, direct using of space, environment, neighborhood and spatial relationship are the main parameters, which has made the spatial statistics superior to the classical statistics. In this study in addition to introducing the spatial statistics tools in ArcGIS such as Global Moran’s I, Local Moran’s I, General G, G*, Ripley's K-function, Mean Center, Directional Distribution and Geographically Weighted Regression, their application have been investigated in three branch of environmental science: climate changes, environmental pollutants and species distribution. Meanwhile this study was aimed to attract the attention of environmental scientists and other related researcher about the spatial statistics tools.

Design of technical buildings and urban infrastructures, like transportation systems, requires preliminary estimates of geotechnical parameters. Thus, it is very important to prepare detailed engineering properties of soil deposits in different areas based on geotechnical investigations. This study aims to evaluate soil properties followed by a geotechnical database for Semnan City, Iran. For this purpose, wide information was collected from 110 geotechnical boreholes. In addition to the statistical analysis of the collected tests results, physical and mechanical soil parameters of Semnan City were zoned using kriging statistical interpolation method by ArcGIS software. Preparation of such basic information, while having the ability to be completed and updated, can provide the conditions for better estimation of geotechnical parameters in the studied region. The internal friction angle, cohesion, density and soil moisture content parameters were zoned using statistical interpolation method. Finally, based on the carried out zonation, ground conditions in different areas of the studied region were described