GEOGRAPHIC SPACE
Year:2010 | Volume:10 | Issue:30|Papers Count:9

Showers are included among natural disasters, and understanding how they occur and their effects rates are so helpful in decreasing possible damages in various development projects. In this regard, this research is carried out to know, legislate, and predict the showers. The current research is restricted to Guilan Province and statistical period for six years (1380-1386) in ten stations. The results showed that in addition to the change of shower rate in different time-limit, the place of showers have been changed. For this reason, Guilan Province is divided into three western, central and eastern regions according to the rain intensity. The highest range of rain happened in the western region, and the least in the central region. The evaluation of shower data with various statistical distributions for determining basic equations of predicton also shows that in more cases (%84) a logarithm cubic equation can be used, because we can make correct estimation of shower rate in time unit with return period plan by using of these equations.

In renovation and revitalization of city s historical area the emphasis is on identity and indication of culture of that city. The purpose of this study is to investigate problems and to provide of strategies for conservation and creation of identity for Firouzabad by renovation and revitalization of historical area in Gur city. Gur city is the first Iranian circle city in Sassanid period which located periphery of presently Firouzabad city in the Fars Province. In this study along with realizing the importance of Gur historical area by descriptive-analysis method and SWOT technique and also using methods for effective handling and renovation and revitalization of Firouzabad historical area as indenialde identity and heritage have been studied. Results of this study show rendering Firouzabad urban development plans regardless of to Gur city. However, growth and urbanization development, provide the architectural ideas and urbanism and population increase in Firouzabad all of which causing the ignorance in renovation and revitalization of Gur city.

Recent developments in civil activities in coastal areas of Iran have destroyed important parts of geomorphologic landforms on beaches and have created considerable changes on coastal lines. Northern coast of Persian Gulf has many oil and gas reservoirs and release to free oceans. There fore, it has more intense geomorphologic changes than other areas. In this coastal part, Asaluyeh area plays an important role because of development of oil and gas installations. In this research, we have compared 1990 TM satellite images with 2000, 2002, 2004 and 2006 IRS images visually, and field observations from sedimentation and erosion in Persian Gulf coastal line. In Addition, we use High and Low Position technique and Change Detection in Erdass and ArcGIS Software for detection of changes in coastal line and landforms. On the basis of these results, the rate of sedimentation is about 50%. Sedimentation is often as sedimentary noses behind coastal buildings with progressive part in water for example jetties and wave breaks. With detail investigations, we can see that 85% of geomorphologic landforms in Asaluyeh area have changed in last ten years, because of creation of industrial installations on coastal lines. There are only some intact parts of estuaries and marshes in eastern part because of trees and environmental protected areas (neighbor with Nayband National Park). Some sedimentary landforms such as deltas and floodplains have destroyed and depositional tails and marshes have created in Asaluyeh coastal line. In this research remote sensing has been an important tool for database produced, and GIS had important role for spatial analysis.

In this paper the climatourism of Arasbaran region has been assessed by the use of climate tourism index of Mieczkowski. This index investigates climate conditions for systematic tourism. For the calculation of this index we have used parameters such as mean maximum daily temperature, mean daily temperature, minimum relative humidity, mean daily relative humidity, precipitation, total sunshine and wind speed. We pointed indexes for 5 synoptic stations for the statistical period (1986-2006). The results were entered in GIS environment (Geographic Information Systems) and the classification of climatourism conditions of Arasbaran region was carried out through GIS Maps. Findings indicated that climatourism index of the region has high variety and months of June, July, August, and September with TCI value between 90 and 100 have the best conditions in view of comfortable climate and months of December, January, February, in all stations under study have less comfortable conditions for tourism.

From climatic viewpoint, freezing is the reduction of temperature into 0 C and lower than it. The goal of this research is statistical analysis and prediction of Zahedan s precocious freezing (autumn time) and late freezing (springtime).For this purpose, we examined the minimum daily temperature for a 27-year period. In every cold period of year, the first day in which daily minimum temperature reduced to freezing point level was selected as beginning of freezing and last day was as the end of freezing. By choosing the first day of Mehr as starting month, Julius days were calculated. This data were evaluated with various distributions whereby Pearson type distribution was selected. Autumn time precocious freezing and spring time late freezing were calculated in return periods. The results showed that precocious and late freezings are retreating from both sides toward the winter season. It means that the freezing period shorter.

The selection of a method for optimum interpolation for estimation of characteristics of a given area in un-sampled points play an important role in data management. In this research, three methods of Kriging, simple, and normal, universal and basic radius functions for the estimation of mean annual precipitation of Esfahan Province were used. For so doing, initially for each model semivariogram was calculated and then drawn. Afterwards, by applying cross validation method, mean root of standard error and the determination coefficient was observed and estimated. The errors of maps were estimated and out of 16 maps one of the maps was chosen as the appropriate map. Results indicate that for interpolation of data the mean annual precipitation, normal and simple Kreeging methods, basic radius functions, and universal Kreeging display higher accuracies in the area under study respectively. Normal Kreeging method with circle model is the most appropriate method for the interpolation of data on mean annual precipitation.

Frost and sliding in Izeh-Sharekord road perform dangerous conditions for road transportation. In this study, two goals are followed: Firstly, description of the method for determining the likely occurrence of critical condition of frost and sliding using climatic condition matrix along the Izeh-Sharekord road, and secondly, the spatial and temporal analysis of frost using statistical analyses and GIS. Of the most important conclusions of the study are: There is a direct correlation between frost and height parameters as by increasing the height, frost occurs immediately and lasts late. In the viewpoint of spatial distribution, the studied northern parts (i.e. Sharekord s kms 0 to 100) are affected by drastic frost. In viewpoint of temporal distribution the Np5, Np6, NP8 conditions (accounted as dangerous frost conditions for transportation) have been concentrated in December, January and February.

Green spaces in urban areas, especially in big industrial cities entail different implications. The green space from one side improves the environment of the cities and on the other hand it creates proper conditions for the recreation times of the citizens. The importance of green urban spaces is so much that today the existence of this landuse is regarded as one of the indicators of development of the society. In this research using the existing GIS methods such as temporal analyses, network, adjacency, overlaying and also utilizing the physical indicators like the adjustability, access, gradient, area, neighborhood, and social indicators such as population density, family amassing and dimension, we have paid attention to the spatiotemporal analysis of regional parks in No. 2 area of Tabriz Municipality. The aim was to study the quality of their distribution (both in terms of physical and social characteristics) at present conditions; the degree of appropriateness of each park was to be specified. Results indicated that 36.4% of the neighborhood parks of the area under study were fully adjustable with their nearby landuses and also the study of the suitability of the neighborhood parks of this area showed that 64.6% of parks located in the No. 2 area of Tabriz have higher spatio-temporal suitability and 27.3% of parks have average appropriateness and only 9.1% of the parks have lowers suitability.