GEOGRAPHICAL RESEARCH QUARTERLY
Year:2006 | Volume:38 | Issue:55|Papers Count:13

Southeastern district of Iran is arid and semiarid. Inconsiderable, rainfalls in this area are classifiable under influence three distinct synoptic systems. The first systems are those cyclones which along with western winds of moderate areas penetrate into district farm west, and cause 57.5 percent of the precipitation. These rainfalls are tiny but continuous and occur in winter season. The second systems are made by short waves of western winds as their trough grows deeper. They bring humidity into the region through southern seas such as Persian Gulf, Oman Sea and Red Sea. They cause 33.68 percent of the region rainfalls. The third systems are those low pressure systems that called Indian Monsoon and through wide circle, bring the Indian Ocean moisture into the region and cause .82 percent of its rainfall. The second and cause little 8 precipitations although most of the time they transfer the humidity of ocean and seas into the region .Analysis of climatology are suggested in order to fertilize these kind systems.

Natural rivers are always transforming under the impression of various factors and criteria from the viewpoint of size- form and pattern. Meanwhile runoff caused by drainage basin, load and kind of sediments which river carry it to channel, is one of the main variables, which play a fundamental role in determining size and form features of channel.We are trying to go through the role of debit of the rivers and sediments in alterations of channel and geometry characteristics of the Talar and Babol rivers.After examination geometry features of channel in mentioned rivers, we have tried to analyze relations between variables of the river debit and sediments comparatively and then we are going to illustrate available relation between them.For achieving this goal, first, considering existing stations, the amount of debit and sediments along every rivers from the top (upstream) to the end (downstream) have been achieved. Then, geometry features including width, depth, width/depth, sinuosity, central angle, length wave of studied rivers have been calculated. Finally, by analyzing these variables, we will get a model which can be used not only establishing relation between variables together but also for estimating periodical alteration of dimensions form and pattern of rivers.

Rural sustainable development is special steps to sustainable development. Such goals may be specified at a variety of scales and many objectives may be set for various aspects of rural settlements. In the geographical studies recognize space factor and the human and environmental interaction is very important. It is basic steps of geographical research and determines environmental capabilities. Geographical Information System (GIS) can help to recognize space, environmental analysis, modeling and mapping of digital spatial information. This paper argued about methods use of (GIS) for environmental analysis, determination of capability geographical space, as basic needs of rural and regional planning. This study had analyzed of existing rural settlement patterns in the Torbat-e-Haydarieah as a rural region and the aim is to arrive to suitable rural settlement distribution and hierarchical rural settlement. In this paper layers of space information and non-space information that used for determine space capability and index, standards, and variables used to determine the best location for rural centers had argued.

Zagros is one of the most active seismic areas of Iran. The main subject to zonation of earthquake hazard in this hazardous area is analysis of feedback of geological units against earthquake energy. The object of this study that takes place in Shiraz area was analysis of behavior of geological formation against faulting and earthquake occurrence. For this propose was used geological formation layer, historical and 20th century earthquake data, and using GIS relation between formations with top considered variables studied. Result of this study indicates that Asmary calcium formation has maximum of faulting density and unclassified Asmary stones has maximum of faulting length. Frequency of seismic events in quaternary sediments was being more than Asmary formation and Jahrom Asmary stones. After analysis of formation behavior instead of seismic power weighted each of them and earthquake hazard zonation map provided in five classes based on formation resistance.

The study area is located at the 38° 42´ to 38° 52´ northern latitude and 23° 45´ to 40° 45´ eastern longitude with an area of 283 km2 in the north-east of Tabriz In the genesis and evolution of various and typical alluvial fans on the study area, many factors such as, basion areas, climate, lithology, green cover and systematically effective.The tectonic crashed zone(about %90 mountation area) due to high sensitivity of lithology,  climate, every year caused very sediment delivered to alluvial fans (e.g 9933.9 ton in per year only to Darh diz alluvial fan) and so more typical alluvial fans are formed. The role of paloclimatic vareation and doment of periglacial erosion system in the past and yet have very important role on the ratio of erosion, translation and, nature of deposition.Vareation of gradient and specially more than %5 in the length of many alluvial fans profile, indicate different deposition period due to climate condition and specially tectonic activity.The results of the field study, morphomatric and estimate coefficients and index, as well as statistical relations among some variations, indicate that the research hyphottieses on the role of effective factors in the genesis and evolution of alluvial fans are correct. E.g, the high correlation %97 with confident %99 between basion areas with alluvial fans areas, and ratio of sediment delivered to alluvial fans area correlation %936 showed very high significant relation among them. The exist of high amount fan coducty index for number 1, 2, 3, 10. Indicate confined with some natural obstacle (structural) and in the number 4, 5 unlike.The role of roughness coefficient of subbasion, not only are of very importance in the development and evolution of alluvial fans ,but also are far more effective in some of them (such as Galla riz),that their basion areas.

This article initially introduces the economical geography of the studied region (south zarrine rood county) and describes briefly its different economical aspects(agriculture, mine and industries, services) then studies the impacts of hydromorphodynamics (from the view point of Morphogenes, pedogenes, sediment and the river basin alleviation) on the  development of rural economy. For that end, we did granolometric studies on the Simine and Zarine rood river alluvial areas the did analyses based on the results of granlometrics. And studied its impact on the varietization of rural economy of the region .Eventually, concerning with introductive relations between that hydromorphodynamics and different parts of rural economy in the region, some recommendations and approaches have been suggested.

Based on daily data of synoptic maps on the earth surface and level of 500 hp, precipitation floods on the southern part of the Caspian Sea along Iran during the past 30 years (from 1970 to 1999) was analyzed.Results show that three kinds of air mass and pressure system affect precipitation in the south shores of Caspian Sea: Siberia high pressure, low- pressure systems and emigrant anticyclones. Between those factors, most and strangest precipitation originates from emigrant anticyclones.Necessary condition for tacking place of density precipitation in area while provide when in the south shores of Caspian Sea in the surface of the earth settle a high pressure ridge that resulted from cold air expansion and exit a trough in the middle and upper level of atmosphere. So, higher of pressure in the surface of the earth and deeper of the trough in the upper level lead to more expectation of more intensity precipitation.Results show that of density precipitation in north Iran on the level of 500 hp while provide when expansion and exit a ridge on the black sea, east to center of Europe, east Mediterranean Sea and the exit of deep trough on the east of black sea. This trough expansion from 70˚ N latitude to south-southwest in longitude between 40˚ to 50˚ N.

If we consider the urban sustainable development as the economic efficiency, social equity and environment protection, one of the important factors in realizing the optimization of utilization of the city land. Today, this factor is not paid much attention in our cities such as Yazd.Yazd, once, was famous for the contrition in the texture and structure, today has a scattered and non-concentrated several hectares of the lands and ruined texture have been left useless and milliards of the public capitals service-rendering are spared. In this article we'll try to show a half of the present area of Yazd is fals and it needs no area increase in the next 25 years.

Here, it has been tried to analyze to present security discourses and the process of development in Iranian political system.The first part whose theoretical bases have been taken from Islam political thought and Iranian constitutioc is called revolutional discourse. This discourse lasted till the end of Iran & Iraq war.End of the war led to a new period in the national security of Iran.The national security decreased and the national interests base increased respectively in this Period this period named as national discourse of security of Iran, lasted up to the end of Khatamis” Government.

Women often contribute a major proportion of the family farm labor, usually to the production of food crops and to specific tasks such as weeding and cultivation. Agricultural extension programs have frequently overlooked the importance of women, both as major contributors to the farm labor supply and as significant family breadwinners. This article explores changes and nature of women's work in Gilan – in homogenous area on the north of Iran. It was determined that Geographical, Cultural and Economic structures shaped that nature of women's work.In this category the most important factors effect on women's work during the recent years were modernization, family income landownership and women's education.  Some major indicators were examined to test the effects on women's work in the area under studied.Conclusion indicates that a difference in the structure of the families' income has a greater impact on the situation than agricultural industrialization. Moreover, women in the poor families were more engaged in labor force. This change may divert female labor from food production with subsequent effects on the welfare of the family.  

In this essay, which is based on the arguments in the master of Art's thesis, it is tried to clarify the changes of population, from the beginning and then estimates the population of 10-25 years old.An the continuation, we concern with the analysis of conditions of different economic section in Sanandaj based on reliable estimation, agricultural section with its subcategories, the mines with its subsections has been discussed, then the role of Sanandaj in 1335-45-55-65-75 decades in the triangle diagram has been explained.The distinction of place coefficient in seven major parts of jobs and in the continuation, the place coefficient of subsections of the services collection has been discussed, then by using the Shift-Shar model, the essay analysis the economic condition of the city and its changes in relation with the condition of the city in different areas, and in relation with the central areas of the country and finally predicts the there scenarios.For seven major parts of jobs during 1375 in order to get general view about the economic of Sanandaj city as a center of War-centered border Province.

This study is an attempt to investigate human and physical factors effecting zoning of Markazi District in Varzaghan Country. To do so, this study employed the precise technique of GIS to produce and analyze maps. In this process initially settlements were examined from four points of view including topography, slop, capability of land, and availability of water resources, then, related maps were created. After that, By utilizing weight center index model, rural settlement were ranked regarding human factors, population, availability of roads, health service, education service and infrastructural facility. After this stage, applying neighborhood interpolation analysis IDW (inverse distance weighted) model the all district were divided into different zones. Then, standardization blending of layers and were conducted using overlaying and map blending such as Boolean logic and weighting with ranking system. Finally, with overlaying the created maps with physical and human resources utilizing the said models the appropriate districts for the establishment of rural service centers were located.