جستجوی مقالات مرتبط با کلیدواژه « lut plain » در نشریات گروه « جغرافیا »

Desert ecosystems have become one of the centers of tourism in nature due to their unique ecological potential and socio-economic capabilities and unique values and attractions. Tourism is a phenomenon that has long been considered by human societies and has continued to be dynamic according to different social and economic needs, and the growth of this industry in each country requires a proper strategy and effective management planning. Lut plain located in the provinces of Kerman (Kerman city, Shahdad city), South Khorasan and Sistan and Baluchestan, is one of the desert tourism destinations that has been considered by tourists and planners for a decade. The problem is that due to the growth of tourism activities, challenges have been raised in relation to improving the quality of life of the people and its growth trend by the tourism industry in the future of this unique region. According to the purpose of this study, which is to explain the capacity of the effects of local tourism on livelihood development in the city of Shahdad, our statistical population is the heads of households living in the city of Shahdad; Data collection method in this research includes library method and cross-sectional survey method. To extract the mentioned indicators, SPSS software, Vicker technique and HOLSAT model have been used. The results obtained from the final table of Vickor technique showed that the components Economics includes job opportunities for all classes of society with a score of 0.820 as the most important component in improving the quality of life and also the results of the HOLSAT model show that except in the environmental sector where the majority is a deterrent to improving the quality of life of local people. In other areas, it is the most important thing to improve the quality of life of residents.

Nebkhas affected by wind erosion in areas that have been and are vegetated form that is a function of wind regime, sediment load available habitat plant species and vegetation types are the Thus. This hill is the layering of sedimentary layering due to loss of moisture from the leaves of the tree or shrub and environmental conditions and characteristics of each type has its own environmental. This study tries to examine the environmental conditions in the Western lut Desert edge pay for the layering of sediments in the area are used Nebkhas layers. This research descriptive - analytical based on method field data, statistic and the library. That first field trip to the study area, nebkhas of using transects and plots were determined and then measure the morphometric characteristics of the species tamarix aphyla nebkhas. Next, a layer about 4 nebkhas, area sampling was carried out in different parts of the region and in the Laboratory, measurement of seed and plant material found in each of the samples was carried out to analyze the data collected. The results of the study indicate that the depth of about 2 meters elevation, area studies, about 5 layers can be detected that 5 layer is the result of a joint study on all nebkhas area is divided into 5 consecutive. Survey of sediment and organic matter in each layer that is present in the first period, which coincides there is a stable environment, but environment conditions in the second period, the first period was fluctuation. Peaceful environment in the region faced in the third period, but the fourth and fifth conditions in the region suggests that fluctuation. The fourth period of the oscillations was weaker than the processes in the context of the fifth round of stronger processes.

Wind erosion is a major Geomorphological force, especially in arid and semi-arid regions. It is also a major source of land degradation, evaporation, desertification, harmful airborne dust, and crop damage especially after being increased far above natural rates by human activities such as deforestation, urbanization, and agriculture. Wind erosion removes sediment, damage crops, fences, buildings, and highways. Fine sediment particles are lost along with nutrients, which can result in reduced crop yield. Eroded sediment particles are a nuisance for many people and can adversely affect the health of some individuals. There are also circumstances where eroded dust can obscure visibility. Such conditions can lead to fatal traffic accidents. Above 80 percent of Iran is currently located in arid and semi-arid to dry and sub-humid climates and they have sensitive conditions given the climatic conditions and natural characteristics of these regions and improper utilization methods, hence, they are potentially and actually subject to the phenomenon of desertification. The central and southeastern parts of Iran are always under the influence of wind hazards due to their location in arid and semi-arid regions of the world and existence of sand areas. This process each year makes damage to the rural housing in the area. The running sands have great influences on the settlements and facilities. The roads and transportation facilities are greatly affected by the hazards. The networks play an important role in making relations between neighboring villages as well as passenger and cargoes transportation. These networks are sometimes disrupted by the sand masses.
Study area: The Lut Desert is located in the south-east of the country. Between June and October, this arid subtropical area is swept by strong winds, which transport sediment and cause Aeolian erosion on a colossal scale. Consequently, the site presents some of the most spectacular examples of Aeolian yardang landform. It also contains extensive stony deserts and dune fields. The property represents an exceptional example of ongoing geological processes. The study area of this research is located in east Kerman and west part of Lut Desert. It is located in from 57:52:15 E to 57:53:15 E longitude and from 32:27:00 N to 32:28:00 N latitude at 298 meters above sea level. This area is in Takab of Kerman County near Hojatabad and Islamabad. There are vast sand areas in the vicinity of the area. The average precipitation in the Shahdad Station is 35 mm and most of the rainfall is in winter. The average temperature is 40 C and the average of Maximum temperature is 46 C in July and the average of minimum is 34 C in December.
Material and This is a descriptive analytical research in a survey. The research is carried out in two quantitative and documentary parts. In documentary section, we have used library and literature review, and in quantitative part we have also used statistical data to make required maps. In the method of this study, we initially found vulnerable villages and the areas susceptible to the sand movements. The villages have been observed in the field and then their border has also been specified on the map. How the villages are affected by ted sand have been determined to find the vulnerable parts of the rural areas. The most important parameters affecting the sand movement have been identified and entered into ArcGIS software. Fuzzifications have been made on the layers and they have been prioritized by Fuller Triangle. In the next stage, the villages have been ranked in their vulnerability using Oreste model.
The ranking of the villages have indicated that some villages are more affected by the sands and some others are less influenced. The villages in southeast part are more affected due to more severe winds, less ground water level, and less soil thickness. The villages of Deh Ghazi and Zaman Abad are in the 1st and 2nd ranks, respectively. The villages in northwest are less influenced by the sands due to more ground water level, less wind severity, and more surface water. The villages of Shojaabad, Dehnosalar, and Salarabad are, in order, less affected by the sands.
The results of the research have indicated that the villages located in the southeast part are more affected by the sands and that the cultivated areas, roads, and facilities in these areas are more threatened by the sand effects. On the other hand, the villages in northwest including Shjabadmohamadali, Deh no salar and Salarabad due to the parameters listed better than elsewhere in the region is less affected. Generally, natural factors can influence these rural areas differently.

In this essay in order to done studies and new observation will discuses to stability of wind accumulate morphs in lut plain. The activity of wind morphs in comparison together can be different due to their nature. In this essay discus that lut plain Barkhans due to their condition and nature are more active than other morphs. So, they have more unstable ability. This essay is based on comparative method in nature of morphs, and has prepared with using of 1/100000 land set images, 1/50000 topography maps,1/100000 geology map, wind-gauge data of region stations and 1/5500 air photo. Its analysis is based on some observations in Google Earth and local observations. In this essay are emphasized 4 types of morphs including: Barkhans, length duns, wide dunes and Ghourd which are abundant in lut plain, and in images scale and used pixels.   The vast part of  west section in east mountain of lut plain (the east part of central lut plain) and south and south-west of this plain is covered differently by wind sand, this morphs have different high. The high of Ghourds (from floor)  are about 475m. Sand duns almost have very slope head-line over the less slope, and it is indication for changing role of present winds. Between the some sand duns, specially in Ghourds, the seasonal water-remains are increasing. This increas show that sand duns in its floor also are affected by seasonal sub-surface flows. Where the Barkhans have been accumulated, erosion surface not seen on the Barkhans how had been cut it and the affect of seasonal water-remains there isn’t in the base-level, and even in some parts, Barkhans formed on the aged erosion valleys, that is, they prepared the wind cycle surface (aged erosion-new accumulation).So, presents the newer activity, and based on and by attention to criterions which presents in the essay text, in comparison with Ghourds, length and width, duns Barkhans are more unstable.