zohre ebrahimi; abasali vali; mohammad khosroshahi; reza ghazavi
Volume 24, Issue 1 , May 2017, , Pages 152-164
Abstract
Wetlands in the central Iran lakes are considered as part of desert ecosystems and their destruction leads to adverse consequences. In central part of Iran, climatic and human factors have created significant differences between dry and wet surfaces of Gavkhooni wetland in recent decades, leading to ...
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Wetlands in the central Iran lakes are considered as part of desert ecosystems and their destruction leads to adverse consequences. In central part of Iran, climatic and human factors have created significant differences between dry and wet surfaces of Gavkhooni wetland in recent decades, leading to produce more dust in central part of Iran. The aim of this research was to assess the impact of dried bed of Gavkhooni wetland on the production of the internal dust in Isfahan province by using remote sensing and storm roses in the period of 22 years (1991- 1992 to 2011-2012). For this propose, the landsat imagery and anemometer data were used. After geometric and radiometric corrections, Normalized Difference Water Index (NDWI) was calculated and the dry and wet surfaces were separated. To determine wind erosion threshold velocity, undisturbed soil samples were transferred to the wind erosion meter. Then, the number of dusty days in the synoptic station of Isfahan was calculated based on the wind speed greater than wind threshold speed. Relationship between the number of dusty days and dried bed of wetland was evaluated with correlation analysis. Finally, to determine the dusty wind direction from the side of Gavkhuni wetland to Isfahan station, annual and seasonal wind roses and storm roses were plotted and evaluated. The results of this study based on the artificial neural network model showed that the most important factors influencing the bed of the Gavkhuni wetland were input flow rate, evaporation, drop in groundwater level, temperature, and rainfall, respectively. The results of the correlation analysis showed that there was a significant inverse relationship between the number of dusty days and dried bed of wetland in the seasons of autumn, spring, summer and annual scale in Isfahan station. Also, results of storm roses showed that dusty winds did not blow from wetland toward this station.
Zahra KHdematolrasoul; Reza Ghazavi; Seyed Hojat Mousavi
Volume 23, Issue 1 , June 2016, , Pages 70-79
Abstract
Tourism development in places that have the potential to attract tourists could be employed as an effective tool for comprehensive growth and development of communities.Fars province is considered as one of the important tourism centers in Iran in terms ofhaving numerous natural, historical, and ...
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Tourism development in places that have the potential to attract tourists could be employed as an effective tool for comprehensive growth and development of communities.Fars province is considered as one of the important tourism centers in Iran in terms ofhaving numerous natural, historical, and cultural potentials, among which desert regions could be mentioned. This research was aimed to evaluate the desert tourism attractions of Shiraz Desert and determine the strategies for sustainable tourism development using SWOT. In this regard, initially, the capabilities and limitations of the study area were identified and after consultation with experts, questionnaires were developed and given to the tourists in the region and natural resources experts. Then, the results of questionnaires were analyzed using SWOT and statistical tests in SPSS software. According to the obtained results, growth and development strategy is recommended for development of desert ecotourism.