The development of nature-based tourism is dependent on the introduction and attention to the attraction of natural tourism attractions. In fact, identifying the factors affecting the increase in the attractiveness of ecotourism and geotourias places is among the most important issues in the development of tourism and naturalization of an area. According to this, the purpose of the present paper is also to investigate the factors affecting the attractiveness of tourist and geotorrhean locations in the study area. The present research is applied in terms of purpose and in terms of its method, descriptive-analytic. The data collection tool and information questionnaire and interview are. The statistical population of the research is experts and specialists in Tourism in Khorramabad in Lorestan province. In this research, 50 experts and natural tourism specialists were selected as samples. The research results indicate that four factors of ecotourist and geotourist tourism products, natural assets, and development of tourism infrastructure and create opportunities of nature-centered tourism boom are the most important factors in increasing the attractiveness of tourist places and geotorrhea. Also, the results showed that the strengthening of regional tourism infrastructure, private sector investment in tourism and the recognition of natural tourism capacities and tourism attractions, and planning for its development, are the most important strategies for development of natural tourism in Khorramabad.

In this study, the changes in the Khorramabad storm in the period of 1952 to 2015 have been investigated. For this purpose, data from meteorological codes 06 and 07 were received from the Meteorological Organization of the country, and after identifying the days of winding with dust storms and calculating their monthly frequency, monthly, seasonal and annual time series were analyzed. In this study, descriptive statistics, cluster analysis, linear and polynomial trend analysis, and nonparametric Mann-Kendal test were used to study the frequency variation of dust storms in Khorramabad station. The results of the research showed that the monthly frequency of dust storms in Khorramabad station in the middle of May, July and June is May and July, respectively, and from May to July (May to July), the frequency of storms in the dust and dust Khoramabad station is added that this issue is not related to the district heating and dry season. In the seasonal season other than the autumn, which is not frequent with frequent dust storms, in the rest of the seasons, especially in spring and summer, the seasonal concentration of dust storms in Khoramabad has been intensified. The analysis of the trend of time variation in the occurrence of dust storms in Khorramabad station showed that in most of the months of the year and in the three seasons of spring, summer and autumn, as well as in the annual period, there was a significant change in the frequency of dust storms in Khorramabad station. It is increasing with a relatively steep slope, indicating that in the future, the frequency of dust storms in Khorramabad station will be increased.