عنوان مقاله English
نویسندگان English
Kermanshah Province, and particularly Ravansar County, is one of the most important agricultural and horticultural regions of Iran, and hail frequently causes substantial damage to these sectors. Installing anti-hail systems is one way to reduce such damage. To this end, the 37 hail days recorded at the station were subjected to cluster analysis, yielding three main hail patterns. For the representative day of each cluster, maps of 500 hPa geopotential height and 700 hPa moisture flux, together with time–height (1000–500 hPa) diagrams of temperature and omega, were plotted and analyzed. The synoptic analysis shows that hail in the region requires a low-pressure system or trough over the Middle East that advects warm, moist air from southern latitudes, together with strong instability, weak static stability, and sufficient low-level moisture to sustain convective showers. Site selection was performed in a GIS environment using the Analytic Hierarchy Process (AHP), based on criteria such as slope, aspect, temperature, and humidity. Each criterion was mapped as a separate layer and scored according to its priority for installing the device. The final suitability map shows that parts of the northwest of the county (Mansour Aghaei and Ghori Qaleh), the northeast of the Central District, and parts of the southwest are the most suitable sites for the anti-hail system, owing to their favorable topographic setting, adequate temperature and humidity, southwest-facing slopes, and conditions conducive to severe instability and hail. In total, about 32.6 km² of the county is relatively suitable and about 3 km² is highly suitable for installing the system.
کلیدواژهها English
