Machine summary:
"5. Conclusion Based on what has been stated so far, the establishment of thermal units at ground level, occurrence of blocking at the upper levels of the atmosphere and the deployment of high contours and stacks on the studied area, thickness of the atmosphere and hot thermal wind above the region with the dominance of thermal conditions and a high temperature alongside atmosphere stability and negative vorticity flow which has resulted in the subsidence of the warm air flow of southern latitudes from upper levels to the ground level together with very low relative humidity (10%) which has imposed a dry atmosphere on the climate of Dezful, have provided the necessary conditions for the occurrence of fire at the forests of Dezful.
Therefore, the present study aims to investigate different factors affecting mesoscal convective systems from Zagros heights, and analyze their life cycle dynamic conditions using brightness temperature threshold, area expansion and RegCM4 numerical modeling.
4. Conclusion By considering simulation results and comparing them with control run consequences and reviewing the theory studied, it can be concluded that RegCM model for indicating Zagros mountain chain role in mesoscal convective systems life cycle, which is located in west of Iran and is related dynamic and physical quantities, acts successfully and its function is acceptable.
4. Results and discussion The comparison of land use map in 2002 and 2013 of total of study basin indicates that dry farming, agriculture, forest, residential settlements and marsh land uses have increased while water surface, canebrake, and deserts as well as rangelands have decreased."