Presently, in some countries of the world like Iran, where quantitative and qualitative limitation of water resources, is one of the main obstacles in access
to sustainable development programs goals, PEPs through cloud seeding are
preformed in order to reduce and resolve the environmental problems.
Although the main part of the site-selection studies which are the scientific
base for PEPs is climatology of clouds and precipitation, winds and upper air
currents in each type of weather have special characteristics in standard levels
of the atmosphere, and in each synoptic and thermodynamic atmospheric
conditions they are the important indicator of air situation such as stability,
instability, and so on. So climatological study of these parameters can provide
necessary information for PEPs planners.
In this research using the Isfahan synoptic and upper air stations and
through drawing the wind roses, we have firstly studied wind speed and
direction in atmospheric standard levels (500, 700 Hpa and surface), and then
the monthly distribution of mean percent occurrence of above winds in 16
different directions. Finally, through classifying winds into two groups, light
and fast winds, we have studied their speed.
As a result, we have shown that in the rainy periods the winds and upper
air currents can bring the necessary humidity and energy for seedable cloud
formation and precipitation occurence in the above mentioned basin.