Chongqing Municipality, Gis-based Wind Speed Space Expansion

This paper based on the 30 years (1951-1980) average wind date of meteorological stations in ChongQing and its rounding area including SiChuan HuBei Etc . It aimed at the wind of rugged terrains, We use Geographic Information System date processing platform ,It can give us precision elevation from Digital Elevation Model (DEM) data, A vector interpolation method for complex terrain is discussed in this paper. A new weighted function is suggested here which includes a factor indicating the complexity of the hilly terrain . Comparison of the wind fieldinterpolated by this method to that interpolated by the 1/r2 method which onlyconcerns the distance variationis made. It shows that, over a hilly terrain, the suggested method is more effective to exclude the observation points disturbing computing estimating results. Since the suggested method makes a significant improvement in wind speed , it is more suitable for wind field estimation over complex terrain than other methods which only concerns the effect of distance. Then we calculate the wind change with evaluation, Last we can conclude the wind abase the hilly terrain , We find the wind in westward and center plain is much smaller than other area. While the wind in northward hilly area is much bigger with the hilly arising .The wind of ChongQing is the biggest period in spring (April) ,the smallest period in winter (January) ,the wind in Summer (July) is bigger than its in Autumn (October). We also take into account the relation of wind direction and hilly aspect to calculate the wind accurate distribution in ChongQing for different wind direction. The networkware's hilly aspect date is calculated with the ChongQing DEM (100m 100m) .It can provide base datum for Chongqing agriculture region compartment.