Spatial Analysis of Precipitation Persistency in Kurdistan Province

In order to doing this study, daily precipitation data from 188 synoptic, climatology and rain gauge over and out of Kurdistan province during 1/1/1340 to 30/10/1389 have been used. For every day one digital map in dimension 6*6 km has been created by Kriging method. Then data of 811 pixels that covers whole of the province extracted from daily maps. One data base 18203*811 created that days located on the rows and pixels on the columns. The results of this study showed that precipitation persistency over province is between 1 to 37 days. Persistency of 1 to 9 days over whole province has been observed. The long persistency in semi western parts of province is more frequent. The short persistency (1 to 2 days) assigns to high percent of rainy days and is more partnership in amount of precipitation in semi eastern parts of province. The spatial importance of persistency shows significant importance of this precipitation for semi eastern parts of province. Increase in persistency result in decrease partnership in total rainy days. In semi western parts of province long time persistency (4 to 9 days) have high partnership in total rainy days and amount of precipitation while spatial precipitation persistency is maximum for other parts of province. This shows that long time precipitations persistency are regular for semi western parts of province and extreme for central and semi eastern parts of province.