Zoning probability of maximum daily precipitation In Hamedan Province

Two important characteristics of the Hamedan Climatic condition is uneven precipitation distribution and of 24-hour maximum precipitation between 20th of March and 20th of April. This large amount of the rainfall matter enhances probability of occurring dangerous flood this province. In this area precipitation is snow and its melting time is the same time of the rain. Therefore, at this date the Water River increases. In the other months of year the reason of flood is due to the uncovered land. The factors flood in Hamedan province is divers. the important causes of flooding in the area include: weather, Inequlity, Vegetation, act.Heavy rains cause flooding is the most basic.in this study, maximum daily precipitation in order to predict the valume of water extractive due to flooding and water resources management planning, is studied. For this purpose, according to the maximum 24-hour rainfall, map elevation model and gradient precipition and rain map area for the return period 2,10, 25, 50, using the best statistical distribution for the region (Gumble Distribution) was estimated and zoing in the GIS (Kriging method) environment by reducing the return period, daily rainfall is likely to decrease.Accordingly in the back of the above Soath East and North West provence has the highest daily rainfall is possible that the frequency of floods occurred the province reflects this fact that the most devastating floods in these areas and devoted. (floods in 1366 in the region of Kabudarahang) the maps Eastern province PMP least daily. The results of these studies can be expected in the zoning and flood, as well as planning and management of water resources used.