Maximum flood discharge estimationfor Torbat Heydarieh watershed

Abstract

One of the important problems in watershed management and water resources planning is to maximum flood discharge estimation for small watersheds, due to a lack of hydrometric stations or data. In this study, two sets of methods were evaluated for determining the peak flood discharge, one is based on watershed area and another is based on physiographic and rain factors of the Watersheds. Watersheds were selected in Torbat Heydarieh to determining rain depth efficient. The objective of this study was to find suitable methods for maximum flood discharge estimation in small watersheds. To choose the appropriate method for estimating the flood peak discharge, various factors such as annual rainfall, maximum 24-hour rainfall, basin area, vegetation status, soil permeability, basin slope, length of the main waterway, as well as field visits to the area and measurements The temperature of the outlet water of a number of waterways should be taken into consideration. The regional mathematical model method underestimates the flood values, which is not consistent with the conditions of the basin, and the two Fuller and Krieger methods provide the same results for the basin, as a result of the fuller point method for the flood estimate is selected.