عنوان مقاله [English]
نویسندگان [English]چکیده [English]
In this research to control the floods in drainage basins (in the area kheirroud of
Nowshahr to Sardabrud of Chalous), the mean of flood discharge with different return
periods were estimated and analyzed using regional analysis method. To estimate and
analyze the floods, at first the basic raw data of annual peak discharge for the gauging
stations in the region were collected, then missing data was filled and new statistics,
generated. The 29-year periods for this case were selected. Then, point analysis was
done by the use of different statistical distributions. After they were studied, Log
Pearson Type III distribution was selected as the region. Then, Homogenity Test was
done by the use of Run Test method. Moreover, the area of drainage basins was
measured. After measuring the level of significance (in level of 0.05) between area of
drainage basins and mean flood discharge, it’s linear equation was obtained and on the
basis of it, mean flood discharge with the different return periods in ungauged drainage
basins was estimated.
The results of estimation and studies have shown that, chalous watershed
(drainage basin) has the most meant flood discharge value among the six watersheds.
Other watersheds are as follows: sardabrud, kheirroud, kurkursar, and mashalak,
Kheirsar-neirang (gerdekal rud or shalerud).