The Effect of Synoptic Patterns on the Floods of the Southern Caspian Sea Coast, Case Study: Shafarood and Talar Rivers

Subject Areas : Geopolitic

بهلول Alijani ¹ , Gh Azizi ² , پرویز Rezaei ³

1 - ندارد
2 - ندارد
3 - ندارد

Received: 2015-01-17 Accepted : 2015-01-17 Published : 2004-04-20

Keywords: Southern Coasts of Caspian Sea, Synoptic Systems, floods, Talar and&#x0D, &#x0D, Shafarood Catchmen,

Abstract :

This research has been carried out in the southern coasts of Caspian Sea. Thisarea consists of about 150 catchments. Most of the rivers have small basin, covered byvegetation and confined by sea and mountains.In order Shafarood for the 1961-98 period were analysed. This period has nearlyexperienced 558 flood from which from which 59% belong to talar and Shafaroodcatchments, respectively. To determine the synoptic patterns of the floods, the surfaceand 500hP daily maps of 36 floods were analyzed. The result of the study showed that:The flood of Shafarood occurred mostly in the September to November periodand Talar floods in March and April.11% of the floods occurred simultaneously in both basins. The synoptic patternrespolsible fore these floods was the west of the Caspian Sea.The other floods were occurred when the through axis was moved over CaspianSea or to its east coasts. In These conditions Surface cyclones and anticyclones werevery important.The main moisture sources of the floods were the Medeaterian Sea for tha talarBasin and the Caspian Sea for the Shafarood Basin.