ESTIMATION OF GROUNDWATER RECHARGE IN BADRA-JASSAN BASIN USING ANNUAL WATER SURPLUS METHOD

Abstract

Badra - Jassan basin is one of the Iraqi border basins which recently has been
reconstructed of its regions and expanded of its irrigated land to serve the Citizens of
the area. In terms of hydrological condition, Galal Badra River Basin is divided into
two parts where the first part located in Iran, and this part supports most of the
discharge of the river basin according to achieved runoff within the area. Second
part of the river basin is located in Iraq covering area of (300 km2). Depending on
climate data measured in Badra meteorological station for the period (2001-1994),
the climate was characterized to be continental semi-arid with annual total rainfall
reached (221) mm and the evaporation from basin class A reached (3156) mm.
Water balance were calculated in the basin using two methods, the first one depends
on monthly averages for rainfall and actual evapotranspiration during the period
(2001-1994). While in the second method, the water surplus was calculated
depending on calculation of each parameter in each year separately and use
mathematical formula to calculate the runoff achieved in River basin of Badra. The