Groundwater Balance Study in the High Barind, Bangladesh

Abstract

The annual groundwater recharge and discharge of aquifer of the Sapahar and Porsha Upazillas is estimated by Thiessen polygon method varies from 106.41 to 244 Mm³ and 93.77 to 291 Mm³ respectively. The calculated groundwater recharge of aquifer of the study area shows that the rate of groundwater recharge of aquifer in Porsha Upazilla is higher than that of Sapahar Upazilla and is characterized by very suitable groundwater storage potential. The overall groundwater balance study in the study area indicates that there exists a balance between annual recharge and withdrawal up to 1993 but after period of 1993 discharge exceeds the recharge continuing till today. But hereforth a cumulative annual deficit is found to exist because of progressive annual discharge in Sapahar Upazilla. 23.99 to 42.08 Mm³ of groundwater is discharged by discharging mechanisms. The rest of groundwater is discharged by natural seepage.

DOI: http://dx.doi.org/10.3329/rujs.v39i0.16539

Rajshahi University J. of Sci. 39, 11-26 (2011)