Groundwater modelling of the Chepstow Block, South Wales, UK.


Author : Ismail Yusoff & Bahaa-Eldin E. A. RahimPublication : Bulletin of the Geological Society of MalaysiaVolume : 54Page : 37-45Year : 2008


Description

Bulletin of the Geological Society of Malaysia, Volume 54, November 2008, pp. 37 - 45

 

Groundwater modelling of the Chepstow Block, South Wales, UK

Ismail Yusoff* & Bahaa-eldin E. A. Rahim

Geology Department, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia

*E-mail address: ismaily70@um.edu.my

 

Abstract— In this groundwater modelling study, a simplified conceptual model of the Chepstow Block hydrogeological unit was calibrated using the Aquifer Simulation Model (ASM) program under steady-state conditions. The initial aquifer boundaries of the model and its changing conditions were investigated. The model was found to be insensitive to changes in the boundary conditions. It was also found that the Nadern Fault within the Block plays an important role in drawing water from the north to the Great Spring. During the calibration process, it was difficult and impossible to calibrate the model without incorporating a low permeable boundary parallel to the Nadern Fault.

 

Abstrak— Dalam kajian pemodelan air tanah ini, ringkasan model konsepsi aliran air tanah tunak (steady state) unit hidrogeologi Chepstow Block telah ditentukurkan dengan menggunakan program Aquifer Simulation Model (ASM). Sempadan permulaan akuifer dan kesan perubahannya telah dikaji. Adalah didapati model simulasi adalah tidak sensitif kepada perubahan sempadan akuifer. Juga didapati Sesar Nadern di dalam Blok ini memainkan peranan penting di dalam membawa air tanah dari kawasan utara ke Great Spring. Dalam proses tentukur model adalah didapati amat sukar dan tidak mungkin model akuifer ini boleh ditentukurkan tanpa memasukkan sempadan berketelapan rendah sejajar dengan Sesar Nadern.

Keywords: groundwater modelling, hydrogeology, Chepstow Block