, Volume 9, Issue 1, pp 43–55 | Cite as

Computer model for vedavati ground water basin. Part 2. Regional model

  • K Sridharan
  • N S Lakshmana Rao
  • M S Mohan Kumar
  • V Ramesam


A computer model for regional ground water resource evaluation, based on the leaky aquifer concept, is presented for the Vedavati basin which is a crystalline hard rock area of 24,200 km2 in Peninsular India. The model can handle nonhomogeneity, anisotropy, varied pumping, rainfall and river stages. The model is calibrated based on regional water level observations for one year. The calibrated model is used to determine the distribution of safe yield, overexploited regions and regions of maximum potential over the basin. Regions which are most affected by drought conditions are also identified.


Ground water regional model computer model hard rock leaky aquifer 

List of symbols


area ofith block


total basin area


leakage coefficient


difference between computed results and field observations of water levels inith block


error norm


recharge factor

h, h

head in the aquifer and watertable head, respectively


head in the aquifer and watertable head at previous time level, respectively


number of blocks, columns in the finite difference grid, river nodes, rows in the finite difference grid and periods over which data is provided, respectively

Q′,Qi, j

ground water withdrawal rate per unit area and at node (i,j) respectively


net recharge per unit area


rainfall per unit area per day


storage coefficient of deeper aquifer


specific yield of aquitard

Tx, Ty

transmissivities in thex direction and in they direction, respectively

x, y

coordinate directions in plan, northeast-southwest and northwest-southeast, respectively

Δx, Δt

space and time steps


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Copyright information

© Indian Academy of Sciences 1979

Authors and Affiliations

  • K Sridharan
    • 1
  • N S Lakshmana Rao
    • 1
  • M S Mohan Kumar
    • 1
  • V Ramesam
    • 1
    • 2
  1. 1.Department of Civil EngineeringIndian Institute of ScienceBangaloreIndia
  2. 2.Central Ground Water BoardJayanagar, BangaloreIndia

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