Modelling Landcover and rainfall data for estimating ground water table fluctuations
Model Calibration
The model was calibrated in a part of Indogangetic plain of about 200 Sq. Km. bounded between Yamuna and Hindon rivers. Using data from 1973-1978 the model (equation 2) was calibrated, and vector R has been evaluated by (O.P. Dubey et al. 1988):
- Conventional Inversion
R = A-1 G ----------------------(3)
- GLI
R = A- G = Vp A ^-1 U TP -----------------------(4)
- MPI
R = A+ G = A* (A* AA*)-1 A*G ----------------------------(5)
Where,
A-1 = Conventional inverse of A operator
A- = GLI of A operator
A+ = MPI of A operator
VP = P eigen vectors accociated with rows
U p1 = P eigen vectors accociated with columns
A ^-1 = Diagonal matrix P non zero eigen values of A.
Estimation of the fluctuations
Once the model was calibrated the ground water table fluctuations can be predicted using equation (2) above if land cover and rainfall is known.
Results and Discussinon
once the model calibrated the ground water table fluctuations can be predicted using this technique only.
For the year 1980 the observed and predicted values of the ground water table fluctuations for some stations has been tabulated in Table I. The results compare well.
Ground water level fluctuations
TABLE I
| Location |
Fluctuations
(in m) |
| Obsered |
Predicated |
Badshahibag
Behat
Mirijapur
Raipur
Sidhau liquadim |
9.94
2.72
4.14
4.17
3.12 |
5.00
2.54
4.50
4.30
3.01 |
The author is thankful to IIRS, NRSA, GWIO, CBIP etc. for their help in carrying out the study, his friend for live discussions and shri Ashok K. Sharma for neat and timely typing of the manuscript
References
- Chow Ven te. 1964. Hand Book of Applied Hydrology. McGraw Hill Book Co.
- Dubey O.P.; Sri Niwas ; Awasthi A.K. ; 1984. Analysis of Remotelysensed Data For ground water studies of piedmont Zone , Proc. 5th ACRS Kathmandu , PP 6-1-E-6-4.
- Dubey O.P.; Sri Niwas; Parvez Ahmed; 1989 Deciphering Ground Water using Remotesensing Techniques . Proc. International conference on development of modern techniques to ground water studies; hyderbad.
- Dubey o.p. sri Niwas; Awasthi A.K. ; 1989 , predicting Water Table Depth Using remotelysense Data . 10th Asian conference on Remote sensing, Kullalumpur.
