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Groundwater model of waterlogged area of Indira Gandhi Nahar Pariyojna, Stage I
This article presents a conceptual groundwater model for the Indira Gandhi Nahar Pariyojna, Stage I area, falling in Hanumangarh and Sriganganagar districts of Rajasthan, that is facing a serious problem of waterlogging and soil salinity. The model developed is then converted to a finite difference mathematical model. Existing MODFLOW Code is then used to run, calibrate and validate the model. The validated model is used to predict the future outcome of various undergoing as well as proposed measures of arresting waterlogging initiated by the Irrigation Department, Government of Rajasthan. Historical data of 100 piezometers in the area, lithologs, remote sensing data and other auxiliary data were used to develop, calibrate and validate the model. Input to groundwater storage from seepage of canals, return flow from irrigation, infiltration from depressions, outflow from evapo-transpiration and withdrawal from proposed surface drain etc. have been considered in the model. A conceptual model was developed adopting a true layer approach and creating six coverages. These coverages were sources/sinks, recharge zones, evapo-transpiration and three soil layers with different zones of hydraulic conductivity. The conceptual model was, then, converted to a finite difference model, which was calibrated and validated by changing the various input parameters such as hydraulic conductivity and storage coefficients, within the prescribed range, so that the combined root mean square error between the observed and simulated heads (1990–1995) of 10 identified calibration targets was minimised. The model was, then, subsequently utilised for predicting the output of various water use management strategies.
Groundwater model of waterlogged area of Indira Gandhi Nahar Pariyojna, Stage I
This article presents a conceptual groundwater model for the Indira Gandhi Nahar Pariyojna, Stage I area, falling in Hanumangarh and Sriganganagar districts of Rajasthan, that is facing a serious problem of waterlogging and soil salinity. The model developed is then converted to a finite difference mathematical model. Existing MODFLOW Code is then used to run, calibrate and validate the model. The validated model is used to predict the future outcome of various undergoing as well as proposed measures of arresting waterlogging initiated by the Irrigation Department, Government of Rajasthan. Historical data of 100 piezometers in the area, lithologs, remote sensing data and other auxiliary data were used to develop, calibrate and validate the model. Input to groundwater storage from seepage of canals, return flow from irrigation, infiltration from depressions, outflow from evapo-transpiration and withdrawal from proposed surface drain etc. have been considered in the model. A conceptual model was developed adopting a true layer approach and creating six coverages. These coverages were sources/sinks, recharge zones, evapo-transpiration and three soil layers with different zones of hydraulic conductivity. The conceptual model was, then, converted to a finite difference model, which was calibrated and validated by changing the various input parameters such as hydraulic conductivity and storage coefficients, within the prescribed range, so that the combined root mean square error between the observed and simulated heads (1990–1995) of 10 identified calibration targets was minimised. The model was, then, subsequently utilised for predicting the output of various water use management strategies.
Groundwater model of waterlogged area of Indira Gandhi Nahar Pariyojna, Stage I
Arora, A.N. (Autor:in) / Goyal, Rohit (Autor:in)
ISH Journal of Hydraulic Engineering ; 18 ; 45-53
01.03.2012
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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