Development of rainfall-recharge models for Udaipur district, Rajasthan.

摘要

In the present study, Udaipur district was selected as a study area, which is situated in southern part of the largest and driest state (Rajasthan) of India. It consists of 11 blocks (viz., Badgaon, Bhinder, Dhariawad, Girwa, Gogunda, Jhadol, Kherwara, Kotra, Mavli, Salumber and Sarada). The six models were developed for this study to develop rainfall-recharge models for the 11 blocks of study area. The six models tried were namely linear model, logarithmic model, exponential model and polynomial model of 2, 3 and 4th order. The groundwater recharge estimated by newly developed models and groundwater recharge by water balance method were compared using correlation coefficient, root mean square error, standard error and per cent deviation with observed recharge. Results show that linear model, logarithmic model, exponential model were found to be suitable for all 25 zones. However, considering correlation coefficient, root mean square error, standard error and per cent deviation with observed recharge logarithmic model showed high value of correlation coefficient, less root mean square error, less standard error and less per cent deviation with observed recharge as compared to linear and exponential models. Therefore, it was recommended that logarithmic model was found suitable for Udaipur region.