Comparative analysis of different techniques for spatial interpolation of phosphate concentration of Upper lake Bhopal.

Ajit Kumar Jain; S. K. Katiyar; M. S. Chauhan

Volume : IV, Issue : VIII, August - 2015

Comparative analysis of different techniques for spatial interpolation of phosphate concentration of Upper lake Bhopal.

Ajit Kumar Jain, S. K. Katiyar, M. S. Chauhan

Abstract :

For an efficient watershed planning & management quick and reliable water quality data is essential. However, in practice water quality data at every point in the watershed area may not be available. In such a situation, the water quality parameters are predicted at unknown waterquality parameter point by using mathematical models. Many methods to estimate water quality data at unmeasured point have been proposed in literature and most of these are based on spatial interpolation algorithms. In this research work different spatial interpolation methods have been used to produce a good continuous data set related to phosphate concentration in the Bhopal upper lake of Bhopal city. These methods investigated areInverse Distance Weighting, Local Polynomial Interpolation, Radial Basis Function, Ordinary Kriging, Simple Kriging, and Disjunctive Kriging. Optimization of different parameters of the interpolation methods has been carried out with a subset of the available dataset while the remaining subset was used to validate the results obtained by the different methods. Validation results indicate that Simple Kriging is the most suitable method with mean error 0.076 and Root Mean Square 0.084.