Evaluation of Spatial and Temporal Variations in Water Quality of River Ganga
In this study, statistical hypothesis tests are carried out to identify spatial and temporal patterns in Ganga river water quality. Data for eight water quality components - Temperature, pH, Dissolved oxygen, Biological Oxygen Demand, Chemical Oxygen Demand, Total Coliform, Fecal Coliform and Total Kjeldahl Nitrogen measured at 34 stations along the river for each month of the year 2004 and 2009 were used for analysis. In order to obtain meaningful water quality information that is understandable to legislative decision makers, Water Quality Index (WQI) was computed from the measured values of water components. A custom R package was written to compute the unweighted arithmetic water quality indices. The hypothesis for spatial, temporal, and seasonal changes in computed WQI values were defined. These were tested using Moran’s I, Mann Kendall, and Wilcoxon tests. The result from hypothesis tests revealed significant spatial correlation in values of WQI whereas WQI values were not found to vary significantly for the year 2004 and 2009.
Disclaimer/Regarding indexing issue:
We have provided the online access of all issues and papers to the indexing agencies (as given on journal web site). It’s depend on indexing agencies when, how and what manner they can index or not. Hence, we like to inform that on the basis of earlier indexing, we can’t predict the today or future indexing policy of third party (i.e. indexing agencies) as they have right to discontinue any journal at any time without prior information to the journal. So, please neither sends any question nor expects any answer from us on the behalf of third party i.e. indexing agencies.Hence, we will not issue any certificate or letter for indexing issue. Our role is just to provide the online access to them. So we do properly this and one can visit indexing agencies website to get the authentic information. Also: DOI is paid service which provided by a third party. We never mentioned that we go for this for our any journal. However, journal have no objection if author go directly for this paid DOI service.