Modeling of Spatial and Temporal Variation in Nitrate-Nitrogen Concentration of Upper Lake Bhopal Using Best Subset Procedure
Shubham Agarwal,  Harsangeet Kaur
Upper Bhopal Lake, the largest water lake in M.P., India is located in the heart of Bhopal town. A number of water channels enter the lake from the human settlements around the lake and discharge polluted water in the lake bringing several chemical as well as sediments load in the lake. Eutrophication is one of the major problems in some part of the lake. Water quality may become so degraded that the lake’s original use are lost. Nitrogen is the limiting nutrients responsible for eutrophication of the lake. The physico-chemical status of Upper Lake (Bhopal, India) has been investigated during the year 2011-2015. Nitrate is the important nutrient in the lake loading through point and non-point pollution sources such as agricultural activities, domestic raw sewage, atmospheric precipitation and runoff. This nutrient support the fast growth of the aquatic plants as a result these plants lead to gradual shrinking of wetland area along with other complications like low light penetration, reduces oxygen concentration, clogging of water channels and lowers entertainment value of lake.
In the present study, Best subset procedure based on R2 and F values is used in model for predicting the Nitrate concentration. Regression model are developed in explaining variation in nitrate concentration using routinely measured parameters. The predicted value of nitrate is compared with observed values and reasonably good matching is obtained. Further, efficiency of the developed model was tested by error estimation using correlation statistics, standard error, t-test and ANOVA test. The developed model may be used for prediction of missing observed values of Nitrate concentration.
Keywords- Water quality parameters, Regression, Best subset, Nitrate modeling, Upper Bhopal Lake
Cite this Article
Shubham Agarwal,  Harsangeet Kaur,   "Modeling of Spatial and Temporal Variation in Nitrate-Nitrogen Concentration of Upper Lake Bhopal Using Best Subset Procedure"
, International Journal of Engineering Development and Research (IJEDR), ISSN:2321-9939, Volume.5, Issue 2, pp.1824-1830, June 2017, Available at :http://www.ijedr.org/papers/IJEDR1702286.pdf