Hi,

Here some information for West European rivers. Also the possible to download the program Astrics estimating water quality indexes using in EU. I'm not sure that it will works in India as well as in Europe, but I think it will be useful.

Best wishes,

Tatiana

http://www.fliessgewaesserbewertung.de/en/download/

It is possible to utilize geospatial imagery and false color GIS imagery to show dissolved organic carbon in bodies of water.  DOC is a marker for human based pollution.  This one of the only "global" monitoring resource opportunities that can be utilized by a remote viewer without having to deploy technology.  It does however require specialized expertise and access to be utilized. 

Here some information in the book: The Ecological Status of European Rivers:

Evaluation and Intercalibration of Assessment Methods. Springer, 2006.

Thank you so much for all your valuable additions regarding my topic of interest. i will be get you all sooner after go thoroughgoing all things 

sediment health in aquatic bodies is very crucial and is worthy of consideration. I did some work on aquatic water body health as impacted with the tanning industry, kindly peruse the following paper (I hope and pray it is helpful);

 Mwinyikione Mwinyihija, Andy Meharg, Julian Dawson, Norval J.C. Strachan and Ken Killham (2006). An ecotoxicological approach to assessing the impact of tanning Industry effluent on river health. Archives of Environmental contamination and Toxicology, 50(3):316. 

Morning Mophin. In South Africa there is a sweet of indices (diatoms, macro-invertebrates, fish, riparian vegetation, WQ, habitat and the EcoStatus) used to determine the health of aquatic ecosystems. In addition, the Risk Assessment is used to look at the drivers to determine the impacts on the responses to the impacts.

Hi.

Some other current tools for assessing pollution status of aquatic ecosystems includes the use of cell lines (in situ biomonitoring), use of biometric ratios and sediment toxicity screening guidelines by US NOAA.

Trends are also moving towards the use of fish early life stages/embryos for monitoring sediment toxicity. 

An example of a published paper in this regards is:

Matteo Minghetti, Sabine Schnell, Michael A. Chadwick,Christer Hogstrand and Nic R. Bury (2014). A primary FIsh Gill Cell System (FIGCS) for environmental monitoring of river waters. Aquatic Toxicology 154:184–192

Hope this helps. Regards.

Recently, in numerous articles in the press, algae blooms in particular are identified as part of the problem.  This is an incorrect assumption.  The algae is an important member of the aquatic biota and the food chain, that in a normal ecosystem dynamic is a natural purification system.  In nearly every case the algae blooms are an indicator of anthropogenic influences such as excess nutrient pollution which would be re-balanced in the normal ecosystem dynamic.

Thank you all for your valuable recommendations;

current trends in pollution research now include molecular aspects to understand how pollution affects gene expression and ultimately the survival of an organism in its habitat.

..for instance checking the expression of  proteins called HIFs (hypoxia inducible factors) in wild aquatic organisms can give a ready pointer to whether they are living in hypoxic conditions or not.

Critical question you have ask........I think if you monitoring or predicting pollution in aquatic water bodies......you can used bio indicator organisms or some physicochemical parameters......