Dear Roy,

you can refer the book of R.K Trevedi and GoelP.K. 1984, named Chemical and Biological method for water plooution study. This book will definately helps you to calrifies your doubts and gives clearcut illustration of the methodology of biomonitoring.

Best regards

see also Standard Methods for the Examination of Water and Wastewater:  

Here's the link

http://www.standardmethods.org

http://www.standardmethods.org

1. APHA

2. Trivedy, R.K., Goel, P.K., 1984. Chemical and Biological Methods for Water Pollution Studies. Environmental Publications, Karad (India).

3. Give your e mail ID iI shall try to send you a e book ([email protected])

Sir,

These are some important references best for analysis of water quality and bio-monitoring

Adoni, A. D., Joshi, G, Ghosh, K., Chourasia, S. K. and Verma, H. G. (1985). Workbook on Limnology.

Trivedi, R. K. and Goel, P. K. (1984). Chemical and Biological methods for water

pollution status. Environmental publication, Karad (India).

Tonapi, G. T. (1980). Freshwater animals of India an ecological approach. Oxford and IBH Publishing Company, New Delhi. pp. 314-315.

Michael, R. G. (1984). Ecological methods for laboratory and field investigations. Tata  McGraw Hill publishing Company Ltd. New Delhi.

Needham, J. G. and Needham, P. R. (1962). A guide to freshwater biology. Holden Day Ins., San Francisco (USA).

With regards

Maybe you can look for:

Robert G. Wetzel and Gene E. Likens: Limnological Analyses, 3rd Edition, Springer: New York, 2000.

For identification, u can also consult Freshwater Biology by Edmondson ( especially for algae). 

In terms of framework, you need to read the paper by Håkanson on Bioindicators.

here it is

http://www.sciencedirect.com/science/article/pii/S0964569107000427