A new and superior approach to classification, called the General Quality Assessment (GQA) Scheme has been developed to replace the National Water Council (NWC) classification. This report describes the chemistry component of the new scheme and the results which were obtained when it was applied to the assessment of river and canal quality for the periods 1988-90 and 1991-92 for England and Wales.
There are currently no reviews for this product. Be the first to review this product!
Your orders support book donation projects
I have always been MOST impressed by the efficiency, courtesy, integrity and professionalism of NHBS!
Search and browse over 110,000 wildlife and science products
Multi-currency. Secure worldwide shipping
Wildlife, science and conservation since 1985