Integrated management of the Upper Mersey river basin using the SMILE object-oriented software system
Spanou, M.; Chen, D.
Water Science and Technology a Journal of the International Association on Water Pollution Research 46(6-7): 105-112
2002
ISSN/ISBN: 0273-1223 PMID: 12380981 Document Number: 544980
This paper discusses the application of the object-oriented framework SMILE to the management of flows and water quality in the Upper Mersey river catchment in the North West of England. The design river flows were those exceeded for 95% of the time, and were estimated applying alternative methods. The influence of compensation reservoirs, surface-water abstractions, and continuous discharges on low river flows was quantified. The annual licensed abstraction volumes were further reviewed. The monitored river water quality was classified using the River Ecosystem scheme. The compliance of the sewage treatment works and trade effluents with their discharge-consent limits was also assessed. The impact of effluents on the variation of river water quality was evaluated through Monte Carlo simulations at the discharge points. The points where the downstream water quality fails to comply with proposed River Quality Objectives were identified. The consent limits of the corresponding discharges were assessed, and changes to the BOD (biochemical oxygen demand) and total ammonia limits were suggested.