Modeling groundwater source catchments in the UK: Implementation and review of a qualitative method for representing uncertainty
- Water Management Consultants Ltd., Shrewsbury (United Kingdom)
- National Rivers Authority, West Midlands (United Kingdom). Groundwater Centre
- NRA, West Midlands (United Kingdom). Severn Trent Region
The UK National Rivers Authority Groundwater Protection Policy seeks to restrict certain polluting activities in the catchments and defined time of travel zones (TOTZs) to potable groundwater sources. The size, shape and location of catchments and TOTZs is controlled to a great extent by factors which are poorly defined. A practical qualitative method was developed to represent parameter uncertainty within the context of deterministic modeling (finite difference steady state 2D). Plausible models of the groundwater systems were developed by a standardized procedure so that some of the uncertainties could be represented, and a simple postprocessing technique was developed to provide a geographic representation of zones which are predicted to be definitely within the catchment or TOTZ (Zone of Confidence) or potentially within the catchment or TOTZ (Zone of Uncertainty). A summary of the experience of the first 133 sources zoned is presented.
- OSTI ID:
- 516762
- Report Number(s):
- CONF-9606343-; ISBN 0-8031-2021-4; TRN: IM9738%%72
- Resource Relation:
- Conference: Subsurface fluid-flow (ground-water and Vadose Zone) modeling, Denver, CO (United States), 22-23 Jun 1996; Other Information: PBD: 1996; Related Information: Is Part Of Subsurface fluid-flow (groundwater and vadose zone) modeling; Ritchey, J.D.; Rumbaugh, J.O. [eds.]; PB: 434 p.; ASTM STP 1288
- Country of Publication:
- United States
- Language:
- English
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