1 background the grunnvåg waterworks is a water supply system is a on the island senja in troms in...
DESCRIPTION
3 NORWEGIAN UNIVERSITY OF LIFE SCIENCES THT282 Exercise E1. Well design – Grunnvåg waterworks Topographic map with drilled wells in rock (blue dots) and the source for Grunnvåg waterworks (blue star) 8 Department of Plant and Environmental Sciences, P.D. Jenssen The source of Grunnvåg waterworksTRANSCRIPT
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BACKGROUND
The Grunnvåg waterworks is a water supply system is a on the Island Senja in Troms in northern Norway. The system supplies 8, 1 home and 1 farm. The farm has plans for some tourist lodging. The source is a natural spring and a small dam is built to hold the water and act as a reservoir during periods of high consumption. The waterworks was constructed in 1951. At that time the requirements regarding hygienic safety barriers were not as strict as today. The spring itself provides high quality water, but the dam is liable to contamination. In order to meet current requirements of two hygienic barrieres the waterworks needs upgrading. This is also needed for the water to be certified for use by local tourist facilities.
TASKSWhat are the main threats to the water quality of the exisiting design? What changes would you suggest in order to upgrade the well design so that it meets current requirements? Make a schematic drawing of how you suggest to upgrade the design of the reservoir and water intake.
You find more information on the following slides
NORWEGIAN UNIVERSITY OF LIFE SCIENCES
www.umb.no
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Department of Plant and Environmental Sciences, P.D. Jenssen
THT282 Exercise E1. Well design – Grunnvåg waterworks
Grunnvåg waterworks Norway
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NORWEGIAN UNIVERSITY OF LIFE SCIENCES
www.umb.no
5
Department of Plant and Environmental Sciences, P.D. Jenssen
Intake pipe Overflow
Area of emerging water
Grunnvåg waterworksThe open reservoir at the source
For more information on the reservoir size click here
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NORWEGIAN UNIVERSITY OF LIFE SCIENCES
www.umb.no
THT282 Exercise E1. Well design – Grunnvåg waterworks
Topographic map with drilled wells in rock (blue dots) and the source for Grunnvåg waterworks (blue star)
8
Department of Plant and Environmental Sciences, P.D. Jenssen
The source of Grunnvåg waterworks
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NORWEGIAN UNIVERSITY OF LIFE SCIENCES
www.umb.no
3
Department of Plant and Environmental Sciences, P.D. Jenssen
THT282 Exercise E1. Well design – Grunnvåg waterworks
Topographic map with existing network (red lines)
The source of Grunnvåg waterworks
5
NORWEGIAN UNIVERSITY OF LIFE SCIENCES
www.umb.no
6
Department of Plant and Environmental Sciences, P.D. Jenssen
THT282 Exercise E1. Well design – Grunnvåg waterworks
The open reservoir at the source
Overflow
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NORWEGIAN UNIVERSITY OF LIFE SCIENCES
www.umb.no
7
Department of Plant and Environmental Sciences, P.D. Jenssen
THT282 Exercise E1. Well design – Grunnvåg waterworks
The intake pipe
7
NORWEGIAN UNIVERSITY OF LIFE SCIENCES
www.umb.no
7
Department of Plant and Environmental Sciences, P.D. Jenssen
THT282 Exercise E1. Well design – Grunnvåg waterworks
Further information and reading material
BRIKKE, F.; BREDERO, M. (2003): Linking Technology Choice with Operation and Maintenance in the context of community water supply and sanitation. A reference Document for Planners and Project Staff. Geneva: World Health Organization and IRC Water and Sanitation Centre. URL [Accessed: 30.03.2010]
Grunnvåg waterworks – current reservoir; LJ/PDJ