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Drought_ Water Conservation_ and Water Supply Augmentation

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					Drought,Water Conservation, and Water Supply Augmentation
Todd C. Rasmussen, Ph.D.
Professor of Hydrology & Water Resources Warnell School of Forestry & Natural Resources The University of Georgia, Athens www.hydrology.uga.edu

Drought
• An extended period of months or years when a region is faced with a deficiency in its water supply • Droughts may by caused by:
– Increased demand, or need, for water – Decreased supply, or availability, of water

• Both factors contribute to our drought:
– Our region’s rainfall is below normal – Our region’s population is growing

10,000,000

Georgia's Population Growth
8,000,000

6,000,000
Population

Georgia Atlanta Metro Area
4,000,000

2,000,000

0 1900 1910 1920 1930 1940 1950 1960 1970 1980 1990 2000 2010

Source: www.selig.uga.edu/images/mapchg.JPG

Drought Levels
Drought Level 0 1 2 3 4 5 Reduction Consumption Reduction Goal (mgd) (mgd) 0% 20 0 2.5% 19.5 0.5 5% 19 1 10% 18 2 20% 16 4 30% 14 6

mgd = million gallons per day

Priority Uses
1. Medical and emergency facilities and emergency purposes
Such as fire suppression, and the use of water to satisfy federal, state, and local public health and safety requirements

2. Domestic and personal uses
Including drinking, cooking, washing, sanitary and health related uses and uses necessary to sustain domestic and livestock animals and personal food gardens (hand or drip irrigation only)

3. Commercial, industrial, and institutional uses 4. Refilling of ponds
Which existed prior to the declared drought, and only to the level necessary to maintain aquatic life within the pond prior to the declared drought. Also, hand watering of non-lawn turf landscape plants and watering of golf courses tees box/green areas

5. Outdoor irrigation
Uses such as lawn sprinkling (spray irrigation), irrigation of recreational/athletic fields and golf course fairways

6. Uses that do not sustain plant, animal, or human life, health or wellbeing and/or directly support established ongoing commercial, industrial, or institutional activities
Such uses include non-commercial and fund-raising car washing, filling of decorative water features, public fountains, water slides, wading pools, and topping off of public and private swimming pools

Water Conservation Options
• Goal (e.g., 40 gallons per person per day)
– Decrease water use where we live, work, and play

• Personal water use (e.g., 30 gal/day)
– Bathing, toilets, laundry, food preparation

• Outdoor water use (e.g., 1 gal/day)
– Lawns, gardens, fountains, swimming pools, car washes

• Commercial, industrial, and institutional water use
– – – – Air conditioning (cooling water) Dining halls (food and beverages) Laboratories (teaching and research) Hospitality (conferences and hotels)

Water Augmentation Options
• Leak Detection
– indoor (faucets & toilets) – outdoor (pipes)

• Storage (from local lakes)
– Limited due to small volumes – Suitable for irrigation and fire suppression – Can be treated in emergencies

• Groundwater (from wells)
– Limited due to shallow depth to bedrock
– Can supply limited quantities – Subject to contamination

Water Augmentation Options
• Water Reuse
– Grey Water
• Untreated wastewater reused at home • Not approved due to health concerns

– Purple Water
• Treated wastewater delivered from a central treatment facility • Suitable for
– Outdoor irrigation – Some cooling & industrial purposes

Clermont, FL


				
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posted:4/28/2008
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