This quiz will test your knowledge of the various projects and sources that are being developed to reduce our dependence on the Edwards.
One of the methods being used to increase recharge to the Edwards is cloud-seeding, but in 2003, the National Academy of Sciences concluded there is no scientific evidence that it works.
Most water planners in the Edwards region use the "drought of record" of the 1950s as the basis for development of adequate water supplies. A tree-ring study completed in 2006 suggested that several droughts which were more severe than the 1950s drought have occurred since 1648. This has important implications for our development of alternate water supplies.
One of the methods proposed to increase water availability from the Edwards is removal of cedar trees, which are common in the Edwards region. They are thirsty water thirsty hogs that rob water from the Aquifer.
There is a lot of brackish groundwater south of San Antonio that could be treated and used to reduce demand on the Edwards.
The San Antonio Water System has successfully reduced Edwards pumpage through:
a) aquifer storage and recovery
b) use of recycled water
d) public education
e) all of the above
Rainwater harvesting is one of the world's oldest water supply methods and it is currently enjoying a revival in popularity.
Most of the good sites to put recharge dams are already taken.
The San Antonio Water Systemís recycled water distribution system:
a) is the largest in the country
b) reduces Edwards pumping by up to 25,000 acre-feet per year
c) has helped to protect endangered species habitats
d) all of the above
The Trinity Aquifer is the source of water for much of the Texas Hill Country, and is expected to see steep water level declines over the next 50 years. This will have implications for the Edwards Aquifer as well and will impact development of alternatives to the Edwards.
The cheapest and easiest new water source is conservation. San Antonio has become the nationís poster child for conservation, with a per capita consumption rate lower than many desert cities.