Entries For: May 2007

Principle Characteristics

• The study Involves both quantity and quality aspects
• Localize in the center of North America, along 8 states: Wyoming, South Dakota, Nebraska, Colorado, Kansas, New Mexico Oklahoma and Texas.
• Covered area 450.000 km2
• 130.000 water wells - the monitoring is done by the USGS
• Each State determines its own water law.
• In high plains area is not only one aquifer but also 6 mayor hydrologic units 
• The major amount of water is in Nebraska
• The precipitation values decrease from W to E and the temperatures increased from North to South
• Climate variability includes – PDO, ENSO, AMO and NAMS studies.
• Climate diagram between year 0 and 2000 shows the 1930 drought and dust bowl
• The paleo-recharge is measured by C14-

Groundwater study

• Carried out between 1998 – 2004
• The core team is in Colorado and local USGS personal.
• Nested studies - USGS methodology.
• Unsaturated zone study - 
• Regional Transect Study -
• Land-use study, Urban agricultural studies -
• Mayor Aquifers studies –
• STR MODEL – (Source transport receptor)
• Unsaturated zone study methods
• Movement influence human
• Climate induced episodic deep percolatio
• Climate induced mobilization of chemicals (concentrations of chloride, nitrate)
• Isotopes and management
• Effect of pumping and water quality

Blog Rapporteur: Miguel Angel Giraut, NC Argentina

Summary

• The name of the organism is because the sweet water river 
• It´s a company that desalinates brackish groundwater
• The water supplied is for user supply and agricultural along southwest California
• Area 180.000 km2 - along Chula Vista, Bonita and National City.
• 124 Gallons / day per person
• Two different kinds of desalination methods: Heat and Inverse osmosis.
• The disadvantages of the water desalination method is that consumes a lot of energy –
• Actually the cost decreased 1/3.
• The 20 % of the energy of the state are used for water desalination
• Why do they have to use water desalination?
• During the ´90 increased the population
• During 1900 –1950 water supply was based on Sweet Water Dam, and Love land Dam, although the river flow 3 - 4 months of the year.
• Since 1999 was implemented the osmosis inverse method

Visit to Stream water installation

• Get water from a battery of 6 water wells
• The residual water is sent back through a channel to the river and water supply to 40000 persons.
• They are making research to evaluate what they can do with the salt material

Blog Rapporteur: Miguel Angel Giraut, NC Argentina