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June 21, 2007


Duanne Gilmore

I read your entry with great interest. I think you and the other blog writers have a lot of wonderful points. I have been lucky enough to be involved in some Master plans of large projects recently. The alarming water usage that we have experienced in the design of urban environments is irrigation demands for golf facilities (and treatment of pesticides that run off), residential irrigation and district cooling loads.

Even though district cooling on a holistic level is a more efficient system it produces a highly saline blowdown that is far from potable and too saline for groundwater recharge or irrigation. I have seen instances where by way of ecological research, the blowdown mixed with desalination brine, has been used to breed aquatic life while making use of planting to neutralise the salinity. This solution has provided an amenity for water byproduct that previously had no use. Another great example to reduce the irrigation demand is making use of saline water on golf courses, rather than potable especially in regions where it comes from a desalination source or in areas that have low rainfall. It is a simple solution by way of making use of Paspalum type grass rather that the conventional Bermuda which can not be irrigated with saline water.

Duanne Gilmore

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