dr_boogs said:
Would like to hear more from your perspective on the desalination plants. The fishing conservationists I know on the lower coast think they are a terrible idea (for the fishery and coastal habitat) and that they will have considerable negative impacts on the fisheries for miles around the plants' outflows/discharge areas.
I assume environmental impact will be affected by discharge location and tidal flow. I do understand the benefit for the population centers.
It all depends on how and where the brine is handled and discharged, also from where the source water comes. Hard to say with any real certainty that it is good, terrible or whatever impact because every area is different and has different ecosystems.
BWA is looking at a desal plant near their facility in Lake Jackson, with the brine being discharged into the Brazos. I asked BWA's manager about impacts from the brine discharge - it will be almost negligible in the Brazos because the Brazos is brackish water all the way up to at least Brazoria. Can't remember the salinity numbers, but it wouldn't have more than a few ppm impact.
I'm a fan of desal, because we have unlimited water as the source. The only drawback is the expense, but with newer and newer filtration technologies, it has gotten cheaper to produce and you can source more saline water than prevously able to.
I'm not particularly a fan of using brackish aquifers, because subsidence all along the coast is an issue. I'd rather see more cost up front go into intakes from surface waters (not the bays) via pipelines from the gulf, but that's a lot of cost and maintenance.