As for aquaculture, not only is it concentrated along the coast, the water is extracted during the day, and when the weather is cold it is pumped non-stop to maintain the water temperature of the fish ponds. Also, because the deep-stratum aquifers have the best water, all the wells are sunk down to two or three hundred meters.
以養殖業來說，不但集中在沿海，且都在白天抽取，天冷時為了保持養殖池水溫，更是猛抽不止，而且由於深層含水層水質佳，所有的水井都深入地下二、三百公尺。