试论深圳水危机及珠三角‘咸潮入侵’问题的治本之策

fter decades rapid economical growth, Pear River Delta’s sustainable development in the near future may slow down due to problems of water supply and water pollution. The water crisis in this region includes that the water deficient constrains the economic returns and the expansion of city size. Particularly, metropolises like Guangzhou, Hong Kong, Macao and Shenzhen are threatened by water shortage in the drought period. The Pearl River estuary shows a typical salt water intrusion occurs. It’s estimated that more than 1.5 million people will be affected by salt water intrusion by the end of 2005. As an example of water crisis, Shengzhen’s water supply cannot meet its demand, all streams are severely polluted and the ecosystem deteriorates. One of the major challenges of local government is how to find good and enough freshwater for its portable and ecosystem demands. This investigation demonstrates that if the coastal reservoirs were build in the sea to store the local runoff in storm seasons, all water issues could be completely solved or greatly alleviated, detail analysis is provided on how to increase the water supply, counter-measures on water pollutions and seawater intrusion are also discussed. The new strategy suggests that for all coastal cities, the main battlefield of water resources development should be shifted to the sea from the land.