摘要
中国是淡水资源比较贫乏的国家之一,人均占有量仅为世界人口平均占有量的四分之一,尤其是沿海经济发达区和岛屿地区缺水状况更十分突出,严重地影响了国民经济可持续增长和人民生活的需要。根据长江三角洲地区古地理环境、地层及水文地质特征,认为在浙江省舟山市嵊泗海域可能存在更新世时期长江古河道,下更新统地层中可能赋存承压含水层。在20世纪90年代,经过对嵊泗海域海底物探和钻探勘察,基本证实了上述推断的正确性,并发现在下更新统地层中存在五个承压含水层,其中四个含水层为淡水,总厚度可达60m,日出水量约3000t,初步估算海底淡水总资源量约38×108m3。该项工作填补了我国海底寻找淡水资源的空白,对解决沿海和岛屿地区严重缺水状况有着深远的意义。
China is one of the countries lacks of fresh water. The fresh water possessed by one person is only one fourth of the world level. The lack of fresh water, especially in East China area and islands, seriously deter the development of the economy and living standard in these area. According to the analysis of the paleogeography, paleo - stratigraphy and the character of the hydrogeology, the paleo - channel of Yangtze River （ Pleistocene or earlier ） may exist around Chengsi island, Zhoushang, Zhejiang province. High - pressure fresh water could be found in lower Pleistocene formation. This viewpoint has been verified by the drilling in 1990s. Afrer drilling, five high pressure water formations have been found in lower Pleistocene formation, of which 4 layers contains fresh water, thickness 60m, daily production 3000 ton, reserve about 38 × 10^8m^3. This research work is the first fresh water exploration under sea in the world, which is meaningful to improve the condition of fresh water supplying to the coast city or islands.
