海底淡水资源赋存条件及舟山北部海域海底淡水资源研究

Study of the storage conditions of submarine freshwater resources and the submarine freshwater resources at north Zhoushan sea area

第四纪时期,中国近海气候为冰期和间冰期周期性交替出现,黄、东海陆架区海、陆相地层交替沉积。海底第四系淡水资源主要是赋存在近海相对比较封闭的古河道砂层地层环境中。利用舟山北部海域2009年完成的高分辨率单道地震测量成果,结合前人调查资料和邻近陆地地区的水文地质资料,对地震资料进行了解译和综合分析研究,初步圈定了早更新世时期的长江古河道和钱塘江古河道位置和海底淡水资源丰富区。这些研究成果为我国近海海域海底淡水资源开发提供了科学依据,为舟山北部海域海底淡水资源进一步调查指明了方向。

During Quaternary,the climate is characterized by alternate glacial and interglacial regularly in the China Seas.The sediments are mainly alternate terrigenous deposit and marine deposit in the continental shelf of the Yellow Sea and East China Sea.The submarine freshwater resources are mainly contained in the relative closed sandy layers of ancient channels.Based on the data from high-resolution single-channel seismic surveys in 2009,former investigation datum and neighboring terrestrial hydrogeological data,we interpreted,analyzed and studied all seismic data synthetically.Locations of the paleo-river channels of Yangtze River and Qiantangjiang River during the early Pleistocene were probed primarily.Advantaged areas of submarine freshwater resources were determined.All these lay scientific basis on submarine freshwater sources exploitation in offshore China Seas,and guide further investigation of submarine freshwater resources at north Zhoushan sea area.