Journal of Tropical Oceanography ›› 2010, Vol. 29 ›› Issue (1): 104-110.doi: 10.11978/j.issn.1009-5470.2010.01.104cstr: 32234.14.j.issn.1009-5470.2010.01.104

• Marine geology • Previous Articles     Next Articles

Hazardous geology and its relationship with environmental evolution in the Pearl River Estuary

SUN Jie1, ZHAN Wen-huan1, JIA Jian-ye2, QIU Xue-lin1   

  1. 1.CAS Key Laboratory of Marginal Sea Geology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China; 2. Guangdong Technical College of Water Resource and Electric Engineering, Guangzhou 510610, China
  • Received:2008-11-27 Revised:2009-02-10 Online:2010-01-15 Published:2001-01-08

Abstract:

The geological environments in the Pearl River Estuary are comparatively complicated and pregnant with hazardous geology factors. High-resolution seismic data, satellite remote sensing, borehole data and systematic survey have been used to examine marine hazardous geologic types and their distributions in the Pearl River Estuary; hazardous geologic maps of the estuary have been completed. The geological hazards are classified into neotectonic, erosive-deposit, fluid-plastic and heterogeneous hazardous geology types, including active fault, earthquake, coastal erosion, coastal accumulation, sand wave, tidal sand ridge, buried paleochannel, shallow gas, erosion gutter, shallow bedrock, among others. The scale of distribution of hazardous geologic types is large; the types of hazardous geology are complex and distributed in almost the whole area. Geologic environmental evolution including neotectonic movement and sea-level change since late Pleistocene decides the formation and regularity of geologic hazards. More attentions should be given to severe hazardous geologic phenomena that can greatly threaten regional economic development and engineering construction.

Key words:  hazardous geology factors, distribution, geologic environmental, evolution, Pearl River Estuary