摘要
沿岸某些人为地质灾害与沉积层的性质有关。我国沿岸沉积层的特征和分布依赖于河流输沙。注入构造沉降带的多为大河,其输沙量占入海河流输沙量的90％以上,且颗粒较细,形成厚层第四纪泥质沉积层。注入隆起带的河流其输沙量少于10％,且以沙砾为主,形成沙砾层。依据我国沿岸沉积层的分布格局,可以预测某些人为地质灾害。
Some geological hazards caused by human activities are closely related to the nature of sedimentary strata in the coastal zones of China. Their characteristics and distribution depend on the river sediments. The rivers discharging into coastal zones of subsidence belts contribute more than 90% of the total suspended load, so thick and fine-grained strata are formed. The river sediments transported into the coastal zones of uplift belts is less than 10% of the total, and the strata consists of sand and gravel. Eased on the pattern of sedimentary strata in the coastal zones of China, above mentioned giological hazards can be predicted: the coastal zones in subsidence belts will be the areas of development of potential land subsidence, diapirism, underwater landslide etc; the coastal zones in uplift belts are characterized by potential salt water intrusion.
出处
《海洋科学》
CAS
CSCD
北大核心
1992年第1期54-56,共3页
Marine Sciences
