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表层岩溶带的岩溶动力学特征及其环境和资源意义 被引量:117
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作者 蒋忠诚 袁道先 《地球学报(中国地质科学院院报)》 CSCD 北大核心 1999年第3期302-308,共7页
表层岩溶带处于四大圈层的交汇带,碳- 水- 钙循环活跃,溶蚀和沉积化学反应都比较迅速,岩溶动力作用强烈而且对环境变化具有敏感性。表层岩溶带快速的岩溶过程以及对环境变化的敏感性,赋存大量短时间尺度的环境变化信息,可提高地... 表层岩溶带处于四大圈层的交汇带,碳- 水- 钙循环活跃,溶蚀和沉积化学反应都比较迅速,岩溶动力作用强烈而且对环境变化具有敏感性。表层岩溶带快速的岩溶过程以及对环境变化的敏感性,赋存大量短时间尺度的环境变化信息,可提高地质过程在全球环境变化研究的地位; 表层岩溶带碳- 水- 钙循环的活跃和与环境岩溶动力条件的相关性,使得表层岩溶带对环境 C O2 的变化具有调节作用,从而对碳循环的研究具有重要意义;表层岩溶带的发育使南方岩溶区具有浅层岩溶水循环与地下管道水循环耦合的二次岩溶水循环的结构特征,加强了岩溶水的调蓄作用,为开采深部岩溶水困难的峰丛山区的居民饮水提供了重要的水源。 展开更多
关键词 表层岩溶带 岩溶动力学 全球环境变化 岩溶水
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Temporal and spatial evolution of surface sediments characteristics in the Dagu River estuary and their dynamic response mechanism 被引量:5
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作者 Xiao-ying Chen Da-hai Liu +3 位作者 Ping Yin Jin-qing Liu Ke Cao Fei Gao 《China Geology》 2019年第3期325-332,共8页
Based on the 39 surface sediment samples collected in the flood season and the dry season in 2012 respectively and the measured hydrological data in October 2012, the sediment grain size characteristics has been analy... Based on the 39 surface sediment samples collected in the flood season and the dry season in 2012 respectively and the measured hydrological data in October 2012, the sediment grain size characteristics has been analyzed and the response mechanism of surface sediments to estuarine hydrodynamics was revealed by calculating the range of waves and tidal currents. The results show that:(1) The grain size of the surface sediment samples decreased gradually from land to sea in the flood season. The fine sediment was redistributed under marine hydrodynamics in the dry season and the sediments showed coarser tendency ingeneral;(2) tidal current stirring sediment was very obvious in Dagu River estuary area, and wave stirring sediments mainly occurred in the tidal flat area and estuary sand bar area;(3) in the flood season, surface sediment sat the estuary were transported towards south and southeast. In the dry season, surface sediments were transported towards southwest at the north area of Jiaozhou Bay Bridge, and sediments were transported towards northeast area at the south of Jiaozhou Bay Bridge. 展开更多
关键词 Dagu River ESTUARY Surface SEDIMENTS global climate and environmental change Water dynamics COASTAL zone GEOLOGICAL survey engineering Qingdao SHANDONG Province China
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