The physical parameters of the subsurface from the environmental site investigation are important for geoscientists and engineers to understand and very low cost-effective method, especially when combined with geophys...The physical parameters of the subsurface from the environmental site investigation are important for geoscientists and engineers to understand and very low cost-effective method, especially when combined with geophysical (seismic) and geotechnical (borehole) surveys. These parameters can be estimated from other obtained parameters. In this study, P-wave velocities of materials (soils and rocks) are studied both in the laboratory and field measurement. The obtained P-wave velocities are then compared with the engineering parameters such N values, rock quality, friction angle, relative density, velocity index, density and penetration strength from boreholes. The empirical correlations were also found in this study for selected parameters. The estimation of engineering parameters from P-wave seismic velocity values is applicable for tropical environmental study. It is found that, the ratio (VFIELD/VLAB) when squared, was numerically close to the value of percentage RQD. We found that the empirical correlation for tropical environmental study is VP = 23.605(N) - 160.43 and the regression found is 0.9315 (93.15%). Meanwhile, the empirical correlation between P-wave velocities and RQD values is found as VP = 21.951(RQD) + 0.1368 and the regression found is 0.8377 (83.77%). The correlation between apparent P-wave velocities with penetration strength for both study sites are found as and the regression coefficient is found as 0.9756. Thus, this study helps for the estimation and prediction the properties of the subsurface material (soils and rocks) especially in reducing the cost of investigation and increase the understanding of the Earth’s subsurface characterizations physical parameters.展开更多
On December 8,2025,the international academic journal Nature released its“Nature’s 10:Ten people who helped shape science in 2025”list.Du Mengran,a geoscientist at the Institute of Deep-sea Science and Engineering(...On December 8,2025,the international academic journal Nature released its“Nature’s 10:Ten people who helped shape science in 2025”list.Du Mengran,a geoscientist at the Institute of Deep-sea Science and Engineering(IDSSE)under the Chinese Academy of Sciences,was named to the list.展开更多
Communication is a major barrier in using the results of environmental geoscience to inform public debate and policy.The results of an international survey of environmental geoscientists on communication issues are di...Communication is a major barrier in using the results of environmental geoscience to inform public debate and policy.The results of an international survey of environmental geoscientists on communication issues are discussed.The results suggest that environmental geoscientists recognize that communicating with media and public is important.They believe that their research is not too complex or difficult for the public to understand,and they generally feel well equipped to engage the public.Few of them,however,are trained in this area,and most are interested in taking courses to improve their skills.Their research is important in developing policy but often they find it challenging to communicate with policy makers and politicians.Thus their research is not always used effectively in developing policy.展开更多
Prof.Dr.Qiuming Cheng-A Profile IUGS President(2016-2020)During the president election,when asked the questions,“What is your background,where you are from,and which country are you representing?”,Qiuming’s ultimat...Prof.Dr.Qiuming Cheng-A Profile IUGS President(2016-2020)During the president election,when asked the questions,“What is your background,where you are from,and which country are you representing?”,Qiuming’s ultimate answers were that“I am a geoscientist with education backgrounds not only in geology,geochemistry,geophysics,but in geoinformatics and geomathematics.I am representing not only the continents of Asia,America,but the entire Earth,I am an‘Earthian’”.Qiuming sees the International Union of Geological Sciences(IUGS)as the largest global union in geosciences that covers the most comprehensive subjects of geosciences including geology,geochemistry,geophysics,geobiology and geomathematics,etc.As the president,one must represent the entire world and promote multidisciplinary geosciences.Qiuming has not only multidisciplinary education background in geosciences but also multicultural background from living and working in both China and in Canada for 25 years.展开更多
文摘The physical parameters of the subsurface from the environmental site investigation are important for geoscientists and engineers to understand and very low cost-effective method, especially when combined with geophysical (seismic) and geotechnical (borehole) surveys. These parameters can be estimated from other obtained parameters. In this study, P-wave velocities of materials (soils and rocks) are studied both in the laboratory and field measurement. The obtained P-wave velocities are then compared with the engineering parameters such N values, rock quality, friction angle, relative density, velocity index, density and penetration strength from boreholes. The empirical correlations were also found in this study for selected parameters. The estimation of engineering parameters from P-wave seismic velocity values is applicable for tropical environmental study. It is found that, the ratio (VFIELD/VLAB) when squared, was numerically close to the value of percentage RQD. We found that the empirical correlation for tropical environmental study is VP = 23.605(N) - 160.43 and the regression found is 0.9315 (93.15%). Meanwhile, the empirical correlation between P-wave velocities and RQD values is found as VP = 21.951(RQD) + 0.1368 and the regression found is 0.8377 (83.77%). The correlation between apparent P-wave velocities with penetration strength for both study sites are found as and the regression coefficient is found as 0.9756. Thus, this study helps for the estimation and prediction the properties of the subsurface material (soils and rocks) especially in reducing the cost of investigation and increase the understanding of the Earth’s subsurface characterizations physical parameters.
文摘On December 8,2025,the international academic journal Nature released its“Nature’s 10:Ten people who helped shape science in 2025”list.Du Mengran,a geoscientist at the Institute of Deep-sea Science and Engineering(IDSSE)under the Chinese Academy of Sciences,was named to the list.
文摘Communication is a major barrier in using the results of environmental geoscience to inform public debate and policy.The results of an international survey of environmental geoscientists on communication issues are discussed.The results suggest that environmental geoscientists recognize that communicating with media and public is important.They believe that their research is not too complex or difficult for the public to understand,and they generally feel well equipped to engage the public.Few of them,however,are trained in this area,and most are interested in taking courses to improve their skills.Their research is important in developing policy but often they find it challenging to communicate with policy makers and politicians.Thus their research is not always used effectively in developing policy.
文摘Prof.Dr.Qiuming Cheng-A Profile IUGS President(2016-2020)During the president election,when asked the questions,“What is your background,where you are from,and which country are you representing?”,Qiuming’s ultimate answers were that“I am a geoscientist with education backgrounds not only in geology,geochemistry,geophysics,but in geoinformatics and geomathematics.I am representing not only the continents of Asia,America,but the entire Earth,I am an‘Earthian’”.Qiuming sees the International Union of Geological Sciences(IUGS)as the largest global union in geosciences that covers the most comprehensive subjects of geosciences including geology,geochemistry,geophysics,geobiology and geomathematics,etc.As the president,one must represent the entire world and promote multidisciplinary geosciences.Qiuming has not only multidisciplinary education background in geosciences but also multicultural background from living and working in both China and in Canada for 25 years.
