الصفحة 1
الصفحة 1
Mud and Mudstones : Introduction and Overview
Our book provides the first elementary overview of mud and mudstone written for a broad spectrum of professionals, teachers and students in geology, petroleum geology and engineering, urban planning and development, paleontology and paleoecology, and architecture and archaeology. Mud and mudstone provide the foundations to master all their aspects and prepares you to dig deeply into the many fascinating questions of their origin, relationships to earth history and practical uses. Key topics include the production of mud, its transport, the important role of bottom oxygen, sites of deposition, burial, provenance, mudstones in basins and an overview of practical uses followed by an appendix and extended glossary.
Environmental History of the Rhine-Meuse Delta : An ecological story on evolving human–environmental relations coping with climate change and sea-level rise
This book presents the environmental history of the Delta of the lowland rivers Rhine and Meuse, an ecological story on evolving human–environmental relations coping with climate change and sea-level rise. It offers a combination of in-depth ecology and environmental history, dealing with exploitation of land and water, the use of everything nature provided, the development of fisheries and agriculture, changes in biodiversity of higher plants, fish, birds, mammals and invasive exotics. It is the first comprehensive book written in English on the integrated environmental history of the Delta, from prehistoric times up to the present day. It covers the l- acy of human intervention, the inescapable fate of reclaimed, nevertheless subs- ing and sinking polders, ‘bathtubs’ attacked by numerous floods, reclaimed in the Middle Ages and unwittingly exposed to the rising sea level and the increasing amplitude between high and low water in the rivers. The river channels, constricted and regulated between embankments, lost their flood plains, silted up, degraded and incised. Cultivation of raised bog deposits led to oxidation and compacting of peat and clay, resulting in progressive subsidence and flooding; arable land had to be changed into grassland and wetland. For millennia muscular strength and wind and water powers moulded the country into its basic form. From 1800 onwards, acceleration and scaling up by steam power and electricity, and exponential popu- tion growth, resulted in the erection of human structures ‘fixed forever’, and severe pressure on the environment.
Dynamics of Freezing-Thawing Soil around Subway Shield Tunnels
Addresses development laws for axial strain and excess pore water pressure in silty clay around subway shield tunnels before and after freezing-thawing when subjected to subway loading, as well as the effect of freezing-thawing on the dynamic parameters of silty clay, including the dynamic modulus and damping ratio, introducing readers to the design and construction of bypasses in subway tunnels with the artificial freezing method. On this basis, it then studies the microstructures of silty clay before and after freezing-thawing cyclic loading by means of scanning electron microscope tests and mercury intrusion porosimetry tests. Lastly, the book presents a numerical simulation of the dynamics of silty clay around subway tunnels before and after thawing.
