This 116-page report presents the results of an investigation by the Utah Geological Survey of land subsidence and earth fissures in Cedar Valley, Iron County, Utah. Basin-fill sediments of the Cedar Valley Aquifer contain a high percentage of fine-grained material susceptible to compaction upon dewatering. Groundwater discharge in excess of recharge (groundwater mining) has lowered the potentiometric surface in Cedar Valley as much as 114 feet since 1939. Groundwater mining has caused permanent compaction of fine-grained sediments of the Cedar Valley aquifer, which has caused the land surface to subside, and a minimum of 8.3 miles of earth fissures to form. Recently acquired interferometric synthetic aperture radar imagery shows that land subsidence has affected approximately 100 mi² in Cedar Valley, but a lack of accurate historical benchmark elevation data over much of the valley prevents its detailed quantification. Continued groundwater mining and resultant subsidence will likely cause existing fissures to lengthen and new fissures to form which may eventually impact developed areas in Cedar Valley. This report also includes possible aquifer management options to help mitigate subsidence and fissure formation, and recommended guidelines for conducting subsidence-related hazard investigations prior to development.

Achieving a sustainable, reliable drinking water supply has emerged in recent years as an increasingly important goal, not only in the United States but also worldwide. This is being driven by population growth, increasing water demands, declining groundwater levels, contamination of water sources, greater awareness of adverse environmental impacts, concern regarding the potential impacts of global warming, and many other factors. Among the many methods that are being applied to achieve this goal, managed aquifer recharge is proving to be viable and cost-effective. Recent advances in the science of aquifer recharge, including the geochemistry, microbiology, and hydraulics, provide a strong foundation for the successful implementation of aquifer recharge projects. However, to achieve success, it is necessary to understand the lessons learned, taking advantage of good ideas that worked and not repeating the ideas that did not work. The overall goal of this project was to identify technical variables that result in successful design, operation, and maintenance of sustainable underground storage (SUS) facilities. The key objectives of the project were to increase the available knowledge base of SUS facilities throughout the United States, survey a variety underground storage facilities, identify and evaluate sites where SUS performance failed to meet objectives, address the use of SUS to reduce the vulnerability of water facilities, and create an easy-to-use, practical guidance document and outreach program to distribute research findings. The final report discusses surface and well recharge methods and includes a concise summary of the most important lessons learned from the 22 operating and failed recharge sites that were visited. It also includes a proposed analytical approach that may be applied for water utilities to reduce their vulnerability to service interruption and thereby enhance their system reliability. The appendix includes case studies for the 18 operating and four failed SUS facilities that were visited as part of this project. These are presented on a CD, providing useful perspectives regarding how different water utility systems have approached the need for SUS.

The book represents a collection of papers presented at VI International Symposium "Biogenic - abiogenic interactions in natural and anthropogenic systems" that was held on 24-27 September 2018 in Saint Petersburg (Russia). Papers in this book cover a wide range of topics connecting with interactions between biogenic and abiogenic components in lithosphere, biosphere and technosphere. The main regarding topics are following: methods for studying the interactions between biogenic and abiogenic components; geochemistry of biogenic-abiogenic systems; biomineralization and nature-like materials and technologies; medical geology; biomineralogy and organic mineralogy; biomineral interactions in soil; biodeterioration of natural and artificial materials; biomineral interactions in extreme environment.

There comes a time in the affairs of every organization when we have to sit down and take stock of where we are and where we want to go. When the International Heat Flow Committee (as it was first called), IHFC, was formed in 1963 at the San Francisco International Union of Geodesy and Geophysics with Francis Birch as its first Chairman, the principal purpose was to stimulate work in the basic aspects of geothermics, particularly the measurement of terrestrial heat-flow density (HFD) in what were then the 'geothermally underdeveloped' areas of the world. In this, the IHFC was remarkably successful. By the beginning of the second decade of our existence, interest in the economic aspects of geothermics was increasing at a rapid pace and the IHFC served as a conduit for all aspects of geothermics and, moreover, became the group responsi ble for collecting data on all types of HFD measurements. In all the tasks that are undertaken, the IHFC relies on the enthusiasm of its members and colleagues who devote much of their time to the important but unglamorous and personally unrewarding tasks that were asked of them, and we arc fortunate that our parent institutions are usually quite tolerant of the time spent by their employees on IHFC work.