Hydrogeology and Simulation of Groundwater Flow and Land-Surface Subsidence in the Northern Part of the Gulf Coast Aquifer System, Texas, 1891?2009

Hydrogeology and Simulation of Groundwater Flow and Land-Surface Subsidence in the Northern Part of the Gulf Coast Aquifer System, Texas, 1891?2009

Author: U.S. Department of the Interior

Publisher: Createspace Independent Pub

ISBN: 1499701748

Category: Nature

Page: 68

View: 532

In cooperation with the Harris–Galveston Subsidence District, Fort Bend Subsidence District, and Lone Star Groundwater Conservation District, the U.S. Geological Survey developed and calibrated the Houston Area Groundwater Model (HAGM), which simulates groundwater flow and land-surface subsidence in the northern part of the Gulf Coast aquifer system in Texas from predevelopment (before 1891) through 2009. Withdrawal of groundwater since development of the aquifer system has resulted in potentiometric surface (hydraulic head, or head) declines in the Gulf Coast aquifer system and land-surface subsidence (primarily in the Houston area) from depressurization and compaction of clay layers interbedded in the aquifer sediments.

The Texas Landscape Project

The Texas Landscape Project

Author: David A. Todd

Publisher: Texas A&M University Press

ISBN: 9781623493721

Category: Nature

Page: 516

View: 798

The Texas Landscape Project explores conservation and ecology in Texas by presenting a highly visual and deeply researched view of the widespread changes that have affected the state as its population and economy have boomed and as Texans have worked ever harder to safeguard its bountiful but limited natural resources. Covering the entire state, from Pineywoods bottomlands and Panhandle playas to Hill Country springs and Big Bend canyons, the project examines a host of familiar and not so familiar environmental issues. A companion volume to The Texas Legacy Project, this book tracks specific environmental changes that have occurred in Texas using more than 300 color maps, expertly crafted by cartographer Jonathan Ogren, and over 100 photographs that coalesce to fashion a broad portrait of the modern Texas landscape. The rich data, compiled by author David Todd, are presented in clearly written yet marvelously detailed text that gives historical context and contemporary statistics for environmental trends connected to the land, water, air, energy, and built world of the second-largest and second-most populated state in the nation. An engaging read for any environmentalist or conscientious citizen, The Texas Landscape Project provides a true sense of the grand scope of the Lone Star State and the high stakes of protecting it. To learn more about The Meadows Center for Water and the Environment, sponsors of this book's series, please click here.

Applied Groundwater Modeling

Applied Groundwater Modeling

Author: Mary P. Anderson

Publisher: Academic Press

ISBN: 9780080916385

Category: Technology & Engineering

Page: 630

View: 860

This second edition is extensively revised throughout with expanded discussion of modeling fundamentals and coverage of advances in model calibration and uncertainty analysis that are revolutionizing the science of groundwater modeling. The text is intended for undergraduate and graduate level courses in applied groundwater modeling and as a comprehensive reference for environmental consultants and scientists/engineers in industry and governmental agencies. Explains how to formulate a conceptual model of a groundwater system and translate it into a numerical model Demonstrates how modeling concepts, including boundary conditions, are implemented in two groundwater flow codes-- MODFLOW (for finite differences) and FEFLOW (for finite elements) Discusses particle tracking methods and codes for flowpath analysis and advective transport of contaminants Summarizes parameter estimation and uncertainty analysis approaches using the code PEST to illustrate how concepts are implemented Discusses modeling ethics and preparation of the modeling report Includes Boxes that amplify and supplement topics covered in the text Each chapter presents lists of common modeling errors and problem sets that illustrate concepts

Submarine Groundwater

Submarine Groundwater

Author: Igor S. Zektser

Publisher: CRC Press

ISBN: 9781420005257

Category: Science

Page: 466

View: 838

Sustainable management of water resources is quickly increasing in importance on a global scale. An important piece of the puzzle is the characterization of marine water and determining its importance to geochemical budgets. To do this, submarine groundwater discharges must be carefully studied. Comprehensively exploring the subject, Submarine G

Understanding the Long-Term Evolution of the Coupled Natural-Human Coastal System

Understanding the Long-Term Evolution of the Coupled Natural-Human Coastal System

Author: National Academies of Sciences, Engineering, and Medicine

Publisher: National Academies Press

ISBN: 9780309475846

Category: Science

Page: 157

View: 929

The U.S. Gulf Coast provides a valuable setting to study deeply connected natural and human interactions and feedbacks that have led to a complex, interconnected coastal system. The physical landscape in the region has changed significantly due to broad-scale, long-term processes such as coastal subsidence and river sediment deposition as well as short-term episodic events such as hurricanes. Modifications from human activities, including building levees and canals and constructing buildings and roads, have left their own imprint on the natural landscape. This coupled natural-human coastal system and the individual aspects within it (physical, ecological, and human) are under increased pressure from accelerating environmental stressors such as sea level rise, intensifying hurricanes, and continued population increase with its accompanying coastal development. Promoting the resilience and maintaining the habitability of the Gulf Coast into the future will need improved understanding of the coupled natural-human coastal system, as well as effective sharing of this understanding in support of decision-making and policies. Understanding the Long-term Evolution of the Coupled Natural-Human Coastal System presents a research agenda meant to enable a better understanding of the multiple and interconnected factors that influence long-term processes along the Gulf Coast. This report identifies scientific and technical gaps in understanding the interactions and feedbacks between human and natural processes, defines essential components of a research and development program in response to the identified gaps, and develops priorities for critical areas of research.

Energy Production in the Mississippi River Delta

Energy Production in the Mississippi River Delta

Author: J. W. Day

Publisher: Springer Nature

ISBN: 9783030945268

Category: Cogeneration of electric power and heat

Page: 250

View: 725

For nearly a century, the energy industry had a profound impact on the Mississippi Delta, including both the natural and socio-economic systems. The purpose of this book is to describe the delta, how oil and gas (O&G) activities have impacted both natural and socio-economic systems and how much degradation could have been avoided. The Mississippi Delta formed over the past six thousand years but, in less than a century, lost 25 percent of coastal wetlands. O&G activities contributed significantly to this loss. O&G production began in the early 20th century and over 600 conventional fields were developed. Production ramped up rapidly, peaking around 1970, then declined. As O&G production declines, produced water dominates fluid production, and this high salinity brine is laced with a variety of toxins. Often, O&G was produced rapidly and much was left in the ground and is now technically and economically unavailable. With careful planning, this situation could have been avoided. The industry also affected the regulatory framework by weakening regulations, enforcement and impacts were not adequately addressed, and more profits flowed out of state. Thus, the state was economically and environmentally worse off. The industry should be compelled to contribute expertise and financial resources to restoration of the delta. .