The Environmental Protection Agency’s (EPA) Science Advisory Board (SAB) released its final report assessing EPA’s recent study of potential impacts of hydraulic fracturing for oil and gas on drinking water resources.
The National Groundwater Association has announced that Peter G. McCornick, PhD, PE, D. WRE will give the keynote at NGWA’s Groundwater Week and the Irrigation Association’s 2016 Irrigation Show and Education Conference and is titled, Water for Food Security: Solutions for the Context. “Food and water security are two major interrelated challenges facing the world.
Background: Fresh water is an increasingly scarce resource in an increasingly populous and water-intensive world. Maintaining an adequate supply of fresh water both nationally and globally will be one of the largest challenges of the 21st century. Desalination of salty water – from both the ocean and the ground – represents a huge potential source of fresh water. The development of this resource requires a combination of geoscience, engineering, waste management, policy, and community outreach and participation.
Our speakers are:
Tzahi Cath, Ph.D., Ben L. Fryrear Professor, Department of Civil & Environmental Engineering, Colorado School of Mines | SlidesVideo
Katherine R. Zodrow, Ph.D., Assistant Professor, Environmental Engineering, Montana Tech of the University of Montana; Non-Resident Scholar, Center for Energy Studies, James A. Baker III Institute, Rice University | SlidesVideo
Corrosive groundwater, if untreated, can dissolve lead and other metals from pipes and other components in water distribution systems. Two indicators of potential corrosivity—the Langelier Saturation Index (LSI) and the Potential to Promote Galvanic Corrosion (PPGC)—were used to identify which areas in the United States might be more susceptible to elevated concentrations of metals in household drinking water and which areas might be less susceptible. On the basis of the LSI, about one-third of the samples collected from about 21,000 groundwater sites are classified as potentially corrosive. On the basis of the PPGC, about two-thirds of the samples collected from about 27,000 groundwater sites are classified as moderate PPGC, and about one-tenth as high PPGC. Potentially corrosive groundwater occurs in all 50 states and the District of Columbia.
Roughly 60 percent of global groundwater use is for irrigation. Most of the rest is used in households and industry. Groundwater uses vary significantly by country, and partly depend on climate. In some countries with abundant rainfall, such as Indonesia and Thailand, irrigation needs are very low, so household water supply is the main use for groundwater.