Entries by Brett Walton

U.S., Mexican Scientists Collaborate on Border Aquifer Research

First-ever assessment program confirms boundaries of two shared aquifers. By Brett Walton, Circle of Blue Not only are they geographic features, the rivers that mark the U.S.-Mexico border are also cultural icons. In March 2014, when the Colorado River surged into its delta for the first time in decades, the riverside town of San Luis […]

Federal Water Tap, August 29: Odds of Colorado River Shortage Drop Slightly in New Forecast

The Rundown The lower Colorado River Basin is still looking at roughly a 50/50 chance of a shortage declaration as soon as 2018. A federal judge will soon decide whether to block construction of an oil pipeline that crosses the Missouri River. President Obama tours the Louisiana flood zone and designates a new national monument […]

Groundwater Shared by Countries Is Knowledge Void

Management of transboundary aquifers is on the United Nations agenda this fall. By Brett Walton, Circle of Blue The Mekong River Delta is under immense pressure. Upstream, a cascade of dams in China trap water and silt, the building blocks of delta life. Downstream, demand for irrigation water is rising in the world’s rice bowl. […]

Federal Water Tap, August 22: U.S. Geological Survey Creates Interactive Map of Dam Removal Science

The Rundown Researchers compile dam removal studies into an easy-to-use online portal. President Obama declares four Louisiana parishes federal disaster areas, while FEMA updates its flood management policy. NOAA unveils a high-power water forecasting model. A Department of Energy lab tests the “salmon cannon.” The Air Force replaces a firefighting foam that was contaminating groundwater. […]

Conservation Prevents Colorado River Shortage Declaration

Lake Mead forecast to remain above shortage trigger in 2017. By Brett Walton, Circle of Blue A resolute effort in Arizona, California, and Nevada to reduce Colorado River water use is slowing the decline of Lake Mead and delaying mandatory restrictions on water withdrawals from the drying basin. The Bureau of Reclamation, the federal agency […]

U.S. Hydropower Grows By Going Small

Hydropower expansion relies on improving existing dams. By Brett Walton, Circle of Blue Change is coming for the 90-year-old Point Marion Lock and Dam, change that could signal a new direction for America’s water and power infrastructure. More than a decade ago a steady flow of barges passed through Point Marion, on the Monongahela River […]

Federal Water Tap, August 15: U.S. Appeals Court Upholds Carbon Accounting Rules

The Rundown A federal appeals court affirms the Obama administration’s social cost of carbon guidance. EPA science advisory panel criticizes the agency’s fracking study. A mining company agrees to pay $US 143 million to prevent water contamination from a closed molybdenum mine in New Mexico while Congressional Republicans question the EPA about mining regulations. NASA […]

Federal Water Tap, August 8: Army Corps Approves River-Crossing Permit for Dakota Oil Pipeline

The Rundown Permit allows 1,100-mile oil pipeline to cross under the Missouri River. The White House puts climate change at the center of federal agency environmental planning while the world’s glaciers are on a long losing streak. A coal company pays a $US 3 million Clean Water Act fine. Watchdog agency tells Army Corps to […]

Colorado River’s Tale of Two Basins

Water diversions upstream increase risk in stressed watershed. By Brett Walton, Circle of Blue In Colorado, rivers flow not only down mountain slopes but beneath them, across them, and through them. Nearly four dozen canals, tunnels, and ditches in the state move water out of natural drainages and into neighboring basins. Some snake across high […]

Federal Water Tap, August 1: Energy Department Report Endorses U.S. Hydropower Growth

The Rundown The Energy Department identifies a path for more U.S. hydropower. The White House issues a cyberattack response plan. The EPA issues water quality recommendations to protect fish from copper and selenium, while the EPA’s internal watchdog delays an investigation into the Gold King mine spill. Federal agencies make “little progress” on a national […]

Federal Water Tap, July 25: Enbridge Agrees to $177 Million Settlement for Michigan Oil Spill

The Rundown Justice Department reaches deal over largest inland oil spill in U.S. history. EPA environmental justice council studies water affordability. The country experienced eight billion-dollar disasters in the first half of 2016. EPA approves new methods to test drinking water for contaminants while noting that many states are now doing more than federal rules […]

Israel’s Mediterranean Desalination Plants Shift Regional Water Balance

Desalination could remake the region’s politics and ecology. It hasn’t yet. By Brett Walton, Circle of Blue TEL AVIV, Israel — The water that flows into Sorek desalination plant is drawn from near the Mediterranean Sea floor. Pumped inland, the water is cleansed, step by step, of salts and impurities. The transmutation does not take […]