David Topping

2 months ago | mdpi.com | Gavin Shaddick |David Topping |T. C. Hales |Usama Kadri

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Feb 5, 2025 | mondaq.com | Sophie Gray |David Topping

The first two weeks of the second Trump Administration resultedin a series of Executive Orders that signal big changes in theExecutive Branch's approach to energy and environmental policy. These orders mark a significant shift in federal environmentalpriorities and are likely to have far-reaching effects. These recent orders reflect a distinct shift in federal energyand environmental policy, with potential implications for bothstate regulators, and private sector initiatives.

Oct 25, 2024 | mondaq.com | Sophie Gray |David Topping

North Carolina's Department of Environmental Quality (DEQ) has announced interim limits for eight per- and polyfluoroalkyl substances (PFAS) in groundwater. Although the agency is in the process of seeking approval for permanent PFAS groundwater standards, these temporary limits became effective on October 15 and will remain in effect for up to 12 months.

Oct 8, 2024 | pubs.usgs.gov | Paul E. Grams |David Topping |Gerard Salter |Katherine Chapman

Links More information: Publisher Index Page (via DOI) Download citation as: RIS | Dublin Core Study Area Publication type Article Publication Subtype Journal Article Title Implementation of controlled floods for sediment management on the Colorado River in Grand Canyon under aridification Series title River Research and Applications DOI 10.1002/rra.4374 Edition Online First Year Published 2024 Language English Publisher Wiley Contributing office(s) Southwest Biological Science Center Country...

Oct 2, 2024 | onlinelibrary.wiley.com | Paul E. Grams |David Topping |Gerard Salter |Katherine Chapman

1 Introduction After accumulating runoff from headwater streams in the Rocky Mountains of the western United States, the Colorado River traverses the arid plateaus and lowlands of the desert southwest (Figure 1). Along its course, water from the Colorado River is utilized for municipalities, industry, and agriculture through a network of dams, reservoirs, and diversions that move water within and outside of the Colorado River basin.