Trump Eases Pollution Controls on Streams and Wetlands

Trump Eases Pollution Controls on Streams and Wetlands

Photo: Farmland abutting prairie potholes, a type of ephemeral wetland, in North Dakota.Jim Brandenburg/Minden Pictures

WASHINGTON — The Trump administration on Thursday will finalize a rule to strip away environmental protections for streams, wetlands and other water bodies, handing a victory to farmers, fossil fuel producers and real estate developers who said Obama-era rules had shackled them with onerous and unnecessary burdens.

From Day 1 of his administration, President … [more…]

Great Lakes Scientist says, “If We Lose The EPA, We Lose Lake Erie”

Great Lakes Scientist says, “If We Lose The EPA, We Lose Lake Erie”

At the 8th Binational Meeting of the Lake Erie Millennium Network, 125 scientists gathered at the University of Windsor in Ontario to hear experts weigh-in on the health of the southernmost, warmest and shallowest of the Great Lakes.

They presented research on everything from climate change, water quality, phosphorous, agricultural run-off, cyanobacteria (blue-green algae), hypoxia (deficiency in oxygen), cladophora (green algae) to ice, invasive species, sediment concentrations, and much, much … [more…]

Double whammy killed coral reefs off Texas coast

Double whammy killed coral reefs off Texas coast

Photo: This colony of Spiny Flower Coral (Mussa angulosa) shows sections that are partially bleached, completely bleached, and even some dead sections already overgrown with algae. A bleached Fire Coral stands alongside. (Credit: Joyce & Frank Burek/NOAA Flower Garden Banks National Marine Sanctuary)

Researchers may have solved the mystery of what caused the death of the large and colorful reefs about 100 miles from the Galveston coast 3 years ago.

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Nitrates Before and After: This is what happened

Photo: confluence of rivers with nitrogen loads - This is what happened

Many people are curious about Iowa stream nitrate before modern agriculture became established across the landscape. They want to know what the “natural” level of nitrate was. It turns out we do have some actual data. In 1955, the Iowa Geological Survey published a document titled “Water-Supply Bulletin No. 5, Quality of Surface Waters of Iowa, 1886-1954” (1). Some of these data are shown below (as nitrogen).

Confluence of the … [more…]

Mathematician develops model to control spread of aquatic invasive species

Mathematician develops model to control spread of aquatic invasive species

Credit: University of Tennessee

Adjusting the water flow rate in a river can prevent invasive species from moving upstream and expanding their range. An applied mathematician at UT has developed a partial differential equation model to find the desired flow rate to reduce invasive populations.

The model is detailed in a new paper by Suzanne Lenhart, Chancellor’s Professor and James R. Cox Professor of Mathematics, published in Mathematics.

"Invasives

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