Engineering
Top stories summarized by our editors
3/28/2017

China cites changing weather patterns and El Nino and La Nina events for record-high sea levels last year. The rising waters are said to raise the risk of storm tides, floods and coastal erosion, as well as seawater encroachment.

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El Nino, La Nina
3/28/2017

It was "Christmas in March" over the marshlands of Louisiana's Bayou Sauvage National Wildlife Refuge as National Guard helicopters dropped thousands of used Christmas trees. "The trees provide important habitat for waterfowl and fish, crab, crawfish and shrimp ... [and the measure] reverses shoreline erosion," said refuge manager Shelley Stiaes.

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National Guard
3/28/2017

Green infrastructure -- bioswales, permeable pavement, rain gardens and more -- can help reduce the overloading of sewer systems, and Washington, D.C.'s, Stormwater Retention Credit incentivizes property owners to use it.
The program also "provides flexibility in complying with stormwater standards issued to D.C. through the US Environmental Protection Agency's MS4 (Municipal Separate Storm Sewer System) permit," this article states.

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Ecosystem Marketplace
3/28/2017

Planting cover crops to take root before the cold months is one way Wisconsin farmers are fighting the runoff from manure used as fertilizer on their fields. But now federal funding that has helped foster the effort may be reduced.

3/28/2017

The Chesapeake Bay is benefiting from the use of Step Pool Conveyance Systems by several Maryland jurisdictions to slow stormwater runoff before it reaches the bay. The systems incorporate stair-stepped pools with cobble riffles between that allow water to seep into the ground while filter media and vegetation capture pollutants.

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stormwater runoff
3/28/2017

New Jersey's South Seaside Park section of Berkeley Township, noted for the dune system that saved it from Superstorm Sandy's floodwaters, is not yet included in the Army Corps of Engineers' beach replenishment plans. Area officials have not yet obtained the necessary access easements.

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Army Corps of Engineers
3/28/2017

Citing environmentalists' concerns over possible harm to air quality and wildlife habitat in Southern California's Hahamongna Watershed Park, a court has called a halt to a sediment-removal project behind Devil's Gate Dam. An environmental impact report on the project was deemed insufficient.

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KPCC-FM (Los Angeles)
3/28/2017

Eliminating the difficulties of solving the Hantush equation for transient flow was the goal of a study by Australia's Snowy Mountains Engineering. This paper explains how to do it and notes the approach also can be used to measure "feasibility of infiltrating water, attenuation zone, risk mitigation essential for decision-makers and planning regulators in terms of environmental effects and water use efficiency."

3/28/2017

Precision and preventive maintenance can help minimize the number of repairs that manufacturers must conduct, writes Stuart Grant, global maintenance and reliability champion at DuPont Sustainable Solutions. Grant contends that improving reliability in the workplace also improves employee safety and can help workers become more dedicated to maintaining reliable standards.

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IMPO magazine
3/28/2017

3D printing achieves a higher degree of accuracy with an electrospray technique that uses nanoparticles and solvents. The development at the State University of New York at Binghamton essentially builds on 2D print-to-print films, electrically controlling where each nanoparticle goes in a given layer.

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ASME.org