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Posts Tagged ‘water retention’

THE RISING TIDEWATER

BY BRETT ANDERSON / PHOTOGRAPHY BY SAHAR COSTON-HARDY

Disparate but urgent efforts to address sea-level rise in the Virginia Tidewater, one of the country’s most important strategic centers, are striving to keep up with visible realities.

FROM THE DECEMBER 2017 ISSUE OF LANDSCAPE ARCHITECTURE MAGAZINE.

The first question that sprang to Ann C. Phillips’s mind soon after she moved to Norfolk, Virginia, in 2006 was, “Why, when it rains, does the whole place submerge?”

She wasn’t referring only to dramatic weather events, although Phillips, a retired rear admiral in the U.S. Navy, landed in Norfolk during a bumper crop of those: Norfolk saw more major coastal storms and hurricanes in the 2000s than in the four previous decades combined, according to the city government.

Harder to fathom were the floods caused by light rains and “blue sky floods” triggered by lunar tides. Tidal flooding affects low-lying areas of Norfolk nine times per year on average.

These more regular floods were unlike anything Phillips experienced growing up in Annapolis, Maryland. They’re an alarmingly routine part of life in Norfolk and the surrounding Hampton Roads area (more…)

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BY TIMOTHY A. SCHULER

Milwaukee pilots a new stormwater management tool.

Milwaukee pilots a new stormwater management tool.

From the July 2015 issue of Landscape Architecture Magazine.

By August, the faded yellow house at 3930 North 35th Street in Milwaukee will be gone. In its place, invisible to all but the team that designed it, will be a new tool for stormwater management: the “BaseTern.” Conceived by Erick Shambarger, the deputy director of Milwaukee’s Office of Environmental Sustainability, a BaseTern is a basement that’s been converted into a rainwater or stormwater cistern. Milwaukee is completing what is said to be the world’s first such system this month.

The BaseTern concept, which Shambarger trademarked, is simple. Stormwater will be directed to an abandoned or foreclosed property’s basement, which, after the aboveground structure is demolished, is waterproofed and filled with gravel and stormwater-harvesting cells. According to a feasibility study by engineers at HNTB, the system can hold anywhere from 13,000 to 40,000 gallons of water during storms, reducing flooding in adjacent homes.

It’s a clever riff on adaptive reuse, taking advantage of one urban issue—a surplus of city-owned foreclosures—to solve another: the flooding that is increasingly common in dense, impervious neighborhoods like Milwaukee’s Sherman Park, where the pilot project is located.

(more…)

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