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Energy Solutions

Building for Reduced Flood Risk

Siting, design, and materials choices can all mitigate risk where flooding is a danger

洪水周围的洪水比该地区任何人预期的任何人都高得多 - 比在生活记忆中的任何时候都要高。This photo, taken after flood waters came down by several feet, shows the main road in an area where flowing water is never seen.
Image Credit: Tristan Roberts
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洪水周围的洪水比该地区任何人预期的任何人都高得多 - 比在生活记忆中的任何时候都要高。This photo, taken after flood waters came down by several feet, shows the main road in an area where flowing water is never seen.
Image Credit: Tristan Roberts
Whoever sited this home may have known something, or they may have had a lucky touch. While 600 homes in Vermont were lost to Irene, the small rise in this yard was enough to protect the first floor of the house from being inundated, even as the basement was flooded and the outdoor wood boiler was undermined.
Image Credit: Tristan Roberts
While the adjoining house did fine, a solid foundation under this garage was no match for a roaring river outside of its banks.
Image Credit: Tristan Roberts
Flat Street in downtown Brattleboro was flooded by the Irene-swollen Whetstone Brook. Some buildings fared fine — raised off the ground by smart sitework, or in one case, even while surrounded by water, a building had no water inside due to floodgates at exterior doors.
Image Credit: Rob Prohaska
A wide variety of hardware is available for increasing resistance to strong wind. These products from Simpson Strong-Tie extend the load path in wood-frame construction, helping prevent uplift.
Image Credit: Simpson Strong-Tie

在两个小时内会发生很多变化。周日上午8点,我在佛蒙特州南部的半英里车道上行走,检查了前一天的涵洞和水棒。都好。我们车道旁边的溪流肆虐,但留在其银行内。绿河在整个城镇道路上也是如此。

At 10 a.m., I got a call from my neighbor that my other neighbor’s house was flooding and they’d had to get out. Going back down the driveway with the hope of helping them, I found that the brook had grown to 10 times its usual width, filling the valley that this tranquil little brook usually meanders through. The Green River had done the same, covering the road and making it impossible to get anywhere. Friends who had been excited about rafting the swollen rivers canceled their plans after watching whole trees float by, and hearing boulders roll through the river.

在邻居的家中,洪水幅度严重受到严重破坏,但道路被严重冲走。对于与艾琳飓风相连的东北部洪水影响的每个人,我的心向您倾诉。当我一直与邻居一起适应这些事件时,我一直希望为其他所有人做同样的事情。如您所知,这将是一项长期的努力。

Global weirding could bring more floods …

根据这些事件,我们考虑了我们的建筑环境,我们必须考虑气候变化的现实。有些人更喜欢将“全球变暖”称为“全球怪异”,因为我们的气候是一个复杂的系统,各种奇怪的风暴和天气模式可能会爆发。这不仅仅是略高于平均水平的线性骑行。

As water temperatures rise in the South Atlantic, tropical storm systems will pick up more energy, resulting in higher-magnitude hurricanes on the Gulf Coast and Eastern seaboard. Elsewhere, changing precipitation patterns are expected to deliver more rainfall in intense storms that could result in river flooding.

…而开发使我们的景观降低了吸收性

建筑师唐·沃森(Don Watson)说,使事情变得复杂,开发使我们的景观吸收了降雨,他正在写一本关于“弹性设计”的书。沃森说:“我们夺走了景观的所有吸收能力。”适应气候变化将需要使我们的建筑物对暴风雨和洪水更具弹性。从长远来看,我们需要为海平面上升和恢复土地吸收水的能力做准备。

While it may be cold (and wet) comfort to owners and residents in damaged buildings, here are some tips for adapting to increased flooding, adapted from “Design for Adaptation: Living in a Climate-Changing World,“ 一个Environmental Building Newsarticle by Alex Wilson and Andrea Ward.

Expand capacity with natural systems

Avoid building in flood zones.洪水区域扩张——通常比revi快sions to zoning regulations, meaning that simply following the law relative to the siting of buildings may not be enough. Instead of designing to 100-year floods, consider designing to 500-year floods, seeking civil engineering or surveyor assistance as needed.

Expand stormwater management capacity and rely on natural systems.More intense storms will strain the capacity of standard stormwater management infrastructure in some areas. Provide larger stormwater conveyance and detention basins, and try to rely on natural features, constructed wetlands, and other ecologically based systems to manage stormwater. “Restore the ecological services of the landscape,” says Watson.

Design to survive extreme winds

Design buildings to survive extreme winds.为建筑物赋予良好风能的特定措施的示例包括:

  • 安装耐电线窗口(符合Miami-Dade协议PA 201,PA 202和PA 203)或外部百叶窗;
  • installing outward-opening doors that are less likely to be pushed inward in intense wind;
  • designing walls to resist uplift using hurricane strapping and other metal fasteners that provide a continuous load path from foundation to roof;
  • anchoring walls properly to foundations or frost walls;
  • 设计墙壁以使用工程墙壁支撑或剪切面板来抵抗剪切和侧向力,以墙壁墙壁,并适当使用重杆作为砖石墙;
  • 设计屋顶几何(例如髋关节屋顶),比山墙屋顶易于造成风能伤害;安装连续的屋顶衬里;
  • 适当安装高强度的屋顶护套(例如5'8”胶合板),可以抵抗隆起;和
  • specifying roofing that has been tested to ASTM standards for wind resistance.

将建筑物从地面上抬起。在容易洪水的地区(即使只有洪水泛滥),在洪水泛滥的情况下,将建筑物或居住空间提升到地面以上,以最大程度地减少损害。在任何类型的码头基础上,请格外小心,以确保能量性能和气密性不会受到损害;众所周知,凸起的地板很难隔离和密封。

Specify materials and components to survive flooding

Specify materials that can survive flooding.Especially in locations where flooding or hurricane damage is likely, use materials that can get wet and then dry out with minimal damage. Such materials include preservative-treated sills and wood framing, fiberglass-faced rather than paper-faced drywall, and tile or resilient flooring rather than carpeting.

保护建筑安装专门的组件s from flooding or allow flooding with minimal damage.易受洪水泛滥区域的码头基础上的脱离墙板可以使洪水在不破坏房屋的情况下通过房屋下方。洪水通风孔(基础墙中的永久开口)使洪水能够逃脱。在某些情况下,专门的洪水障碍,包括可移动的入口障碍,可以使洪水不断上升。

提升机械和电气设备。从洪水中降低损坏和危险,将机械设备,电气板和其他设备提升到相当预期的洪水水平以上。即使整个建筑物无法将其提升到这样的水平,也可以将设备提升为具有成本效益。

Please share below your flood survival stories and thoughts on adapting to global weirding!

Tristan Roberts is Editorial Director atBuildingGreen, Inc., in Brattleboro, Vermont, which publishes information on green building solutions.

一条评论

  1. GBA编辑
    Martin Holladay||#1

    佛蒙特州洪水破坏
    Tristan,
    下图显示了佛蒙特州罗切斯特的一所房子,该房屋受到热带风暴艾琳(Irene)的洪水的破坏(照片来源:Lars Gange,Mansfield Heliflight)。

    A good collection of similarly amazing photos can be found here:http://www.mansfieldheliflight.com/flood/

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