City Texture Dashboard

As reported by NOAA, tropical cyclones have caused nearly $1 trillion in losses in the United States over the last four decades. Measures such as applying shutters, straps, and tie downs can mitigate a portion of these losses. This dashboard aims to answer what the value is for applying such mitigation measures.

The value of mitigation derives from estimates of avoidable losses. For hurricanes, these estimates are directly influenced by the magnitude and extent of expected wind loads. The maps below illustrate CSHub findings that capture how 'city texture'—the density and configuration of local buildings—affect wind loads and the derive value of mitigation along the Gulf and Atlantic coasts of the U.S.

In most instances, city texture generates greater wind loads than previously anticipated and, as a result, present significant opportunities for wider adaptation of hazard mitigation. Specifically, this analysis highlights more than $12 billion in mitigatable losses throughout the regions below.

Explore the dashboard to see the implications of city texture for the resilience planning of regions, states, and, perhaps, your own community.

 

 

How to interpret and use this dashboard:

This dashboard presents the results of a city texture analysis for the Atlantic and Gulf coasts of the U.S.

The Mitigation Benefits tab displays a map of the total and average benefits of applying mitigation measures such as shutters, straps, and tie downs. Below the maps, there are bar plots of the average losses for unmitigated versus mitigated homes, broken down by conventional wind loads and those that can be attributed to texture-related loss amplifications.

The City Texture tab displays a map of the local 95th percentile of drag coefficients estimated for census tracts and 5x5 km pixels. These drag coefficients are an output of the application of an empirical relationship between textural parameters and the intensity of wind loading. In this relationship, a drag coefficient of 2.0 represents the equivalent of a conventional approach. Anything higher indicates that texture effects amplify drag coefficients—and wind loads—beyond previous estimates. This, in turn, indicates the need for greater hazard mitigation for structures in these areas.

The maps in both tabs can be explored by state, county, and ZIP code. Additionally, the bar plots in the Mitigation Benefits tab can be viewed by occupancy type (e.g., single-family dwellings).

Produced by: Ipek Bensu Manav (bensu@mit.edu), Elizaveta Yugov, Mikayla Britsch, and Jacob Roxon, under the supervision of Randolph Kirchain, Jeremy Gregory, and Franz-Josef Ulm.