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Service Description: <DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 11 0;"><SPAN>For wildfire risk and sea level rise, affects to the transportation network and the land uses were analyzed and zones stranded by the risk factor were identified. For extreme heat and flooding, only land use and demographic changes were considered in the scenario development. In addition to analyzing each risk factor independently, scenarios were also developed for the combination of all four risk factors together, including zones stranded only by the combination of wildfire and sea level rise. </SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>A GIS overlay approach was used in TransCAD with the SCAG travel demand model transportation network to identify the roadway links that would likely be impacted by the climate risk scenarios (sourced from the risk layers). The overlay procedure estimates one or more features by superimposing them over other features, and computes the extent to which the two overlap. For example: Wild Fire Risk polygon layer (red shaded portions in figure below) was overlaid on the transportation system roadway network layer and a selection was made to flag roadway links that are completely inside or touching the risk layer. These flagged links were examined by areas with satellite imagery in the background for reasonableness. The figure below shows the roadways impacted by the Wild Fire Risk (WFR) scenario. Red links are the transportation facilities that will be impacted and red dots are the zone centroids that are impacted by the WFR.</SPAN></P><P STYLE="margin:0 0 11 0;"><SPAN>Stranded zones analysis resulted in significant impacts to the wildfire scenario, but only minor impacts to the sea level rise scenario. The combination scenario included the same impacted links and stranded zones analysis, resulting not only in the sum total of stranded zones from wildfire and sea level rise, respectively, but also a handful of additional newly stranded zones. These zones, all in the Malibu area, are stranded only when pinched by the combination of wildfire risk and sea level rise simultaneously.</SPAN></P><P><SPAN /></P></DIV></DIV></DIV>
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Service Item Id: 53da470dc81f4c7c8f0b5f33d5f4d477
Copyright Text: Southern California Association of Governments (SCAG)
Cambridge Systematics, Inc.
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Title: C:\arcgisserver\directories\arcgisjobs\system\publishingtoolsex_gpserver\jc096cbacc8ef41d5ace7957c689f693d\scratch\A8325D3AD-103D-408B-A9E2-AECCA111C715.mxd
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Keywords: SCAG Model Stranded Zones Analysis,SCAG,Southern California,wildfire,wildfire risk,flood risk,100 year events,sea level rise,extreme heat,extreme heat health events,HHE,relocation,CoSMoS,FEMA,CHAT,CAL FIRE,FHSZ
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