{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "A measure of the expected rate of spread of a potential fire.", "description": "

Characteristic Rate of Spread is the typical or representative rate of spread of a potential fire based on a weighted average of four percentile weather categories. Rate of spread is the speed with which a fire moves in a horizontal direction across the landscape, usually expressed in chains per hour (ch/hr) or feet per minute (ft/min). For purposes of the Colorado WRA, this measurement represents the maximum rate of spread of the fire front. Rate of Spread is used in the calculation of Wildfire Threat in the Colorado WRA. <\/SPAN><\/SPAN><\/P>

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Rate of spread is a fire behavior output, which is influenced by three environmental factors - fuels, weather, and topography. Weather is by far the most dynamic variable as it changes frequently. To account for this variability, four percentile weather categories were created from historical weather observations to represent low, moderate, high, and extreme weather days for each weather influence zone in Colorado. A weather influence zone is an area where, for analysis purposes, the weather on any given day is considered uniform. There are 11 weather influence zones in Colorado. <\/SPAN><\/SPAN><\/P>

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This output represents the weighted average for all four weather percentiles. <\/SPAN><\/SPAN><\/P>

The Characteristic Rate of Spread map is derived at a 30-meter resolution. This scale of data was chosen to be consistent with the accuracy of the primary surface fuels dataset used in the assessment. While not appropriate for site specific analysis, it is appropriate for regional, county or local planning efforts.<\/SPAN><\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "A measure of the expected rate of spread of a potential fire.", "title": "Characteristic Rate of Spread", "tags": [ "characteristic rate of spread", "rate of spread", "fire behavior", "Colorado Wildfire Risk Assessment", "CO-WRAP" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": "NaN", "maxScale": "NaN", "spatialReference": "", "accessInformation": "Colorado State Forest Service, Colorado Wildfire Risk Assessment Project 2012", "licenseInfo": "

The information contained herein is provided as a public service and is for NONCOMMERCIAL PURPOSES ONLY, with the understanding that the Colorado State Forest Service and Colorado State University make no warranties, either expressed or implied, concerning the accuracy, completeness, reliability, or suitability of the information. Nor does the Colorado State Forest Service or Colorado State University warrant that the use of this information is free of any claims of copyright infringement. THE INFORMATION IS BEING PROVIDED \"AS IS\" AND WITHOUT WARRANTY OF ANY KIND EITHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.<\/SPAN><\/SPAN><\/P>

Users also should note that property boundaries included in any product do not represent an on-the-ground survey suitable for legal, engineering, or surveying purposes. They represent only the approximate relative locations.<\/SPAN><\/SPAN><\/P>

By accessing this website and/or data contained within the databases, you hereby release the Board of Governors of the Colorado State University System, Colorado State University and the Colorado Sta<\/SPAN><\/SPAN>te Forest Service, their employees, agents, contractors, and suppliers (collectively, \u201cCSFS\u201d<\/SPAN><\/SPAN>) from any and all responsibility and liability associated with its use. In no event shall CSFS be liable for any damages arising in any way out of the use of the website, or use of the information contained in the databases herein including, but not limited to the Colorado Wildfire Risk Assessment products.<\/SPAN><\/SPAN><\/P>

The user assumes the entire risk related to their use of this information, including but not limited to the Colorado State Wildfire Risk Assessment and either the published or derived products from these data. IN NO EVENT WILL CSFS BE LIABLE TO YOU OR TO ANY THIRD PARTY FOR ANY DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, SPECIAL OR EXEMPLARY DAMAGES OR LOST PROFIT RESULTING FROM ANY USE OR MISUSE OF THESE DATA, EVEN IF THE USER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.<\/SPAN><\/SPAN><\/P>

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