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This data was created to support Phase II of the Virginia CRMP. The CRMP and its products are designed to be a trusted resource to assist government entities in making evidence-based decisions using high-quality flood resilience data. CRMP hazard data represents the best available information related to coastal Virginia’s major flood hazard sources and should be used to inform local and regional flood resilience planning and decision-making. |
| summary:
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This data was created to support Phase II of the Virginia CRMP. The CRMP and its products are designed to be a trusted resource to assist government entities in making evidence-based decisions using high-quality flood resilience data. CRMP hazard data represents the best available information related to coastal Virginia’s major flood hazard sources and should be used to inform local and regional flood resilience planning and decision-making. |
| extent:
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[[-78.2002776877951,36.4714339955466],[-75.0784435472233,39.3867495868543]] |
| accessInformation:
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This dataset was created by the Virginia Department of Conservation and Recreation (DCR) in 2024. DCR will review and make appropriate adjustments to this data with each update of the CRMP. |
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thumbnail/thumbnail.JPEG |
| maxScale:
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5000.0 |
| typeKeywords:
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["ArcGIS","ArcGIS Server","Data","Map Service","Service"] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><P><SPAN>Virginia Coastal Resilience Master Plan (CRMP) Combined Flood Hazard Flood Dominance for 1% Annual Exceedance Probability (AEP) event in the Baseline planning scenario.</SPAN></P><P><SPAN>This dataset depicts the geographic area likely to be inundated by a major (1% AEP) flood event resulting from any of the three independent flood sources: coastal, rainfall-driven, and riverine. Areas within this 1% AEP extent have a 1-in-100 chance, or greater, of experiencing flooding in any given year, based on statistical analysis and modeling of historical events. Data is classified and colored to represent the flood hazard source that has the greatest depth in a 1% AEP flood event for each 10-foot cell in the CRMP study area. </SPAN></P><P><SPAN>This dataset contains information for the baseline planning scenario, meaning it is based on historical, observed data and does not incorporate anticipated future conditions. This data is suitable for understanding current conditions (2020) and can serve as a basis for comparison with future conditions.</SPAN></P><P><SPAN>This combined flood hazard information draws leverages data from multiple sources, including CRMP 2022 coastal flood modeling, 2024 rainfall-driven flood modeling, and riverine flood data from the Federal Emergency Management Agency (FEMA). Complete documentation of the source data and production process for coastal flooding can be found in the VA CRMP Phase I Appendix C – Coastal Flood Hazard Framework Report (Dewberry, 2022). For rainfall-driven flooding, the documentation is provided in the Pluvial Modeling Final Report (Dewberry, 2024, Addendum A).</SPAN></P><P><SPAN>Related resources include the VA CRMP Master Plan report (https://www.dcr.virginia.gov/crmp/) and Coastal Resilience Web Explorer (https://www.dcr.virginia.gov/crmp/cr-web-explorer). </SPAN></P><P><SPAN>For questions or additional information, please contact Flood.Resilience@dcr.virginia.gov.</SPAN></P></DIV></DIV> |
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<DIV STYLE="text-align:Left;"><P><SPAN>The analysis is based on the best available models and datasets when the data were created. </SPAN></P><P><SPAN>Flood hazard models are simplified representations of complex and interconnected natural and manmade systems. Users should note that the following factors are not included in the flood hazard models: stormwater infrastructure, narrow floodwalls, compound flooding, erosion, and groundwater levels.</SPAN></P></DIV> |
| catalogPath:
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| title:
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Combined Flood Hazard 1% AEP Dominance, Baseline Scenario |
| type:
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Map Service |
| url:
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| tags:
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["Flooding","Flood Hazard","Coastal Resilience","Virginia","DCR","CRMP","Climate Change","Future Conditions","Combined Hazard","Flood Hazard Dominance","1% AEP","Baseline","Present"] |
| culture:
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en-US |
| portalUrl:
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|
| name:
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Combined_Dominance_Baseline |
| guid:
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4B29CC42-7E82-47D4-8E5B-320A521841D7 |
| minScale:
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1.5E8 |
| spatialReference:
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WGS_1984_Web_Mercator_Auxiliary_Sphere |