Mapper
Level of Effort:
The USGS Compound Flooding map is an interactive tool developed by the U.S. Geological Survey’s New York Water Science Center that helps users explore the combined risk of multiple flooding drivers across the New York and Long Island coastal region, including Long Island Sound watersheds. Compound flooding refers to flooding that happens when more than one type of water hazard occurs at the same time for example, heavy rainfall, high tides or storm surge, and rising groundwater which can lead to more severe and widespread inundation than from any single cause alone. This type of flooding is increasingly relevant as sea level rise and intense storms interact with land and groundwater conditions.
The map visually displays hazard rankings and spatial patterns of flood drivers so that planners, emergency managers, researchers, and the public can better understand where overlapping flood risks are most significant. It supports local decision making for flood mitigation, coastal planning, and resilience strategies by showing how precipitation, coastal flooding, and groundwater emergence can coincide to create elevated threat levels. The site is grounded in ongoing USGS research into regional flood processes and compound flood hazards, with data useful for watershed planning, infrastructure assessment, and risk communication
Mapper
Level of Effort:
The USGS Compound Flooding map is an interactive tool developed by the U.S. Geological Survey’s New York Water Science Center that helps users explore the combined risk of multiple flooding drivers across the New York and Long Island coastal region, including Long Island Sound watersheds. Compound flooding refers to flooding that happens when more than one type of water hazard occurs at the same time for example, heavy rainfall, high tides or storm surge, and rising groundwater which can lead to more severe and widespread inundation than from any single cause alone. This type of flooding is increasingly relevant as sea level rise and intense storms interact with land and groundwater conditions.
The map visually displays hazard rankings and spatial patterns of flood drivers so that planners, emergency managers, researchers, and the public can better understand where overlapping flood risks are most significant. It supports local decision making for flood mitigation, coastal planning, and resilience strategies by showing how precipitation, coastal flooding, and groundwater emergence can coincide to create elevated threat levels. The site is grounded in ongoing USGS research into regional flood processes and compound flood hazards, with data useful for watershed planning, infrastructure assessment, and risk communication
Mapper
Level of Effort:
The NYC Flood Hazard Mapper is an interactive tool created by the NYC Department of City Planning to help residents, businesses, and planners understand flood risks across New York City. It provides maps showing current coastal flood hazards, FEMA flood zones, and areas that may be affected by sea level rise in the future. By searching an address or exploring different map layers, users can see how flooding may impact specific neighborhoods today and under future climate conditions.
This resource is designed to support safer decision making as the frequency and severity of flooding increases. While the mapper offers valuable visual data and projections, it is meant for general information only and should not replace official FEMA resources or professional guidance. Users are encouraged to use this tool as a starting point to learn about local flood exposure and to explore how environmental changes may affect communities throughout the city.
Mapper
Level of Effort:
The NYC Flood Hazard Mapper is an interactive tool created by the NYC Department of City Planning to help residents, businesses, and planners understand flood risks across New York City. It provides maps showing current coastal flood hazards, FEMA flood zones, and areas that may be affected by sea level rise in the future. By searching an address or exploring different map layers, users can see how flooding may impact specific neighborhoods today and under future climate conditions.
This resource is designed to support safer decision making as the frequency and severity of flooding increases. While the mapper offers valuable visual data and projections, it is meant for general information only and should not replace official FEMA resources or professional guidance. Users are encouraged to use this tool as a starting point to learn about local flood exposure and to explore how environmental changes may affect communities throughout the city.
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