Systems and methods for flood risk assessment
First Claim
1. A computer-implemented method for predicting a flood elevation for a flood frequency for a property point, comprising:
- calculating with a processor at least two points of flood frequency versus flood elevation for the property point using a flood map;
defining a relationship between flood frequency and flood elevation for the property point using the at least two points; and
predicting with the processor at least one flood elevation at a flood frequency different from the flood frequency of one of the at least two points for the property point using the relationship;
wherein the flood map comprises a map of flood zones, defined by flood boundaries, and a plurality of pre-existing flood elevation lines;
wherein calculating with a processor at least two points of flood frequency versus flood elevation for the property point comprises;
geographically aligning the flood map with a digital elevation map; and
forming a substantially perpendicular line, on a digital elevation map, between the property point and a flood source line feature of a flood source in a same catchment area as the property point;
wherein the at least two points of flood frequency versus flood elevation for the property point are derived from geo-referenced discrete points, on the digital elevation map, for flood frequencies corresponding to a location on the flood source in a flood water surface profile that is on the substantially perpendicular line; and
wherein the flood water surface profile provides flood elevation for a flood source at given distances along the flood source;
wherein the defined relationship between flood frequency and flood elevation for the property point is a logarithmic relationship;
wherein the logarithmic relationship is defined by the equation;
Flood elevation=a Log(flood return period)+bwhere flood return period is 1/flood frequency, andwherein a and b are defined by solving the equation for the at least two calculated points.
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Accused Products
Abstract
In various embodiments, points from flood maps (e.g., geospatial flood risk zoning maps) may be used in generating a flood frequency versus flood elevation curve for reducing the uncertainty in the flood risk assessment. In some embodiments, geospatial flood elevation lines for flood elevation lines at different flood frequency levels may be defined based on elevation datasets where there are inconsistencies between the elevation datasets and flood maps that were generated. The flood frequency versus flood loss curve may be derived based on the computed flood frequency versus flood elevation curve, digital elevation datasets, and collected damage curve. In some embodiments, the flood risk rating may also be derived and a flood risk assessment report may be generated.
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Citations
20 Claims
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1. A computer-implemented method for predicting a flood elevation for a flood frequency for a property point, comprising:
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calculating with a processor at least two points of flood frequency versus flood elevation for the property point using a flood map; defining a relationship between flood frequency and flood elevation for the property point using the at least two points; and predicting with the processor at least one flood elevation at a flood frequency different from the flood frequency of one of the at least two points for the property point using the relationship; wherein the flood map comprises a map of flood zones, defined by flood boundaries, and a plurality of pre-existing flood elevation lines; wherein calculating with a processor at least two points of flood frequency versus flood elevation for the property point comprises; geographically aligning the flood map with a digital elevation map; and forming a substantially perpendicular line, on a digital elevation map, between the property point and a flood source line feature of a flood source in a same catchment area as the property point; wherein the at least two points of flood frequency versus flood elevation for the property point are derived from geo-referenced discrete points, on the digital elevation map, for flood frequencies corresponding to a location on the flood source in a flood water surface profile that is on the substantially perpendicular line; and wherein the flood water surface profile provides flood elevation for a flood source at given distances along the flood source; wherein the defined relationship between flood frequency and flood elevation for the property point is a logarithmic relationship; wherein the logarithmic relationship is defined by the equation;
Flood elevation=a Log(flood return period)+bwhere flood return period is 1/flood frequency, and wherein a and b are defined by solving the equation for the at least two calculated points. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A computer-implemented method for predicting a flood elevation for a flood frequency for a property point, comprising:
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calculating with a processor at least two points of flood frequency versus flood elevation for the property point using a flood map; defining a relationship between flood frequency and flood elevation for the property point using the at least two points; and predicting with the processor at least one flood elevation at a flood frequency different from the flood frequency of one of the at least two points for the property point using the relationship; wherein the flood map comprises a map of flood zones, defined by flood boundaries, and a plurality of pre-existing flood elevation lines, wherein calculating with a processor at least two points of flood frequency versus flood elevation for the property point comprises; geographically aligning the flood map with a digital elevation map; and forming a substantially perpendicular line, on a digital elevation map, between the property point and a flood source line feature of a flood source in a same catchment area as the property point; wherein the defined relationship between flood frequency and flood elevation for the property point is a logarithmic relationship, wherein the logarithmic relationship is defined by the equation;
Flood elevation=a Log(flood return period)+bwhere flood return period is 1/flood frequency, and wherein a and b are defined by solving the equation for the at least two calculated points, wherein two or more of the at least two points of flood frequency versus flood elevation for the property point are derived from elevation values on an intersection of two flood-frequency elevation surfaces and a cross-section surface that passes through the property point and is substantially perpendicular to a flood source line feature;
wherein the flood-frequency elevation surfaces are defined by respective elevation points of a water level during a flood at the respective frequency for the flood-frequency elevation surface.
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17. A system, comprising:
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a processor; a memory coupled to the processor and configured to store program instructions executable by the processor to; calculate at least two points of flood frequency versus flood elevation for the property point using a flood map; define a relationship between flood frequency and flood elevation for the property point using the at least two points; and predict at least one flood elevation at a flood frequency different from the flood frequency of one of the at least two points for the property point using the relationship; wherein the flood map comprises a map of flood zones, defined by flood boundaries, and a plurality of pre-existing flood elevation lines, wherein calculate at least two points of flood frequency versus flood elevation for the property point comprises; geographically aligning the flood map with a digital elevation map; and forming a substantially perpendicular line, on a digital elevation map, between the property point and a flood source line feature of a flood source in a same catchment area as the property point; wherein two or more of the at least two points of flood frequency versus flood elevation for the property point are derived from elevation values on an intersection of two flood-frequency elevation surfaces and a cross-section surface that passes through the property point and is substantially perpendicular to a flood source line feature;
wherein the flood-frequency elevation surfaces are defined by respective elevation points of a water level during a flood at the respective frequency for the flood-frequency elevation surface;wherein the defined relationship between flood frequency and flood elevation for the property point is a logarithmic relationship; wherein the logarithmic relationship is defined by the equation;
Flood elevation=a Log(flood return period)+bwhere flood return period is 1/flood frequency, and wherein a and b are defined by solving the equation for the at least two calculated points. - View Dependent Claims (18)
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19. A non-transitory computer-readable storage medium, comprising program instructions, wherein the program instructions are computer-executable to:
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calculate at least two points of flood frequency versus flood elevation for the property point using a flood map; define a relationship between flood frequency and flood elevation for the property point using the at least two points; and predict at least one flood elevation at a flood frequency different from the flood frequency of one of the at least two points for the property point using the relationship; wherein the flood map comprises a map of flood zones, defined by flood boundaries, and a plurality of pre-existing flood elevation lines; wherein calculate at least two points of flood frequency versus flood elevation for the property point comprises; geographically aligning the flood map with a digital elevation map; and forming a substantially perpendicular line, on a digital elevation map, between the property point and a flood source line feature of a flood source in a same catchment area as the property point; wherein two or more of the at least two points of flood frequency versus flood elevation for the property point are derived from elevation values on an intersection of two flood-frequency elevation surfaces and a cross-section surface that passes through the property point and is substantially perpendicular to a flood source line feature;
wherein the flood-frequency elevation surfaces are defined by respective elevation points of a water level during a flood at the respective frequency for the flood-frequency elevation surface;wherein the defined relationship between flood frequency and flood elevation for the property point is a logarithmic relationship; wherein the logarithmic relationship is defined by the equation;
Flood elevation=a Log(flood return period)+bwhere flood return period is 1/flood frequency, and wherein a and b are defined by solving the equation for the at least two calculated points. - View Dependent Claims (20)
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Specification