Parcels In and Near Floodplains:
Tacoma, WA
Figure 2
Figure 3
The purpose of this project was to identify flood-prone parcels in Tacoma, Washington. To complete this project, ArcGIS ModelBuilder was used to create a geospatial model.
Introduction
Figure 1
This model was designed to identify parcels in a given area that are located inside of a floodplain, and to identify a second set of parcels that are at risk of flood damage during extremely heavy rainfall. The model requires the input of two pieces of spatial data: 1) parcels with land use designation, and 2) floodplain polygons. The model also creates tables delineating the total number of parcels in a given land use designation that either intersect with a floodplain or are within a certain distance of the floodplain. The model appears in Figure 1.
Floodplains for Tacoma appear in Figure 2. These polygons were used in the geospatial model along with tax parcel polygons for Tacoma. A distance of 500 feet was used to identify parcels at risk of flooding during heavy rainfall. The results of this analysis appear in Figure 3. Finally, the number of residential parcels affected by flooding appear in Figure 4.
Method
Results
Figure 4
