Iowa River at Iowa City, IA (IOWI4) Flood Inundation Depth Rasters

Metadata:

Identification_Information:

Citation:

Citation_Information:

Originator: IIHR-Hydroscience & Engineering

Publication_Date: March/2010

Title: Iowa River at Iowa City, IA (IOWI4) - Flood Inundation Depth Rasters

elev_634_2, elev_634_7, elev_635_2, elev_635_7, elev_636_2, elev_636_7, elev_637_2, elev_637_7, elev_638_2, elev_638_7, elev_639_2, elev_639_7, elev_640_2, elev_640_7, elev_641_2, elev_641_7, elev_642_2, elev_642_7, elev_643_2, elev_643_7, elev_644_2, elev_644_7, elev_645_2, elev_645_7, elev_646_2, elev_646_7, elev_647_2, elev_647_7, elev_648_2, elev_648_7, elev_649_2, elev_649_7, elev_650_2, elev_650_7, elev_651_2

Geospatial_Data_Presentation_Form: raster digital data

Online_Linkage: www.iihr.uiowa.edu

Description:

Abstract:

These raster datasets show inundation depths (feet) along the Iowa River in Iowa City, IA. This information is to be displayed on the National Weather Service's (NWS's) Advanced Hydrologic Prediction Service (AHPS) website.

Purpose:

This data set was developed exclusively for use with the National Weather Service's (NWS) Advanced Hydrologic Prediction Service (AHPS) website.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: March/2010

Time_of_Day: unknown

Currentness_Reference: ground condition

Status:

Progress: Complete.

Maintenance_and_Update_Frequency:

IIHR-Hydroscience & Engineering/City of Iowa City have not determined a maintenance and update schedule for this dataset.

Spatial_Domain: NAD_1983_UTM_Zone_15N

Bounding_Coordinates:

West_Bounding_Coordinate: 618448.995854 meters

East_Bounding_Coordinate: 622602.803472 meters

North_Bounding_Coordinate: 4615449.225969 meters

South_Bounding_Coordinate: 4608976.742899 meters

Keywords:

Theme:

Theme_Keyword_Thesaurus:

floods, Iowa River, Coralville, flood inundation mapping, hydrologic prediction, hydraulics

Theme_Keyword: None named.

Access_Constraints: Free from restriction on use and distribution.

Use_Constraints:

Users must assume responsibility to determine the appropriate use of this data. Users should be aware of the limitations of this dataset if using for critical application.

Native_Data_Set_Environment:

Microsoft Windows Vista Enterprise Service Pack 2; ESRI ArcMap Build 1770

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report: The attributes in this dataset are believed to be accurate.

Logical_Consistency_Report:

These data are believed to be logically consistent, although not tested. Geometry appears topologically clean.

Completeness_Report:

Spatial and attribute properties are believed to be complete, although attribute information has been simplified. Geometric thresholds from original data are preserved. No tests have been completed for exhaustiveness.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. One dimensional Hydraulic modeling lacks the ability to account for flow velocities over the flood plain, which may result in variation of inundation.  Details of the process used to produce this data can be found in project documentation available from the data contact person. Topographic data was provided by the United States Geological Survey (USGS) and the cities of Iowa City and Coralville.  Ayres Associates collected and integrated topographic and aerial photogrammetric data.  

Vertical_Positional_Accuracy:

Vertical_Positional_Accuracy_Report:

As with any engineering analysis of this type, variation from the estimated flood heights and floodplain boundaries is possible. Details of the process used to produce this data can be found in project documentation available from the data contact person. Lineage:

Source_Information:

Source_Citation:

Citation_Information:

Title:

Flood Inundation Depth Rasters elev_634_2, elev_634_7, elev_635_2, elev_635_7, elev_636_2, elev_636_7, elev_637_2, elev_637_7, elev_638_2, elev_638_7, elev_639_2, elev_639_7, elev_640_2, elev_640_7, elev_641_2, elev_641_7, elev_642_2, elev_642_7, elev_643_2, elev_643_7, elev_644_2, elev_644_7, elev_645_2, elev_645_7, elev_646_2, elev_646_7, elev_647_2, elev_647_7, elev_648_2, elev_648_7, elev_649_2, elev_649_7, elev_650_2, elev_650_7, elev_651_20

Larger_Work_Citation:

Citation_Information:

Originator: IIHR-Hydroscience & Engineering

Title:

Flood Inundation Depth Rasters elev_634_2, elev_634_7, elev_635_2, elev_635_7, elev_636_2, elev_636_7, elev_637_2, elev_637_7, elev_638_2, elev_638_7, elev_639_2, elev_639_7, elev_640_2, elev_640_7, elev_641_2, elev_641_7, elev_642_2, elev_642_7, elev_643_2, elev_643_7, elev_644_2, elev_644_7, elev_645_2, elev_645_7, elev_646_2, elev_646_7, elev_647_2, elev_647_7, elev_648_2, elev_648_7, elev_649_2, elev_649_7, elev_650_2, elev_650_7, elev_651_2

Online_Linkage: <www.iihr.uiowa.edu>

Source_Scale_Denominator: IIHR-Hydroscience & Engineering

Type_of_Source_Media:

Source_Contribution:

Topographic data was provided by the United States Geological Survey (USGS) and the cities of Iowa City and Coralville.  Ayres Associates collected and integrated topographic and aerial photogrammetric data.   IIHR-Hydroscience & Engineering gathered bathymetric data using single and multibeam sonar.  Ayres Associates developed a validated one-dimensional Hec-Ras model used in generation of these data.

Process_Description:

IIHR-Hydroscience & Engineering used the Hec-Ras Model developed by Ayres Associates to generate several steady state simulations.  Each simulation was based on a discharge as determined by 0.5 foot river stage intervals of the rating curve at USGS River gage 05454500 Iowa River at Iowa City, IA.  The water surfaces were exported as TIN layers to ArcMap using Hec-GeoRas.  These TINs were intersected with a DEM of the area.  Areas of positive inundation depth (1 meter grid spatial resolution) were converted to vector format.  The 1 meter inundation depth grids were then converted to 5 meter grids to allow posting of the inundation depth datasets on the AHPS website.  The depth units are given in feet. 

 

Process_Date: 20090420

Process_Time: 09514700

Source_Produced_Citation_Abbreviation: <www.iihr.uiowa.edu>

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Raster

Raster_Object_Information:

Raster_Object_Type: Grid Cell

Row_Count: 1294

Column_Count: 831

Vertical_Count: 1

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: Transverse Mercator

Transverse_Mercator:

Scale_Factor_at_Central_Meridian: 0.999600

Longitude_of_Central_Meridian: -93.000000

Latitude_of_Projection_Origin: 00.000000

False_Easting: 500000.000

False_Northing: 0.000000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: row and column

Coordinate_Representation:

Abscissa_Resolution: 5.000000

Ordinate_Resolution: 5.000000

Planar_Distance_Units: meters

Geodetic_Model:

Horizontal_Datum_Name: North American Datum of 1983

Ellipsoid_Name: GRS_1980

Semi-major_Axis: 6378137.000000000000000000

Denominator_of_Flattening_Ratio: 298.257222101000020000

Distribution_Information:

Resource_Description: Downloadable Data

Standard_Order_Process:

Digital_Form:

Digital_Transfer_Information:

Metadata_Reference_Information:

Metadata_Date: 20100308

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: IIHR-Hydroscience & Engineering

Contact_Person: Dr. Nathan Young

Contact_Address:

Address_Type: mailing and physical address

Address: IIHR-Hydroscience & Engineering

                                    The University of Iowa

                                    100 C. Maxwell Stanley Hydraulics Laboratory

City: Iowa City

State_or_Province: Iowa

Postal_Code: 52242-1585

Country: USA

Contact_Voice_Telephone: (319) 335-5237

Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001-1998

Metadata_Time_Convention: local time

Metadata_Extensions:

Online_Linkage: <http://www.esri.com/metadata/esriprof80.html>

Profile_Name: ESRI Metadata Profile

version 1.0 on Mon March 3, 14:33:48 2010