Digital Flood Hazard Mapping


Identification Information:
Citation:
Citation Information:
Originator: River Forecast Section, Alberta Environment and Parks, Government of Alberta
Publication Date: 20150622
Title: Digital Flood Hazard Mapping
Geospatial Data Presentation Form: vector digital data
Publication Information:
Publication Place: Edmonton, Alberta
Publisher: River Forecast Section, Alberta Environment and Parks, Government of Alberta
Online Linkage: http://maps.srd.alberta.ca/FloodHazard/viewer.ashx?viewer=Mapping
Description:
Abstract: Alberta Flood Hazard Mapping GIS Data Archive - AB_FHM_GIS_DATA_20150622.ZIP IMPORTANT! The Digital Flood Hazard Mapping data was updated on 2015-06-22. The previous dataset dated 2013-08-09 should be discarded and replaced with the 2015-06-22 dataset. This digital data may not reflect official flood hazard areas delineated in original hardcopy mapping produced under the Flood Hazard Identification Program. Contact the River Forecast Section for clarification if the precise flood hazard extent or a design flood level is critical to any application. This digital data archive is updated when new information is available or existing information changes, and the currency of its flood hazard mapping assets are not guaranteed. Refer to the Supplemental Information section of this document for important information regarding data and conversion processes. IMPORTANT! Alberta Environment and Parks identifies flood hazard areas across the province as part the Flood Hazard Identification Program. Studies commissioned as part of the program are comprised of reports and mapping. Flood hazard mapping delineates areas that would be inundated during the 100-year design flood under encroached conditions and provides design flood levels along study cross sections. The flood hazard area is divided into floodway and flood fringe components to support appropriate flood hazard area management. The floodway area is that portion of the river channel and floodplain required to convey the 100-year design flood. The floodway is where flood flows are deepest, fastest and most destructive. New development is discouraged in the floodway and may not be permitted in some communities. The flood fringe is the area outside of the floodway that will still be flooded during the design event, and may include overland flow areas. The water in the flood fringe is generally less than one metre deep and flows more slowly. Development in the flood fringe may be permitted provided that its adequately floodproofed to accommodate design flood elevations and any required freeboard. The current design flood standard in Alberta is the 100-year flood, determined when a flood hazard study is undertaken. A 100-year flood is defined as a flood whose magnitude has a one percent chance of being equalled or exceeded in any year. The design flood can also reflect a computed 100-year water level resulting from an ice jam or be based on a historical flood event. Design flood levels are water elevations within a flood hazard area computed to result from a design flood under encroachment conditions. Encroachment conditions assume a future scenario where the flood fringe is fully developed and flood flows are conveyed entirely within the floodway. Design flood levels should not change as a result of development or obstruction of flows within the flood fringe. More information on the Flood Hazard Identification Program can be found at http://aep.alberta.ca/water/programs-and-services/flood-hazard-identification-program/flood-hazard-studies/default.aspx. The website includes synopses and background information for all official Alberta Environment and Parks flood hazard studies. Official flood hazard mapping for communities across Alberta is available online using the Flood Hazard Map Application at http://maps.srd.alberta.ca/FloodHazard/viewer.ashx?viewer=Mapping. The application uses GIS technology to display mapped areas, including cross section locations and design flood levels along with links to specific study pages. Flood hazards have not been identified in all communities and may exist in areas without official flood hazard mapping produced under the provincial Flood Hazard Identification Program. Contact the River Forecast Section for additional information.
Purpose: Flood hazard mapping is created to increase public safety and awareness of flood hazards, and to be used as a planning tool by all levels of government and the public to mitigate future flood damages.
Supplemental Information: Data Notes It should be noted that the Digital Flood Hazard Mapping data may be represented as multipart polygons (i.e. there may be only one record in the database associated with more than one polygon). Multipart polygons may be exploded into single part polygons if required. AB_FHM_GIS_DATA_20150622.ZIP - Alberta Flood Hazard Mapping GIS Data Archive This archive includes five ESRI GIS shapefiles that together comprise the Alberta digital flood hazard mapping dataset. 1) AB_FHM_CROSS_SECTIONS_20150622.SHP Contains linework showing the locations of river cross sections used in flood hazard mapping analyses (when available or appropriate to the study) and includes design flood elevations at those cross sections as an attribute. 2) AB_FHM_FLOODWAY_20150622.SHP Contains polygon data delineating floodway zones within flood hazard areas. 3) AB_FHM_FLOOD_FRINGE_20150622.SHP Contains polygon data delineating flood fringe zones within flood hazard areas. 4) AB_FHM_OVERLAND_FLOW_20150622.SHP Contains polygon data delineating areas affected by overland flow (flood fringe) within flood hazard areas, if such areas have been identified. These areas are considered a special case of the flood fringe. 5) AB_FHM_UNDER_REVIEW_20150622.SHP Contains polygon data delineating areas associated with potential or known flood hazard, but where final data is currently under review. Conversion Notes The geographic CSRS98 NAD83 coordinate system and datum were chosen as the reference system for all Alberta flood hazard mapping data, in order to retain accuracy and precision regardless of the systems used in individual flood hazard studies. Appropriate transformation grids should be used when converting between the CSRS98 geographic system and the Mercator-based projected coordinate systems commonly used in Alberta (3TM, UTM and 10TM) or between NAD27 and NAD83 datums. Conversion is a one-step process with NAD83 data: NAD83(Original) <-> NAD83(CSRS98). Conversion is a two-step process with NAD27 data, with separate conversions between coordinate system and datums: NAD27(Original) <-> NAD83(Original) <-> NAD83(CSRS98). 1) NTV2_O.GSB (known in Alberta as NTV2_0.DAC) is the transformation grid to go between NAD27(Original) and NAD83(Original). 2) ABCSRSV4.GSB (known in Alberta as ABCSRSV4.DAC) is the most current transformation grid to go between NAD83(Original) and NAD83(CSRS98).
Language of Dataset: en
Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: 20150622
Time of Day: unknown
Currentness Reference: publication date
Status:
Progress: Complete
Maintenance and Update Frequency: As needed
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -121.00000000
East Bounding Coordinate: -109.00000000
North Bounding Coordinate: 61.00000000
South Bounding Coordinate: 48.00000000
Keywords:
Theme:
Theme Keyword Thesaurus: ISO 19115 Topic Category
Theme Keyword: inlandWaters
Theme Keyword: environment
Theme Keyword: elevation
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: flood hazard
Theme Keyword: flood hazard identification program
Theme Keyword: flood hazard studies
Theme Keyword: flood hazard mapping
Theme Keyword: floodway
Theme Keyword: flood fringe
Place:
Place Keyword Thesaurus: Alberta Geographic Names (GNS)
Place Keyword: Alberta
Place:
Place Keyword Thesaurus: none
Place Keyword: Northern Hemisphere
Place Keyword: Western Hemisphere
Place Keyword: Mid-latitude
Place Keyword: North America
Place Keyword: Canada
Place Keyword: Alberta
Access Constraints: General Public: For conditional general public use. User must accept terms and conditions in a product license agreement before obtaining data. Government of Alberta Ministries: Conditional access to this data for internal business purposes is available to Government of Alberta Ministries and authorized agencies through Informatics Branch of Alberta Environment and Parks.
Use Constraints: General Public: This digital data is protected under copyright to the Government of Alberta with all rights reserved and is subject to the conditions outlined in the Informatics Branch License Agreement for Digital Data. Government of Alberta Ministries: Government of Alberta Ministries and authorized agencies may conditionally use this data for internal business purposes which includes conditional sharing of the data with other third parties (i.e. contractors, stakeholders) if necessary for reasonable use of the data relating to the provision of services to the Crown as represented by each Ministry.
Point of Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Environment and Parks, Government of Alberta
Contact Address:
Address Type: mailing and physical address
Address: 11th floor, Oxbridge Place
Address: 9820 - 106 Street NW
City: Edmonton
State or Province: Alberta
Postal Code: T5K 2J6
Country: Canada
Contact Voice Telephone: 7804276280
Contact Facsimile Telephone: 7804220262
Contact Electronic Mail Address: AEP.Flood@gov.ab.ca
Hours: 0815 to 1630, Monday to Friday
Contact Instructions: Contact the River Forecast Section for additional information and clarification. 7804276280 (voice) 7804220262 (fax) AEP.Flood@gov.ab.ca
Security Information:
Security Classification System: Government of Alberta Data and Information Security Classification
Security Classification: Protected A
Native Data Set Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.3500
Data Quality Information:
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report: Digital Flood Hazard Mapping
Quantitative Horizontal Positional Accuracy Assessment:
Horizontal Positional Accuracy Value: N/A
Horizontal Positional Accuracy Explanation: The horizontal accuracy of this digital data is inconsistent. Accuracy of any particular flood hazard mapping element is dependent on the accuracy of the original hardcopy mapping and the methodology used to create a digital representation of the mapping. Contact the River Forecast Section for clarification if the precise flood hazard extent or a design flood level is critical to any application.
Vertical Positional Accuracy:
Vertical Positional Accuracy Report: Digital Flood Hazard Mapping
Quantitative Vertical Positional Accuracy Assessment:
Vertical Positional Accuracy Value: N/A
Vertical Positional Accuracy Explanation: The vertical accuracy of this digital data is inconsistent. Accuracy of any particular flood hazard mapping element is dependent on the accuracy of the original hardcopy mapping and the methodology used to create a digital representation of the mapping. Contact the River Forecast Section for clarification if the precise flood hazard extent or a design flood level is critical to any application.
Lineage:
Source Information:
Source Citation:
Citation Information:
Originator: River Forecast Section, Alberta Environment and Parks, Government of Alberta
Publication Date: Unknown
Title: Supplementary Information
Publication Information:
Publication Place: Edmonton, Alberta
Publisher: River Forecast Section, Alberta Environment and Parks, Government of Alberta
Source Scale Denominator: Variable
Type of Source Media: Variable
Source Time Period of Content:
Time Period Information:
Single Date/Time:
Calendar Date: unknown
Time of Day: unknown
Source Currentness Reference: publication date
Source Citation Abbreviation: Supplementary Datasets
Source Contribution: Flood hazard mapping is produced in association with flood hazard studies and is typically based on aerial photography, channel survey data, digital terrain models and design flood levels. Design flood levels are typically computed using hydraulic computer models which require channel and overbank geometry, hydraulic roughness estimates and design flow data as inputs and typically use historical highwater marks for calibration.
Process Step:
Process Description: The accuracy of any particular flood hazard mapping element is dependent on the accuracy of the original hardcopy mapping and the methodology used to create a digital representation of that mapping. Different digitization and geo-referencing strategies have been used with varying levels of success, depending on the nature and quality of the original hardcopy mapping. Limited historical documentation of this process is available, and unknown discrepancies may exist between the versions. New flood hazard mapping is typically created in a digital environment, and may not have similar issues.
Process Date: Unknown
Process Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: River Forecast Section, Alberta Environment and Parks, Government of Alberta
Contact Address:
Address Type: mailing and physical address
Address: 11th floor, Oxbridge Place
Address: 9820 - 106 Street NW
City: Edmonton
State or Province: Alberta
Postal Code: T5K 2J6
Country: Canada
Contact Voice Telephone: 7804276280
Contact Facsimile Telephone: 7804220262
Contact Electronic Mail Address: AEP.Flood@gov.ab.ca
Hours: 0815 to 1630, Monday to Friday
Spatial Data Organization Information:
Direct Spatial Reference Method: Vector
Point and Vector Object Information:
SDTS Terms Description:
SDTS Point and Vector Object Type: G-polygon
Point and Vector Object Count: 2
Spatial Reference Information:
Horizontal Coordinate System Definition:
Geographic:
Latitude Resolution: 0.000000
Longitude Resolution: 0.000000
Geographic Coordinate Units: Decimal degrees
Geodetic Model:
Horizontal Datum Name: D_North_American_1983_CSRS
Ellipsoid Name: Geodetic Reference System 80
Semi-major Axis: 6378137.000000
Denominator of Flattening Ratio: 298.257222
Distribution Information:
Distributor:
Contact Information:
Contact Organization Primary:
Contact Organization: Alberta Environment and Parks, Government of Alberta
Contact Position: Data Distribution Unit, Information and Data Provisioning Services, Informatics Branch, Corporate Services Division
Contact Address:
Address Type: mailing address
Address: 14th Floor Oxbridge Place
Address: 9820 - 106 Street NW
City: Edmonton
State or Province: Alberta
Postal Code: T5K2J6
Country: Canada
Contact Voice Telephone: 7804277374
Contact Facsimile Telephone: 7804220712
Contact Electronic Mail Address: AEP.Data@gov.ab.ca
Hours: 0815 to 1630 Monday to Friday
Contact Instructions: This is the point of contact regarding distribution of the data set. Queries about distribution of the data set submitted through facsimile or electronic mail must include the salutation "Attention: Data Distribution Unit, Information and Data Provisioning Services, Informatics Branch, Corporate Services Division; Dataset: Digital Flood Hazard Mapping".
Resource Description: Live Data and Maps
Distribution Liability: The user agrees that the information and each part thereof, any formatting or presentation thereof, any storage media on which it is provided, and any communication of any kind, incidental or in relation thereto, is provided to the user by the Minister and the Crown without warranty or representation as to any matter including but not limited to whether the information and storage media is correct, accurate or free from error, defect, danger, or hazard, and whether it is otherwise useful or suitable for any use the user may make of it. The Crown in right of Alberta, the Minister and her employees and agents, shall not be liable for any claims, costs, losses, or damages, including any special, indirect, incidental or consequential loss or damage, which the user may incur or experience as a result of the use or possession of the information or associated storage media.
Standard Order Process:
Digital Form:
Digital Transfer Information:
Format Name: ESRI Shapefile
File Decompression Technique: File compression technology shall be utilized when required.
Digital Transfer Option:
Online Option:
Access Instructions: FTP (File Transfer Protocol) is available, with the exception of data exceeding reasonable size limits or when corporate restrictions have been implemented in which the data will be delivered using alternate methods. Instructions on how to download data placed on our FTP site will be communicated when the data is ready for delivery.
Fees: Fee Free
Ordering Instructions: All requests for data / information are accepted via email, FAX, or Canada Post. All requests must include: Government of Alberta Ministry Name / Business Area Name, Physical Address, Contact Person Name(s), Phone and FAX Numbers, email Address, list of products requested, the geographic extent of the request (where product options are available - expressed by NTS block(s), township(s), etc), the delivery option required ( on-line / offline ), the data format when multiple formats are offered, and the intended use of the data.
Turnaround: Requests for information are processed and completed in order of receipt with the exception of Alberta Environment and Parks requests that have been authorized as priority status. All requests for information are completed within five (5) working days of receiving the request wherever possible.
Custom Order Process: Limited custom order processing of Informatics Branch information may be available to Alberta Environment and Parks personnel and contractors working on behalf of the Ministry.
Technical Prerequisites: To utilize digital information, specialized software may be required. Digital information requires specialized graphics or GIS software (i.e. ArcInfo, ArcView, ArcGIS, or MicroStation).
Available Time Period:
Time Period Information:
Single Date/Time:
Calendar Date: Monday to Friday
Time of Day: 08:15 to 16:30
Metadata Reference Information:
Metadata Date: 20150622
Metadata Contact:
Contact Information:
Contact Organization Primary:
Contact Organization: River Forecast Section, Alberta Environment and Parks, Government of Alberta
Contact Address:
Address Type: mailing and physical address
Address: 11th floor, Oxbridge Place
Address: 9820 - 106 Street NW
City: Edmonton
State or Province: Alberta
Postal Code: T5K 2J6
Country: Canada
Contact Voice Telephone: 7804276280
Contact Facsimile Telephone: 7804200262
Contact Electronic Mail Address: AEP.Flood@gov.ab.ca
Hours: 0815 to 1630, Monday to Friday
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
Language of Metadata: en

ESRI Metadata

Modification Date: 20150611
Modification Time: 10351600
Creation Date: 20150709
Creation Time: 15545100
Synchronize Once: TRUE
Metadata ID: {311CA2B8-66FE-4409-B5FF-C77F3AC09EF1}
Published Document ID: {41C92445-1244-4985-99F8-CEE0C090B839}
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