Bathymetry for Six Lakes on Calvert and Hecate Islands - 2016 - British Columbia - Canada

10.21966/fcwf-p919

Bathymetric surveys were completed for six lakes on Calvert and Hecate Islands as part of the Kwakshua Watersheds Program. The surveys were conducted at different times from May to July 2016 using a canoe-mounted, location-aware depth sounder and by taking random manual depth measurements.

All depth recordings are referenced to a survey benchmark and have been quality controlled, cleaned and processed in a 3D GIS environment. For each lake, bathymetry has been modeled by means of a 1m Natural Neighbours raster generated from a Triangulated Irregular Network (TIN) using survey data. The high water mark is used as reference for full lake volume calculations. The lake outline has been manually digitized from high resolution orthophotos.

Bathymetry TIN models have been produced for each lake by using the manually digitized lake outlines as a “hard clip” interpolator of depth = 0, and using normalized (referenced on the vertical to a common benchmark) pre-processed and cleaned depth sounder and manual depth-reading survey data (depth) as mass points.

The surveyed lakes are the following: Major lake within watershed 708 on Calvert Island. Major lake within watershed 1015 on Hecate Island. A system of four interconnected lakes within watershed 693 on Calvert Island.

This dataset contains two layers of information: 1m depth contours for all lakes merged into the same layer to allow for symbolization and comparison of all lakes on the same vertical scale Surveyed lake outline polygons manually digitized from high resolution (25cm) orthophotos acquired in 2012.

All data processing has been undertaken using ESRI’s ArcGIS 10.3 platform (ArcMap and ArcScene).

Author Contributions: Santiago Gonzalez Arriola did all geospatial data processing and produced the final data and map products. Maartje Korver lead the the field data collection and initial data management. Wayne Jacob developed the depth sounder instrument and data logger. Ian Giesbrecht co-conceptualized the project with Suzanne Tank and Allison Oliver, and supervised implementation of field and geospatial aspects. Several members of the Hakai Geospatial Technologies team made important contributions, including Will McInnes, Matt Foster, Ray Brunsting and Keith Holmes.

For stage-volume tables, volume equations and further details on the methodologies employed in the survey and processing of the data please contact data@hakai.org

Suggested citation: Gonzalez Arriola, S., M. Korver, W. Jacob and I. Giesbrecht. 2016. Bathymetry for six lakes on Calvert and Hecate Islands, British Columbia. Hakai Institute Data Package. https://doi.org/10.21966/fcwf-p919

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Licence: Creative Commons Attribution 4.0
Limitations: Appropriate credit must be given to Hakai Institute and the authors of the dataset.

Data and Resources

Citation

Keywords

Dataset extent

Metadata Reference Date(s) March 29, 2022 (Publication)
July 24, 2024 (Revision)
Data Reference Date(s) August 10, 2016 (Publication)
Frequency of Update As Needed

Responsible Party 1
Name
Gonzalez Arriola, Santiago ORCID logo
Affiliation
Hakai Institute ROR logo
Email
santiago@hakai.org
Role
  • Author
  • Point of Contact
  • Processor
Responsible Party 2
Name
Korver, Maartje C. ORCID logo
Role
Author
Responsible Party 3
Name
Jacob, Wayne
Affiliation
Hakai Institute ROR logo
Email
wayne.jacob@hakai.org
Role
Author
Responsible Party 4
Name
Giesbrecht, Ian ORCID logo
Affiliation
Hakai Institute ROR logo
Email
ian.giesbrecht@hakai.org
Role
  • Author
  • Distributor
  • Owner
Responsible Party 5
Affiliation
Hakai Institute ROR logo
Email
data@hakai.org
Role
Publisher
Responsible Party 6
Name
Hakai Geospatial Technology Team
Affiliation
Hakai Institute ROR logo
Email
data@hakai.org
Role
  • Custodian
  • Point of Contact
  • Processor
Responsible Party 7
Affiliation
Tula Foundation ROR logo
Role
Funder

Field Value
Ocean Variables Other
Climate Variables Lakes
Scope Dataset
Status Completed
Topic Category oceans
Maintenance Note Generated from https://hakaiinstitute.github.io/hakai-metadata-entry-form#/en/hakai/qbqh6DF00XZq8MOpQ3kKkI9GUv43/-MWxuNHhkYXVuNlFDSVY
Spatial Extent { "coordinates": [ [ [ -128.09646606445312, 51.5996802644666 ], [ -127.9508972167969, 51.5996802644666 ], [ -127.9508972167969, 51.69171329024539 ], [ -128.09646606445312, 51.69171329024539 ], [ -128.09646606445312, 51.5996802644666 ] ] ], "type": "Polygon" }
North Bounding Latitude 51.69171329024539
South Bounding Latitude 51.5996802644666
East Bounding Longitude -127.9508972167969
West Bounding Longitude -128.09646606445312
Vertical Extent
Min
0.0
Max
0.0
Default Locale English
Citation identifier
Code
https://doi.org/10.21966/fcwf-p919
Projects
  1. Watersheds
  2. Geospatial
Included in Data Catalogue
Included in Data Catalogue 1
Name
Hakai Data Catalogue
Description
Science on the Coastal Margin
URL
https://catalogue.hakai.org