Lake Basin Littoral Zone

<b>Observed:</b> Polygons showing the estimated littoral zone of a lake. The littoral depth was derived from a table of maximum vegetation depths as recorded during individual Lake Surveys.<br/><br/><b>15 Foot Standard:</b> Shows the DNR Fisheries calculated littoral zone based on a standard 15 foot depth contour. All lake areas 0-15 feet in depth are considered to be littoral zone. This definition is based historically on the maximum depth of light penetration to the lake bottom for plant growth (although the actual depth of light penetration varies by lake due to water clarity).

Additional Info

Field Value
Last Updated March 15, 2019, 10:03
Created November 26, 2014, 09:01
dsAccessConst None
dsCurrentRef Time Period of Content date indicates the date which the user can be confident of accuracy and completeness of the dataset. Littoral zone estimates are derived from existing Lake Bathymetry products (i.e., DEMs, contour lines and values of observed maximum depth of vegetation). Lake bathymetric contour lines and DEMs are derived from existing lake contour maps of variable dates. (See <i>Quick Layers:Hydrography:Lake Bathymetric Outline</i> for field work dates of individual lakes.) Values for maximum depth of vegetation come from transect observations recorded during individual Lake Surveys (various dates). Vegetation depth values were used to estimate lake littoral zone.
dsModifiedDate 2019-03-15 01:20:59
dsOriginator Minnesota Department of Natural Resources (DNR)
dsPeriodOfContent 11/13/2014
dsPurpose This data was developed to assist in resource management and research applications by furthering the basic understanding of the littoral zone of a lake. Littoral area has implications for available habitat, spawning sites, productivity, oxygen levels, and erosion/sedimentation dynamics.

Dataset extent