Folder Water Levels

pdf Combating Invasive Species in the Les Cheneaux Watershed_Great Lakes Coastal Resilience Planning Guide

Combating Invasive Species in the Les Cheneaux Watershed

Author: Bridget Faust

Author Affiliation: Association of State Floodplain Managers

Journal: Great Lakes Coastal Resilience Planning Guide; February 14, 2014; May 2016 updates appear in the “Awareness” and “Strategy” sections of the case study

Abstract: The objective of this paper is to demonstrate how low water levels and invasive species have adversely impacted the Les Cheneaux Watershed, describe the different strategies used by the community to combat them, and provide communities with the decision support tools necessary to decide when and how to manage invasive species.

pdf Georgian Bay Casebook of Low Water Impact, comprehensive 2012-2013

The harms caused by Low Water Levels in Georgian Bay 2012-2013

Authors:  Mayors and leaders from around Georgian Bay

Author Affiliation: Georgian Bay communities

Journal: Georgian Bay Case Book; March 7, 2013

Abstract: The impact of declining water levels on the Great Lakes has been studied by many Georgian Bay groups over the past decade. These studies have assembled significant amounts of scientific fact, proposed a number of underlying causes and considered possible solutions. This international process continues and it is hoped will eventually develop a course of action to better manage the water in the Great Lakes.

pdf IJC 2017 Draft Report: Great Lakes Water Quality

IJC 2017 Draft Report: Great Lakes Water Quality

Authors: The International Joint Commission (IJC) (individual authors unnamed)

Author Affiliation: The International Joint Commission (IJC)

Journal: The International Joint Commission Pursuant to Article 7 (1) (k) of the 2012 Great Lakes Water Quality Agreement; January, 2017

Abstract: The IJC has developed this draft triennial assessment report, informed by a larger staff developed technical appendix that includes fuller analyses, technical information, discussion of relevant science and references. This report and the staff technical appendix report will be revised after consideration of comments received from the public.
The final report will be submitted to the Parties and will also be useful to other levels of government, nonprofit environmental organizations, and all citizens who care about the well-being of the lakes.

To comment on the report, use this the IJC link:

pdf Phosphorus and phytoplankton dynamics in the Les Cheneaux Islands during a rapid rise in Lake Huron water level

Phosphorus and phytoplankton dynamics in the Les Cheneaux Islands during a rapid rise in Lake Huron water level

Authors: R. A. Smith

Author Affiliation: LCWC

Journal: Unpublished Report; March 2017

Abstract: Nutrient concentration and algal biomass dynamics are reported for multiple sites throughout the Les Cheneaux Islands (LCI) during a three-season period of unprecedented rise in Lake Huron water level which followed aggressive growth of Eurasian watermilfoil (Myriophyllum spicatum), an exotic aquatic macrophyte.
In the same time frame LCI phytoplankton populations decreased fivefold based upon chlorophyll-a concentrations while nutrients in the form of soluble phosphorus doubled. It is not known if the observed shifts in phytoplankton density and phosphorus concentration were in response to an abrupt water level increase, the rapid demise of M. spicatum, a combination of the two, or if a review of LCI water chemistry archive data will exhibit a similar pattern.

pdf Water Level Change Example

Water Level Range: 2012-2016