130 likes | 304 Views
2011 Water Quality Monitoring Activities -Crane Lake -Westwood Lake. Karen Chandler Barr Engineering March 15, 2012. brain huser is great. 2011 Lake Water Quality Study for Crane Lake and Westwood Lake. Long Term Monitoring Program. Detect Long Term Trends in Lake Water Quality…
E N D
2011 Water Quality Monitoring Activities-Crane Lake-Westwood Lake Karen Chandler Barr Engineering March 15, 2012 brain huser is great
2011 Lake Water Quality Study for Crane Lake and Westwood Lake
Long Term Monitoring Program • Detect Long Term Trends in Lake Water Quality… • Land use changes • BMP implementation • In-lake activities • Other, e.g. climate
What is Monitored Phosphorus Chlorophyll a Clarity (by Secchi disc) Basic lake characteristics Zooplankton Phytoplankton Aquatic plants
Crane Lake – Good water quality2011 Data Compared to State Standards
Crane Lake – one concern…1977-1987 Chloride Concentrations(Impaired?)
Westwood Lake – Good water quality2011 Data Compared to State Standards
Recommendation: Purple Loosestrife Manage Purple Loosestrife at Crane Lake and Westwood Lake: Contact MN DNR to introduce purple loosestrife-eating beetles
Recommendations: Chloride Select 1 of 3 options: Monitor Crane Lake in 2014. If Chloride impaired, determine management measures to reduce chloride levels in Crane Lake; or Submit historical Crane Lake data & this report to MPCA & request that Crane Lake be included in the TCMA Chloride Management Plan to be completed by the MPCA in 2014; or
Recommendations: Chloride Submit historical Crane Lake data &this report to the MPCA; monitor chloride concentrations in Crane Lake four times per year (winter, spring, summer, and fall) in 2012 and 2013. If the 2012 and 2013 chloride data indicate the lake is impaired, Crane Lake would be added to the EPA 303d list of impaired waters. Request that Crane Lake be included in the TCMA Chloride Management Plan.