Okay – the decay of organic materials in oxygen-poor shallow waters doesn't smell great. While this can worsen when nutrient pollution triggers excess algae growth, it is an otherwise natural process. Odor is a small price to pay for the vast benefits we receive from shallow lakes and wetlands; they retain floodwater and pollutants present in runoff, recharge groundwater, and provide fish and wildlife habitat that supports bountiful opportunities for hunting, fishing, bird-watching, and other outdoor recreation.

For many, the word "lake" triggers a vision of clear and deep water ideal for swimming and boating. However, over 5,000 of Minnesota's lakes larger than 50 acres are actually shallow lakes that are less than 15 feet deep and dominated by wetland habitat. In shallow lakes, sunlight reaching the lakebed, combined with readily available nutrients, increases the growth of aquatic plants. Shallow water also allows for more abundant emergent vegetation such as bulrush and  cattails, which can extend well beyond the shoreline and even become dominant, especially during periods of drought. Mucky lakebed conditions are produced as large quantities of organic materials die, settle to the bottom, and decompose over time.

Shallow lakes can exist in one of two states: clear or turbid. Clear shallow lakes are dominated by submerged vegetation, which often grows densely and can reach the water's surface. These aquatic plants are a source of food and habitat for fish and wildlife such as amphibians, waterfowl, and invertebrates at the base of both aquatic and terrestrial food webs. On the flip side, turbid shallow lakes are dominated by algae, which clouds up the water and restricts the growth of submerged aquatic vegetation. Turbid lakes typically support fewer fish and wildlife due to the lack of habitat provided by aquatic plants. 

Recent extreme flooding has highlighted the dynamic and powerful nature of flowing water. If you live on a river or even a smaller stream, you've likely witnessed these characteristics and their impacts firsthand. With flood waters receding, now is a great time to assess the condition of your riverbank and consider stewardship and stabilization approaches that will help protect your property and the water you live on. Fortunately, we've created a brand new resource to help guide you through this process – the "Our Riverbank Connection" animated video!

Living by a creek, stream, or river provides many benefits and a unique opportunity to support water quality and wildlife. It also comes with some challenges such as erosion, which can eat away at your land over time. In this video, you will learn how to create a river-friendly lawn and riverbank that also protects your property by reducing or repairing losses from erosion. Video topics include:

• Recommended lawn care practices
• Signs of erosion and factors that may make your bank more susceptible to it
• Creating a well-vegetated bank
• Bank stabilization approaches to address active erosion
• Project planning and construction – what to expect

Watch "Our Riverbank Connection" here: https://www.youtube.com/watch?v=Et9wLuIrRuA

Want to learn more about streams and rivers and how you can help them, even if you don't live on their banks? Watch Part 1 of the "Our River" Installment – "Our River Connection" – here: https://www.youtube.com/watch?v=rdQEcmLyQJI 

Anoka County is rich in wetlands that provide countless benefits to the county's ecological and water resources. Wetlands capture and filter floodwater and runoff, provide habitat for aquatic and terrestrial species, and help recharge the groundwater supply. Anoka County has lost approximately half of its original wetlands since European settlement. Historically wetlands have been drained and filled to create more useable land for agriculture and rural development. Many regulations exist to protect wetlands today, but a history of impacts combined with present-day challenges such as invasive vegetation, increasing demands for housing and suburban development, and altered hydrology threaten what remains.

For these reasons, the Anoka Conservation District (ACD) has increased efforts to identify wetland protection and restoration opportunities. An inventory of restorable wetlands was recently completed for two priority watersheds in the county including the Ford Brook watershed and the Rum River direct drainage watershed. Altogether, approximately 70 potential wetland restoration sites were identified across both private and public lands. In the coming months, ACD will conduct outreach and explore these possible opportunities in more depth, with the goal of restoring hydrology and native vegetation at one or more sites in 2024.

ACD has enhanced wetland habitat via vegetation management for several years, but hydrologic restorations are a relatively new endeavor which require careful planning, holistic approaches, and multi-agency collaboration. In 2022, five acres' worth of wetlands on public land were successfully restored by plugging drainage ditches which restored previous hydrology conditions and managed current vegetation such as the invasive reed canary grass to improve habitat with a diversity of native species.

For more information contact Brenna Keith, This email address is being protected from spambots. You need JavaScript enabled to view it.

Street sweeping doesn't just improve the appearance and function of your neighborhood's roads; it's also one of the most cost-effective ways to reduce nutrients, sediment, and other pollutants entering our lakes, rivers, and wetlands. Common materials such as leaves, yard waste, sand, road salt, vehicle fluids, litter, and other debris accumulate in street gutters and have nowhere to go other than down the storm drain and, eventually into local waterways – flushed in by water during snowmelt and storm events.

Many cities complete street sweeping twice per year: once in the spring to remove solids from winter road treatment, and again in the fall to remove fallen leaves. However, gaps in sweeping schedules give these pollutants time to re-accumulate and flush into storm drains (and thus downstream waterbodies) before they can be removed. Increasing the frequency of street sweeping can greatly reduce pollutant loads in stormwater, which is why the Anoka Conservation District has added enhanced street sweeping considerations to its "water quality toolbox".

Enhanced street sweeping analyses combine area-specific information such as tree canopy cover and storm sewer networks with research-based pollutant recovery estimates to improve recommendations for the timing, frequency, and location of street sweeping. This approach has recently been applied in the direct drainage watersheds for Martin and Linwood lakes. 

Find more information about the benefits of street sweeping here: MN Stormwater Manual: Street Sweeping 

ACD Contact: Breanna Keith, This email address is being protected from spambots. You need JavaScript enabled to view it.