Wetland Preservation
In a Nutshell
A wetland is a natural community characterized by soils that developed in saturated conditions and support a diversity of water tolerant plants. The array of species is a function of the seasonal pulse disturbances, such as spring flooding, that occur in that wetland.
There are several types of wetlands, including not only marshes and swamps but also oxbow lakes, sloughs, and bottomland forests.
Wetlands serve several ecological functions such as:
- water storage which helps to reduce flood heights and reduce risks of property damage and loss of life
- water filtration by reducing the level of contaminants, such as agricultural nutrients, from water
However, it is important to note than wetlands must be in a healthy state to perform these functions effectively. Unrestricted use of wetlands as depositories of point and non-point pollution (such as urban stormwater) can compromise their functionality. Thus in order to realize the multiple benefits of wetlands, effective management practices are required to ensure the health of the wetland ecosystem.
Practical Solution
The “How To”
-
Preserving wetlands involves a suite of best management practices that address stormwater issues and land use planning. Wetlands exist in a delicate equilibrium which can be impacted by atypical stormwater flows. Managing stormwater to relieve these impacts will help to ensure the longterm health and continued function of the wetland. Furthermore, the historic wetlands may have been so altered (for example converted to cropland) that they are now candidates for restoration efforts.
This implementation plan is a menu of best management practices focused on the specific water quality issues that impact wetland health. Selecting appropriate best management practices begins with identifying the important characteristics of the wetland.
Identify/Evaluate Desired Natural Wetland Functions
Identify Potential Threats to Wetland Functions
Identify Watershed Management Practices that Address these Threats
Planning & Zoning
-
The federal government aims to protect wetlands through a number of different avenues. These include regulations through legislation such as Section 404 of the Clean Water Act. Economic incentives include tax deductions for selling or donating wetlands to qualified organizations. Additional programs include cooperative programs and land acquisition through actions such as establishment of national wildlife refuges.
Dollars & Cents
-
Preserved wetlands provide the opportunity for economic gain through tourism. The wetland area of the Florida Keys is estimated to bring in $800 million in annual tourism revenue. Wetland preservation programs also reduce the damages cause by flood events and storms due to their ability to retain water. The success of these programs can be measured in the savings resulting from their implementation, through either a reduction in the cost of damages or a reduction in the cost of investment in stormwater retention infrastructure.
Measuring Success
-
The most significant way to measure the success of a wetland preservation program is measuring the number of acres of wetland that remain in an area or in a region. The status of the wetlands is another manner in which to measure the success of the program. A final metric for analyzing the success of a wetland preservation project is to analyze the functionality or the service ability of the wetland.
Case Studies
Discover More
-
The Environmental Protection Agency's main page on Wetland Protection can be found here.
This Best Practices Guide reviews the success stories of the the Middle Mississippi River Partnership (MMRP). The MMRP has had a strong record including acquiring over 6,600 acres for public use, developing conservation plans for over 3,200 acres of private and public land, and creating over 600 acres of wetlands.
This Green Infrastructure Roadmap, prepared by Heartlands Conservancy, is meant to act as starting point on the road to realizing a green infrastructure vision for Southwestern Illinois and the region. (Green infrastructure refers to infrastructure that mimics natural processes, including wetlands, parks, prairies, open space, and woodlands.)