“Gray infrastructure is the system of pipes and ditches that channel storm water. Green infrastructure is the harnessing of the natural processes of trees and other vegetation — so-called ecosystem services — to carry out the functions of the built systems. Green infrastructure often intercepts the water before it can run into streets and become polluted and stores the water for gradual release through percolation or evapotranspiration. Trees also clean dirty water through natural filtering functions.

 

Advocates say green infrastructure isn’t just about being green — it makes financial sense, as well. Its cost-effectiveness depends on how benefits are assigned and valued, and over how long a time scale, but green has been shown to be cheaper than gray.”

“That will allow the federal government to build a new barrier there to keep sea lampreys from breeding in the river. Managers of the fishery expect that will bring the lamprey problem under control in Lake Michigan.”

Community outreach specialist Kristin TePas rinses a PONAR dredge used to collect sediment containing benthic organisms.

IISG Great Lakes ecosystem specialist Paris Collingsworth deploys a net to collect zooplankton.

“The Great Lakes National Program Office (GLNPO) of the U.S. Environmental Protection Agency (USEPA) is responsible for monitoring the offshore water quality of the Great Lakes to evaluate water quality over time and identify any emerging water quality problems. Comprehensive water quality surveys are conducted in all five Great Lakes in both the spring, when the water is cold and well mixed, and in the summer, when the lakes are biologically active. The R/V Lake Guardian is currently being used to conduct the summer water quality survey.”

Conserving water has always been important for a number of reasons, but recent studies are showing that it’s a serious issue. As the need for water grows worldwide, the way that we use water requires some significant consideration, study, and action. 

“Water is reused in two main ways: non-potable reuse, in which treated wastewater is used for agriculture and landscape irrigation, industrial applications (such as cooling processes), toilet flushing and fire protection; and indirect reuse of wastewater to recharge ground water supplies, allowing treated wastewater to percolate down to aquifers and replenish water sources. Overall, non-potable and indirect reuse of water in the U.S. is growing rapidly, with more than 2 billion gallons reused per day, and volume increases at an estimated 15 percent annually.”

Watersheds are areas where water comes together and drains to a common place. In addition to the streams and rivers and creeks that we can see, though, watersheds encompass a huge range of pathways for water, and your nearby water supply might be part of a very large system that spans multiple states. 

“Of course, obtaining sustainable development in town isn’t enough, in and of itself, to guarantee high quality, fishable and swimmable rivers and streams. Industry plays a part; utilities and waste water treatment plants play a part; sensitive farming, ranching, and/or timbering play a part, all in different proportions depending upon the particular watershed in question.” 

“Chicago’s new elaborate system of buoys and statistical models will monitor 16 of the city’s 24 beaches, and Park District officials are seeking grant money from the U.S. Environmental Protection Agency to expand the system to cover all beaches by next summer.

 

The model will predict the levels of harmful bacteria at each beach using data on the location of sources of contamination, like colonies of sea gulls or sewer outlets; the motion of waves that can disturb bacteria growing in the sand; lake-current speeds; water temperature; and sunlight.”