Minnesota Stormwater Manual test page 5 Revision as of 15:39, 8 March 2022 by Mtrojan (talk | contribs)(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff) Minnesota Stormwater Manual test page 5

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Green infrastructure quiz

• GSI=Green stormwater infrastructure
• GI=Green infrastructure

1. Which of these is typically not considered a green stormwater infrastructure practice?
   1. Constructed wetland
   2. Permeable pavement
   3. Underground sand filter
   4. Vegetated filter strip
2. True or false: All GSI practices are vegetated
3. True or false: All vegetated GSI practices incorporate native vegetation into the practice
4. Rank these in order of benefit for habitat
   1. Bioretention
   2. Constructed wetland
   3. Filter strip
   4. Green roof
5. Rank these in order of benefit for energy savings
   1. Harvest and reuse
   2. Bioretention
   3. Green roof
6. Which of these is likely not a benefit of native vegetation?
   1. Increases pollinator diversity
   2. Improves soil hydrologic function
   3. Reduces maintenance needs during establishment
   4. Provides habitat for a wider range of species (i.e. increases biodiversity)
7. Explain
   1. Plugs are generally preferred over seed in establishing vegetation in bioretention practices
   2. Mulch is recommended in some GSI practices but not others

Answers

1. Underground sand filter
2. False: examples of non-vegetated practices include but are not limited to permeable pavement and underground infiltration
3. False: while preferred in most situations, native vegetation is not necessary for practices considered to be GSI. An example would be irrigation of an athletic field from a harvest/reuse system.
4. Constructed wetland > bioretention > green roof > filter strip
5. Green roof > harvest/reuse > bioretention
6. Reduces maintenance needs during establishment
7. Explanations
   1. Seed is easily washed away in any practice involving moving water, including bioretention
   2. Mulch can inhibit seed germination and seedling growth and can also be washed away, depending on the mulch properties. However, mulch is recommended in practices where seedling establishment is not a concern. Mulch can provide several benefits, including soil protection, improved soil structure, and improved soil hydrology.