Stormwater 101 Exam 1. Because of conservation measures, demand for water is decreasing, in spite of a rising population.* True False 2. Water quality in Minnesota is steadily improving.* True False 3. What are the three problems that are associated with urban runoff?* Demand, Quality, Erosion Volume, Demand, Salt Volume, Rate, Quality Quality, Erosion, Salt 4. There are the three different categories of runoff pollutants- Physical, Chemical and Biological. Which of these pollutants fit into each category?4a. Temperature* Physical Chemical Biological 4b. Sediments* Physical Chemical Biological 4c. Fast moving water* Physical Chemical Biological 4d. Turbidity* Physical Chemical Biological 4e. Phosphorus* Physical Chemical Biological 4f. Pet waste* Physical Chemical Biological 4g. Bacteria* Physical Chemical Biological 4h. Shampoo* Physical Chemical Biological 4i. Nitrogen* Physical Chemical Biological 4j. Too much water flowing* Physical Chemical Biological 4k. Pharmaceuticals* Physical Chemical Biological 5. Natural hydrologic systems have a range of features that function to clean up water before it flows into rivers and lakes. We can mimic those functions, even if development has removed or damaged the natural features. In the following table identify the function of a natural system that each feature replaces in a constructed landscape.5a. Ponds* Landscape Low Spots Conduits Storage 5b. Swales* Landscape Low Spots Conduits Storage 5c. Pervious pavements* Landscape Low Spots Conduits Storage 5d. Biobasins* Landscape Low Spots Conduits Storage 5e. Dry creek beds* Landscape Low Spots Conduits Storage 5f. Tree trenches* Landscape Low Spots Conduits Storage 5g. Culverts* Landscape Low Spots Conduits Storage 5h. Constructed wetlands* Landscape Low Spots Conduits Storage 5i. Raingardens* Landscape Low Spots Conduits Storage 5j. Rain barrels* Landscape Low Spots Conduits Storage 6. What is the goal of green infrastructure?* To strengthen and enlarge stormwater pipes To reduce flooding To mimic or restore pre-developement hydrology To reduce the costs of improving water quality 7. Multiple Choice: What are the general categories of design considerations for mimicking natural drainage systems?* a) Need to design for changing climate b) Need to design like historic natural system c) Watershed approach d) a and c e) a and b 8. Multiple Choice: BMPs stand for:* a) Best management prevention b) Best management practice c) Better mitigation policies d) Best minimization practice 9. Fill in the blank: Four general types of bmps are structural, non-structural, permanent, and ____________________.* Organic Concrete Temporary Flimsy 10. What is the main purpose/function of bmps?* Prevent pollution Reduce stormwater flows Reduce erosion Soak more water into the ground All of the above 11. Multiple Choice: A series of constructed landscape features that manage stormwater is called:* Treatment Train Benefit Train Prevention Series BMP Series 12. Multiple Choice: Which of these are Pollution Prevention BMPs? (Mark all that apply)* Municipal best practices for equipment maintenance Public Education Public Involvement Turf Management Stormwater ponds Better Site Design Street Sweeping Chloride Reduction Programs Illicit Discharge Detection/Elimination Picking up pet waste Native Landscaping 13. Better Site Design (BSD) includes techniques that reduce impervious cover, conserve natural areas, and use pervious areas to better treat stormwater runoff. Which of these are Better Site Design pollution prevention strategies?* Filling wetlands Reduced street widths Tree removal Salt management Disconnect impervious surtfaces Sidewalk removal Stormwater reuse 14. Before implementing any BMP on a site you must first consider:* Labor needed for installing the project Slope of the land Soil quality of site The cost of the project The number and size of plants needed Size of BMP 15. Source Control BMPs reduce the volume of stormwater runoff, promote infiltration, and decrease stormwater runoff pollution. Which is an example of source control BMPs?* Permeable pavement Rainwater harvesting Bioretention/Infiltration/Filtration basins Tree trenches Green roof/Green wall All of the above 16. Stormwater ponds are a type of on-site water treatment BMP. What functions do stormwater ponds provide to designers?* Water storage Infiltration Filtration Moving water off roads (conduits) All of the above 17. Trash, algae, foam, slime, or plants in a stormwater pond indicate there is a problem.* True - poor water quality in a pond is an indicator of a non-functioning pond False - Pond is functioning properly 18. There are three (3) general categories of stormwater tools, and there are four general categories of things these bmps do that help manage runoff. Identify which functions each type of stormwater bmp does best. Some of the examples listed perform more than one function.18a. Yard Waste Management* Pollution prevention Source control On-site treatment 18b. Streambank Stabilization* Pollution prevention Source control On-site treatment 18c. Native Landscaping* Pollution prevention Source control On-site treatment 18d. Healthy Lawns* Pollution prevention Source control On-site treatment 18e. Street sweeping* Pollution prevention Source control On-site treatment 18f. Narrowing streets* Pollution prevention Source control On-site treatment 18g. Public education* Pollution prevention Source control On-site treatment 18h. Preventing Illicit discharges* Pollution prevention Source control On-site treatment 18i. Tree Trenches* Pollution prevention Source control On-site treatment 18j. Raingardens* Pollution prevention Source control On-site treatment 18k. Stormwater ponds* Pollution prevention Source control On-site treatment 18l. Healthy soil* Pollution prevention Source control On-site treatment 18m. Permeable pavements* Pollution prevention Source control On-site treatment 18n. Cisterns and rain barrels* Pollution prevention Source control On-site treatment 18o. Green roofs and walls* Pollution prevention Source control On-site treatment 19. What is most effective on a small residential site?* A large, multi-functional bmp that captures, infiltrates and filters runoff generated by the site A series of small bmps that treats water as it moves across a site
