Engineered Stormwater Management Techniques

Which of these is a renewable resource?

Coal
Iron
Vegetative lands (correct)
Copper

What is a characteristic of non-metallic minerals?

They contain metals
They are softer and do not shine (correct)
They can be melted to form new products
They are harder and shiny

What is the purpose of environmental technology?

To increase the use of non-metallic minerals in industry
To find alternative sources of metallic minerals
To monitor and conserve the natural environment and resources (correct)
To extract more non-renewable resources from the earth

Which of these is an example of a renewable energy source?

Sun (A) Signup and view all the answers

What is the goal of water purification technology?

To have dirt/germ/pollution free water flowing through the environment (C) Signup and view all the answers

Which of these is classified as an inorganic resource?

Fossil fuels (B) Signup and view all the answers

What is the purpose of an infiltration trench?

To create underground reservoirs for stormwater runoff (C) Signup and view all the answers

What are grass filter stripes used for?

To treat surface flow from adjacent impervious areas (D) Signup and view all the answers

What is the first step in purifying surface water?

Screening to remove large debris (C) Signup and view all the answers

What is the purpose of an infiltration basin?

To provide temporary storage of stormwater runoff in highly permeable soils (B) Signup and view all the answers

What are grass swales used for?

To slow down and partially infiltrate stormwater runoff (B) Signup and view all the answers

What is the main purpose of water purification?

To remove undesirable chemicals, biological contaminants, suspended solids and gases from contaminated water (C) Signup and view all the answers

What is the purpose of pre-chlorination in water treatment plants?

To minimize the growth of fouling organisms (B) Signup and view all the answers

Where should the sedimentation basin ideally be located in relation to the flocculation basin?

Close to the flocculation basin (C) Signup and view all the answers

What type of filters are used when there is sufficient land and space available in a water treatment plant?

Slow sand filters (A) Signup and view all the answers

Which disinfection method uses polymer membranes with microscopic pores to filter out dissolved substances?

Ultrafiltration membranes (D) Signup and view all the answers

What makes chlorine dioxide a faster-acting disinfectant than elemental chlorine?

It provides a powerful oxidizing agent (B) Signup and view all the answers

Which compound is described as an unstable molecule that readily gives up oxygen, acting as a powerful oxidizing agent?

Ozone (D) Signup and view all the answers

What does hydrology study?

Properties of the waters of the earth (D) Signup and view all the answers

Why is groundwater often preferred over surface water for water supply?

Groundwater is less vulnerable to pollution (A) Signup and view all the answers

What is the primary purpose of retention ponds?

To improve water quality from stormwater flows (D) Signup and view all the answers

What is the main function of On-site Stormwater Detention (OSD)?

To collect and store rainwater temporarily (B) Signup and view all the answers

Which urban water management technique provides benefits of conserving potable water and reducing stormwater runoff?

Green roofs (D) Signup and view all the answers

What do constructed wetlands primarily aim to do?

Improve water quality from stormwater flows (C) Signup and view all the answers

What is the most thorough method of large-scale water purification available?

Reverse osmosis (A) Signup and view all the answers

What is the purpose of using iron in water treatment?

To remove arsenic from water (C) Signup and view all the answers

What is the key characteristic of the direct contact membrane distillation (DCMD) process?

It uses heated seawater passed along a hydrophobic polymer membrane (B) Signup and view all the answers

What is the main purpose of the gas hydrate crystals centrifuge method?

To form gas hydrate crystals from a mixture of carbon dioxide (or other low molecular weight gas) and contaminated water (D) Signup and view all the answers

What is the key difference between reverse osmosis and desalination?

Reverse osmosis is a type of desalination process (D) Signup and view all the answers

What is the purpose of in-situ chemical oxidation (ISCO) in water treatment?

To destroy chemical contaminants in soil or groundwater (D) Signup and view all the answers