Advantages and disadvantages of above- or below-ground tanks and stormwater ponds
Link to this table
| Type of storage system |
Advantages |
Disadvantages |
| Open systems (e.g. ponds) |
- Low capital costs
- Low maintenance costs
- Provide stormwater treatment
- Can utilize existing stormwater ponds
|
- Public safety concerns if not fenced
- Habitat for mosquito breeding
- Loss to evaporation
|
| Below-ground, closed systems |
- Concealed from view
- Do not consume above-ground space
- Can be freeze protected
|
- Greater capital costs
- Higher maintenance costs
- Require stronger structure in traffic areas
- Require pumping
- Access can be difficult
|
| Above-ground, closed systems |
- Moderate capital costs
- Moderate maintenance costs
- Can be gravity fed
|
- Aesthetic concerns
- More susceptible to weather conditions than below-ground systems (UV, freezing)
|
