What are detention tanks?
Detention tanks are extremely effective in minimizing the risks of local flooding. These are temporary storage places for water from melted snow and rain that falls from the roof and other hard surfaces. This water is then released gradually into the main drainage to avoid local flooding. The tanks come with a small hole which is called the orifice. The size of the detention tank and the diameter of the orifice outlet are customized to permit a particular flow rate that suits the nature of the area and building you are residing in. It helps control the water released into the local drainage and reduces the impact of extreme outflows from big and small structures in the area.
Detention tanks also filter out sediments and debris like fallen leaves and silt. However, this debris tends to accumulate and become a stubborn block over time if it is not cleared periodically. This will cause the storm water to overflow out of the pipes and cesspits, causing flooding on the property.
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How do detention tanks work?
In Auckland, councils are stepping up their game with sustainability projects to reduce stormwater and wastewater flooding. Detention tanks are a big step in making this possible. The North Shore of Auckland, especially its subdivision areas, is based on clay; therefore it has made the installation of underground detention tanks mandatory.
Heavy rain unleashes huge amounts of water on a property in a short period of time. When combining that with the water flowing from the roofs of all the structures in a locality, a certain level of local flooding is unavoidable.
This is where detention tanks come into play!
Detention Tanks catch and temporarily hold water from the roofs during these high-intensity storms and rains before releasing it slowly into the local drains. This regulated release through the orifice in the tanks helps control the deluge in the sewage lines and reduces erosion and other accidents that usually happen due to uncontrollable gushing water on the roads.
