Transcript of 'About flooding' video

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[Video: Screen display of a motion graphic image of Auckland city.]

Voice: "Flooding is Tāmaki Makaurau Auckland's most frequently occurring natural hazard. Because of the geography, most of our flooding is flash flooding, which can occur rapidly, after intense rainfall when the capacity of the local drainage systems is exceeded. Flash floods can occur in areas where no streams are present."

[Video: Text on screen reads 'How do these floods occur?' Below the text is an illustration of Auckland showing rainwater moving into the stormwater pipe system. Another graphic shows trees and ground water absorption with a background of the city.]

Voice: "How do these floods occur? During a storm, rain that falls onto the road or other hard surfaces flows into the storm water pipe system, or water can be absorbed directly into the ground."

[Video: Graphic shows moving cars, building, and rain with the city in the background.]

Voice: "Most of the time the capacity of the local drainage system is sufficient to avoid flooding of buildings. If the intensity of the rainfall increases, the piped system may reach capacity."

[Video: Text on screen reads 'Overland flow' with an arrow pointing to overflowing rainwater on the road.]

Voice: "Water that has nowhere else to go will start flowing over the ground, across roads, public and private properties. Water will naturally flow down to low areas, getting trapped and starting to pull or pond."

[Video: Text on screen reads 'Ponding' with a motion graphic of moving cars, rain, overflowing rainwater on road and area with trees and grass.]

Voice: "These areas are prone to flooding."

[Video: Motion graphic of farmlands and residential area with rising stream levels due to rain and flooding nearby areas.

Voice: "During heavy rain, the water level in a stream will rise until eventually the water may no longer be contained within the banks. It overtops and floods the land either side. This is called a flood plain. In flat areas, flood plains can be very large."

[Video: Screen displays a motion graphic of heavy rain in a park with buildings and moving vehicles in the background.]

Voice: "Flooding can also occur where historically there was a stream which has since been piped. During times of intense rain, water may still pond here and flooding may occur where you do not normally see water."

[Video: Motion graphic of Auckland Transport bus moving through a heavy rain area, reduction in water levels in parks, people running, walking and spending time in a park].

Voice: "You may see Council parks and reserves underwater during a storm, these are intentionally flooded to divert water away from buildings. Where possible, we are possible Council as replacing pipes and parks and reserves with naturalized streams and wetlands to hold more flood water in a storm and enhance the environment."

[Video: Motion graphics showing a waterfront area of Auckland covered in heavy rain and moving vehicles on the Auckland Harbour bridge.]

Voice: "We are expecting to see more frequent and severe floods across the region due to the impacts of climate change. Check out our other videos to find out how to stay safe during a flood."

[Video: Text on screen displays logos of Civil Defence, Auckland Emergency Management and Auckland Council. Below the logos, text reads aucklandemergencymanagement.org.nz and aucklandcouncil.govt.nz]

[Video ends]

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