The Wappa Dam is a mass concrete gravity arch dam with earth-fill abutments and an un-gated spillway across the South Maroochy River that is located in the South East region of Queensland, Australia. The main purpose of the dam is for supply of potable water for the Sunshine Coast region.[1][3] The impounded reservoir is also called Wappa Dam. The dam and most of the reservoir are within Kiamba with the most northerly part of the reservoir in Cooloolabin, both in the Sunshine Coast Region.[4]
| Wappa Dam | |
|---|---|
 Wappa Dam, 2018 | |
  Location of the Wappa Dam in Queensland | |
| Country | Australia |
| Location | South East Queensland |
| Coordinates | 26°34′12″S 152°55′19″E / 26.57000°S 152.92194°E |
| Purpose | Potable water supply[1][2] |
| Status | Operational |
| Opening date | 1963 |
| Operator(s) | SEQ Water |
| Dam and spillways | |
| Type of dam | Gravity dam |
| Impounds | South Maroochy River |
| Height | 24 m (79 ft)[1] |
| Length | 138 m (453 ft)[1][2] |
| Dam volume | 12×103 m3 (420×103 cu ft)[1] |
| Spillway type | Uncontrolled |
| Spillway capacity | 1,420 m3/s (50,000 cu ft/s)[1] |
| Reservoir | |
| Total capacity | 4,610 ML (1,010×106 imp gal; 1,220×106 US gal)[2][3] |
| Catchment area | 69.7 km2 (26.9 sq mi)[1][2] |
| Surface area | 74 ha (180 acres)[3] |
| Website www.seqwater.com.au | |
Location and features
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The dam is located 8 kilometres (5.0 mi) north-west of Nambour.
Completed in 1963, the concrete dam structure is 24 metres (79 ft) high and 138 metres (453 ft) long. The 12-thousand-cubic-metre (420×103 cu ft) dam wall holds back the 4,614-megalitre (1,015×106 imp gal; 1,219×106 US gal) reservoir when at full capacity. From a catchment area of 69.7 square kilometres (26.9 sq mi) with a mean annual rainfall of approximately 1,700 millimetres (67 in) that includes much of the Maroochy River, the dam creates an unnamed reservoir with a surface area of 74 hectares (180 acres). The un–gated spillway has a discharge capacity of 1,420 cubic metres per second (50,000 cu ft/s).[1] Initially managed by the Sunshine Coast Regional Council, management of the dam was transferred to SEQ Water in July 2008 as part of a water security project in the South East Queensland region, known as the South East Queensland Water Grid.[5] The accompanying water treatment plant is also managed by SEQ Water.
Recreational uses
editRecreational use of the lake and its surrounding bushland reserve is severely limited, with prohibited recreational activities including swimming, water skiing, diving, mountain biking, horse riding, canoeing and kayaking, camping, and bushwalking. Picnic facilities are available at four locations around the dam,[2] with access prohibited outside of daylight hours.[3]
See also
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References
edit- ^ a b c d e f g h "Register of Large Dams in Australia". Dams information. Australian National Committee on Large Dams. 2010. Archived from the original (Excel (requires download)) on 12 December 2013. Retrieved 5 July 2014.
- ^ a b c d e "Wappa Dam". Water supply: Dams and weirs. Seqwater. 2014. Retrieved 5 July 2014.
- ^ a b c d Harrison, Rod; James, Ernie; Sully, Chris; Classon, Bill; Eckermann, Joy (2008). Queensland Dams. Bayswater, Victoria: Australian Fishing Network. ISBN 978-1-86513-134-4.
- ^ "Queensland Globe". State of Queensland. Retrieved 24 July 2020.
- ^ Hurst, Daniel (7 July 2009). "Water funds slash debt". The Bayside Bulletin. Retrieved 21 April 2008.
External links
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- "Maroochy River: Raising Wappa Dam". Save the Mary River (PDF). Save The Mary River Coordinating Group Inc.
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