Individual Folders as an alternative to flood control in the Central of Government Padang City at Air Pacah, Padang

Umar, Zahrul and Istijono, Bambang and Daus, Syafril and Suryani, Rifda (2016) Individual Folders as an alternative to flood control in the Central of Government Padang City at Air Pacah, Padang. In: International Seminar on " Water Resilience in a Changing Wolrd", 29-31 july 2016, Bali. Indonesia.

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Abstract

Earthquake of September 30, 2009 and prediction of tsunami that struck of padang city and government policy of padang city that divides padang city into three zones areas prone to tsunamis, namely red, yellow and green. Red zone, area that is located along the coast to 1 km to east of padang city and constitute zone very vulnerable by the tsunami, the yellow zone is located 1 to 3 km and the red zone> 3 km from the coast towards the east. The impact of this policy, many residents in the red zone move into the green zone located around the road of by-pass padang city. Including the government of padang city moved the center of his government to Air Pacah and was followed by several other government offices such as BPKP, Bung Hatta University, University of Baiturrahmah, Siti Rahmah Hospital and other public facilities. Unfortunately, locations used for construction of residential complexes, offices and public facilities are located in the low topographic. This location inundated during the rainy season because have the shape of basin (depression) and drainage is bad, as it happened on March 22, 2015 in which this region hit by devastating floods that height until reaching 2-3 m. This area is located in the Watershed (DAS) Batang Kuranji, Sub Das Batang Balimbing with its tributaries Batang Maransi and Batang Lurus and this region flanked by this tributaries. In an effort to control flooding that often occurs in this region, one of the efforts that can be done in a short time is to build a polder in every office, residential complexes and other public facilities were built by owner of the buildings around the boundary of land owned, The system was selected, due to building construction of flood control in wide area will require large funds, either to land aquitation and physical development. For area of government office, based of calculation, the high of polder = 1.50 m, Volume of retention ponds in the rain effectively is same as a concentration time with a pump capacity 2 m³ / sec = 102 179 m³, with a capacity 5 m³ / sec = 75.457m³

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