Disaster Mitigation at Drainage Basin of Air Dingin Padang City

LUSI, UTAMA (2021) Disaster Mitigation at Drainage Basin of Air Dingin Padang City. Disaster Mitigation at Drainage Basin of Air Dingin Padang City.

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Abstract

Abstract— DAS (Drainage Basin) Air Dingin located in Koto Tangah Padang City. DAS Air Dingin come from somesmall river in upstream. Meeting from some small river reside in the area of Lubuk Minturun. DAS Air Dingin own the height until 1.800 m above water sea level and have the rain pattern which high relative. Floods represent one of event which is often happened by the effect of farm closing upriver decrease, also the effect of sedimentation and topography. Floods that happened in the year 2007 resulting collaps embank in both sides of river of effect charge the water exceed the boundary accomodate river. From analysis morphometri wide of DAS 130,70 km2, long river 19.87 km. ramp 25 - 45%be at 96.05km2 ( 74% DAS). Daily rainfall 240 mm. From study morphometri result the DAS inclusive of floods and sedimentation. Effect of durability of bevel and rainfallhappened by floods in area downstream that is area Bungo Pasang and Pasie Nan Tigo. Planned by four (4) location evakuasi in the map for the Bungo Pasang which be at the distance 100 - 200 m and also three (3) location evakuasi for the Pasie nan Tigo with the distance 100 m from DAS downstream. Keywords: Mitigasi, Rainfall, Morphometri, Evakuasi

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