Analysis Of Water Status Quality And Flood And Innundation Causes In Rawa Matang Hanau Irrigation Area Balangan District
Journal Title: IOSR Journal of Mechanical and Civil Engineering (IOSR-JMCE) - Year 2018, Vol 15, Issue 5
Abstract
Matang Hanau is an irrigated swamp area located in Lampihong District, Balangan Regency this will be developed into a swamp irrigation area. The area is inhabited by transmigration community with oil palm gardening as their livelihood. The plantations products obtained were unsatisfactory because the land was often flooded due to flooding that often occurs during the rainy season.The transmigration community is also challenged with the clean water problem for their daily needs.The community must fulfill their need for drinking water by buying from outside the transmigration area.Whereas bathing and washing, they use water in the existing channel of the swamp irrigation. On channels where people use the water, there are cages of chicken and cattle farms, so that the water used by the community has been polluted by the waste of chicken and cattle farms. Along with the use of water in these channels, health problem such asitchiness arises. This study analyzes the status of the channel's water quality by using the pollution index method and analyzes the causes of floods and inundation. Research regarding the causes of flooding and inundation was taken uses the QGIS application with the Rivergis plugin to model channel geometry which is then analyzed using the hecrace application to determine the hydrodynamic model on the channel.The analysis results of the water status quality by the pollution index method suggested that the water in the swamp irrigation channel was lightly polluted.Analysis of the causes of flooding and inundation on the existing channel to the flood debit plan with a return period of 1 year, 2 years, 5 years, and 10 years gives the results that the existing channel section is unable to accommodate the smallest flood debit that occurs at 2 years return of 10.94 m3/sec, thus causing flooding due to the water levels that exceed the depth of the channel so that it floods the plantation area.Based on the study results, the existing channel must be redesigned in order to accommodate the largest flood debit with a 10-years return period of 14.66 m3/sec. It was then analyzed by hec-race where it shows the hydrodynamic model of the channel crossing to the largest flood debit plan.
Authors and Affiliations
Chandra Wahyu Sulistyo, Rony Riduan, Hafiizh Prasetia
Keywords
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- EP ID EP438516
- DOI 10.9790/1684-1505016573.
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