Kajian Topografi dan Hidrologi Sempadan Sungai Tukad Oos Kabupaten Bangli-Gianyar
Abstract
The topographic survey is the first stage to determine the condition of the land along the study area. The research method is descriptive and qualitative. As a result of the study, the condition of the Tukad Oos cliffs is still natural and the composition is in the form of rocks with fairly steep slopes. The cliffs of Tukad Oos have a slope of 16-900 and a depth of 10-25m. Tukad Oos's river shape flow along the study area consists of straight (straight), meandering (turning), and sinuous (between straight and turn). The upstream boundary condition used in this modeling is Hulu Tukad Oos, and the results of its hydrological analysis are in the form of planned flood levels. The downstream boundary is the mouth of the Tukad Oos River. Tukad Oos existing condition modeling was designed to determine the hydraulic profile of a river under existing cross-sectional conditions. The modeling is carried out by using flood discharges for return periods of 10, 25, and 50 years as upstream boundary conditions, and water levels. The bottom slope of Tukad Oos at the review location along the 52 km has an average base slope from upstream to downstream, which tends to vary, considering the varying conditions of the embankment elevation and bottom slope of Tukad Oos, it is necessary to handle/modify the cross-section of the river with several different alternatives.
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Copyright (c) 2023 Irma Suryanti, I Nyoman Harry Juliarthana, Komang Ayu Sari Galih, I Putu Wahyu Wedanta Pucangan
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