ANALISIS EVALUASI DIMENSI BANGUNAN PELIMPAH BANJIR (SPILLWAY) SITU SIDOMUKTI

Edy Sriyono

Sari


The purpose of Sidomukti Situ spillway building was to evaluate the dimensions and the capability of spillway building to discharge flood events with a possible maximum flood (PMF).
Evaluation was conducted by calculating the flow through the top point of spillway building by using the formula : Q = m.B.H1,5, where: Q is the flow through of spillway = PMF discharge (m3/dt), B is the width of the spillway body's (m), H is the height of water in the pond = high pressure above the spillway (m), and m is the coefficient of spillway. With the above formula, high pressure above the spillway (H) can be calculated, where the value of B is determined. Wide unity discharge planning was formulated : q = Q/B, where: Q is the flow through the spillway = 50 annual flood disharge (m3/dt) and B is the width of the spillway body's(m).

Based on the evaluation results obtained in the high-water elevation above spillway building generated when successive return periode for 5, 25, 50, 100, and 1000 years is 1.43 m, 1.56 m, 1.61 m; 1.64 m and 1.75 m, the length of the pool megrim is 16.22 m, 17.29 m, 17.64 m, 17.94 m and 18.76 m respectively.

Keywords:dimension, spillway, small dam


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Referensi


DAFTAR PUSTAKA

Harto, S., 1993, Analisis Hidrologi, Gramedia Pustaka Utama, Jakarta.

Loftin, M. K., 2004, Standard Hanbook For Civil Engineers (Water Resources Engineering), McGraw-Hill(www.digitalengineeringlibrary.com).

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Triatmodjo, B., 2009, HidrologiTerapan, Beta Offset, Yogyakarta.


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