<![CDATA[In this research, the Manikin Dam will use a Morning Glory-type spillway structure. The dam, which draws its water from the Manikin River and has a watershed area of 49.31 km², is designed as a Random Rubble Limestone Fill Type with a Vertical Core. It has a storage capacity of 28.20 million m³ and a normal inundation area of 148.7 hectares. The Manikin Dam is planned to meet the irrigation needs of 310 hectares of agricultural land in Kupang Regency and serve as a raw water source of 700 liters/second for both Kupang City and Kupang Regency. It will also function as a Micro-Hydro Power Plant (PLTMH) with a capacity of 0.125 MW and provide flood control with a capacity of 531.70 m³/second. Based on technical data, the dam has an inlet diameter of 11.78 m, a throat section length of 20 m, and a tunnel length of 610.74 m. This study uses quantitative data, including both primary and secondary sources. The objective of this research is to determine the flow characteristics within the Morning Glory spillway structure when subjected to a 1000-year design flood discharge (Q1000). The hydraulic analysis of the spillway uses the continuity equation and Bernoulli's equation, with the discharge coefficient (Cd) calculated using the Iwasaki method approach. Based on the research results, the flow within the tunnel and downstream of the stilling basin is supercritical.]]>
Copyrights © 2026
