Dry Dams Performance on Consecutive Rainfall During Rainy Season at Upper Ciliwung Watershed

Evi Anggraheni, Dwita Sutjiningsih, Airlangga Mardjono, Teuku Iskandar

Research output: Contribution to conferencePaperpeer-review

Abstract

Jakarta is the capitol of Indonesia which located at the downstream part of Ciliwung. Flooding is a most natural hazard at Jakarta, almost every years its occur at Jakarta. Many infrastructure and researches have been done to decrease risk of flooding. Ciawi and Sukamahi Dams is one of the structural method proposed by government to decrease the peak flood through the retention capacity. That Dams will be constructed with the dry dam type which contain without gates or turbines. Bottom outlet combine with the spillway was design for Ciawi and Sukamahi dam. Dry dam is designed to hold an excess water in times of flooding and allow water to move freely in normal conditions, in the future, its can be used to sediment and water quality control also. The concept is considered a long-term and permanent flood mitigation strategy. Benefit of this dam High maintenance is required especially after the event of a flood to remove debris and sediment deposits. Dry dam inundation area must be control strictly because when the area is not properly control, its will be occupying by habitant. Win Tr 20 has been chosen as the hydrological model that will represent the Upper Ciliwung watershed behavior. The production function of its model adopt the Soil Conservation Service Curve Number as we called SCS-CN. Consecutive rainfall will be applied by the rainfall distribution on the WIN TR 20. Flood routine with consecutive rainfall compute using level pool routine combine with spillway and bottom outlet. The objective of this study is to analyze the dry dam performance when the consecutive rainfall occurs during rainy season. The initial idea from this dry dam is to prolong the time lack before flood arrived in Jakarta to give sufficient time for evacuation. First Result from simulation with single design rainfall show that the Ciawi and Sukamahi increase the time lack of flood peak into downstream.
Original languageEnglish
Publication statusPublished - 2017
EventThe 15th International Conference on Quality in Research (QiR 2017) - ID, Bali, Indonesia
Duration: 1 Jan 2018 → …

Conference

ConferenceThe 15th International Conference on Quality in Research (QiR 2017)
CountryIndonesia
CityBali
Period1/01/18 → …

Keywords

  • Flooding; Dry Dam; Consecutive Rainfall; Flood Routine and Time Lack.

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