Potensi Penurunan Debit Banjir di Sungai Sepaku Akibat Pembangunan Bendungan Sepaku Semoi
Abstract
The high rainfall in the Sepaku DAS is one of the factors causing the flooding in the River Sepaku. The heavy rain often resulted in the flooding of residents' houses and public facilities. Less water reservoirs and unavailable sustainable drainage systems are some of the causes of flooding in the region. To address the flood problems, the government plans to build a dam to control flooding and increase the need for raw water in the Penajam Paser Utara district, especially in the Sepaku district. In line with this, research has been carried out to obtain a reduction in flood discharge due to the awakening of the Sepaku Semoi Dam. This study analyzed maximum daily rainfall data from the past decade, land cover and soil types, and flood discharge using HEC-HMS with validated results. The next step is the analysis of the flood water's high surface and the dam's area using the HEC-RAS program with 2D modeling. Modeling shows that Sepaku Semoi Dam reduces flood discharge, height, and volume. Drainage was decreased by 48,450%, flood height was lowered to 0.45 m, and volume was decreased by 5,080.8 m3. The flooded area also fell by 9,144 ha.
Downloads
Authors who publish with Extrapolasi agree to the following terms:
- Authors transfer the copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.. that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
- Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgement of its initial publication in this journal.
- Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See The Effect of Open Access)