Economic Feasibility Study Biforcation Development and Toili River Flood Control Banggai District

• Published in: IOP conference series. Earth and environmental science 2022-11, Vol.1075 (1), p.12037
• Main Authors: Nirmalawati, Sutapa, I W
• Format: Article
• Language: English
• Subjects: Analytical methods; Benefit Cost Ratio (BCR); Biforkasi; feasibility analysis; Feasibility studies; Flood control; Floods; Interest rates; Irrigation water; Mathematical analysis; Net present value; Net Present Value (NPV); Rivers; Security; Water supply
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/1075/1/012037

The Biforcation Structure which is located at the branching of the Moilong and Mansahang Rivers, Banggai District functions as a weir at the Moilong Free Intake and distributes water proportionally to its downstream, so that it can function as a flood control structure and at the same time supply water to the Mansahang (Toili) Weir. The flood incident on June 18, 2019 resulted in the collapse of the Biforcation structure so that it submerged seven villages in Moilong District. The restructure of the Biforcation is very much needed by the community to provide a sense of security from the destructive power of water and irrigation water supply. To prepare for the development, a research was conducted with the aim of knowing the economic feasibility of the construction of the Biforcation and the flood conrol structure. Prior to construction, a study was conducted with the aim of determining the economic feasibility of the Biforcation construction and the flood control structure. The research method used analytical methods, quantitative approaches, and conducted interviews with the relevant agencies. The data obtained are reviewed and analyzed using several assumptions of loan interest rates, and loan times. Calculation of financial analysis using the calculation of Net Present Value (NPV) and Benefit Cost Ratio (BCR). The results of the study concluded that the construction ldingof Biforcation structures and flood control structures was feasible. The results of the Net Present Value (NV) are positive at 10% and 12% interest rates. Interest 10%, benefit Cost Ratio (BCR) 6,536 (12 years), BCR 5,675 (10 years), BCR 4,633 (8 years). Interest 12%, Benefit Cost Ratio (BCR) 5,798 (12 years), Benefit Cost Ratio (BCR) 5,097 (10 years) Benefit Cost Ratio (BCR) 4,219 (8 years).