Analysis Of Flood Discharges With Synthetic Unit Hydrograph Methods In Batanghari Leko River, Batanghari Leko District

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Introduction

The Batanghari River Leko, a tributary of the Musi River, is prone to overflowing, resulting in frequent flooding in the surrounding settlements during periods of high rainfall. This phenomenon poses a significant concern, particularly in the effort to plan effective flood control and ensure the security of river flows. To achieve this, it is crucial to determine the flood discharge plan that can be produced from the river. This study employs an empirical method that relies on data from three rainfall measurements. The data is then analyzed to determine the flood discharge using three synthetic unit hydrograph methods (HSS), namely HSS Nakayasu, HSS Snyder, and HSS Gamma I.

Background of the Study

The Batanghari River Leko is a vital watercourse that supports the livelihoods of numerous communities in the surrounding areas. However, the frequent flooding caused by the river's overflowing poses a significant threat to the lives and properties of these communities. The flooding is often exacerbated by the high rainfall in the region, which can lead to devastating consequences. Therefore, it is essential to develop effective flood control measures to mitigate the impact of flooding in the area.

Methodology

The study begins with collecting data on the intensity of rainfall per hour from the existing rain station. This data serves as a crucial parameter in calculating flood discharge using the three HSS methods. The data is then analyzed to determine the flood discharge using the three HSS methods. The results of the analysis are compared to determine the most accurate method for calculating flood discharge.

Results and Discussion

The results of the analysis show a significant difference in the peak flood discharge of the three methods. For example, the results of the peak discharge of the Nakayasu synthetic hydrograph flood reached 1219,041 m³/second at 16,973 hours. Meanwhile, HSS Snyder showed a much higher discharge of 4707.91 m³/second at 21 hours, and HSS Gamma I showed 395,461 m³/second at 5 hours. The results indicate that HSS Nakayasu gives the closest results to the real picture of the flood discharge that will occur in the Batanghari River.

Importance of Choosing the Right Method

The results of the study highlight the importance of choosing the right method in the calculation of flood discharge for flood control planning. The use of accurate rainfall historical data and modeling in accordance with local conditions will determine the success in designing the structure of water buildings and drainage systems that can minimize the impact of flooding. In the context of the Batanghari Leko River, the results obtained from the HSS Nakayasu method can be an important reference for decision makers in designing more effective flood risk management strategies.

Conclusion

The study demonstrates the effectiveness of the HSS Nakayasu method in calculating flood discharge in the Batanghari Leko River. The results of the study can be used as a reference for decision makers in designing more effective flood risk management strategies. The study also highlights the importance of choosing the right method in the calculation of flood discharge for flood control planning. By using accurate rainfall historical data and modeling in accordance with local conditions, it is possible to design effective flood control measures that can minimize the impact of flooding.

Recommendations

Based on the results of the study, the following recommendations are made:

  • The HSS Nakayasu method should be used as the primary method for calculating flood discharge in the Batanghari Leko River.
  • Accurate rainfall historical data and modeling in accordance with local conditions should be used in designing the structure of water buildings and drainage systems.
  • Decision makers should use the results of the study as a reference in designing more effective flood risk management strategies.

Limitations of the Study

The study has several limitations, including:

  • The study relies on data from three rainfall measurements, which may not be representative of the entire region.
  • The study uses a simplified model of the river flow, which may not accurately represent the complex dynamics of the river.
  • The study does not account for the impact of human activities on the river flow.

Future Research Directions

The study suggests several future research directions, including:

  • Conducting a more comprehensive study that includes data from multiple rainfall measurements and a more complex model of the river flow.
  • Investigating the impact of human activities on the river flow and its effect on flood discharge.
  • Developing more effective flood control measures that can minimize the impact of flooding.

Conclusion

In conclusion, the study demonstrates the effectiveness of the HSS Nakayasu method in calculating flood discharge in the Batanghari Leko River. The results of the study can be used as a reference for decision makers in designing more effective flood risk management strategies. The study also highlights the importance of choosing the right method in the calculation of flood discharge for flood control planning. By using accurate rainfall historical data and modeling in accordance with local conditions, it is possible to design effective flood control measures that can minimize the impact of flooding.

Q: What is the Batanghari River Leko, and why is it prone to flooding?

A: The Batanghari River Leko is a tributary of the Musi River, and it is prone to flooding due to its high rainfall and overflowing. The frequent flooding poses a significant threat to the lives and properties of the communities in the surrounding areas.

Q: What are synthetic unit hydrograph methods (HSS), and how are they used in flood discharge calculations?

A: Synthetic unit hydrograph methods (HSS) are empirical methods used to calculate flood discharge. They rely on data from rainfall measurements and use mathematical models to determine the flood discharge. The three HSS methods used in this study are HSS Nakayasu, HSS Snyder, and HSS Gamma I.

Q: What are the results of the flood discharge calculations using the three HSS methods?

A: The results of the flood discharge calculations show a significant difference in the peak flood discharge of the three methods. HSS Nakayasu gives the closest results to the real picture of the flood discharge that will occur in the Batanghari River.

Q: Why is it important to choose the right method in the calculation of flood discharge for flood control planning?

A: The use of accurate rainfall historical data and modeling in accordance with local conditions will determine the success in designing the structure of water buildings and drainage systems that can minimize the impact of flooding. In the context of the Batanghari Leko River, the results obtained from the HSS Nakayasu method can be an important reference for decision makers in designing more effective flood risk management strategies.

Q: What are the limitations of the study, and what are the future research directions?

A: The study has several limitations, including the reliance on data from three rainfall measurements and the use of a simplified model of the river flow. Future research directions include conducting a more comprehensive study that includes data from multiple rainfall measurements and a more complex model of the river flow.

Q: What are the recommendations of the study, and how can they be applied in practice?

A: The study recommends the use of the HSS Nakayasu method as the primary method for calculating flood discharge in the Batanghari Leko River. Accurate rainfall historical data and modeling in accordance with local conditions should be used in designing the structure of water buildings and drainage systems. Decision makers should use the results of the study as a reference in designing more effective flood risk management strategies.

Q: How can the results of the study be used to protect the community around the river and existing infrastructure?

A: The results of the study can be used to design more effective flood risk management strategies that can minimize the impact of flooding. By using accurate rainfall historical data and modeling in accordance with local conditions, it is possible to design effective flood control measures that can protect the community around the river and existing infrastructure.

Q: What are the potential applications of the study in other areas?

A: The study has potential applications in other areas where flood control planning is a concern. The use of synthetic unit hydrograph methods (HSS) can be applied in other rivers and watercourses to determine flood discharge and design effective flood control measures.

Q: What are the future implications of the study, and how can they be addressed?

A: The study has future implications for flood control planning and management in the Batanghari Leko River and other areas. The results of the study can be used to design more effective flood risk management strategies that can minimize the impact of flooding. However, the study also highlights the importance of choosing the right method in the calculation of flood discharge for flood control planning, and future research directions should focus on addressing this issue.