Rakhtim Akuba, Asep Huddiankuwera, Adri Raidyarto, irianto

Hydrological Study of The Remu River Flood Control System in Sorong City

Introduction

Hydrological study of the remu river flood control system in sorong city. Design an effective flood control system for Sorong City's Remu River. This study uses HEC-HMS/RAS to propose embankments, sheet piles, reservoirs, and dams, mitigating annual flooding losses.

Abstract

Sorong City is located in West Papua Province and is known as one of the most active cities on Papua Island, due to its abundant natural resources. However, the Remu River, which flows through the city, is one of the main causes of annual flooding, resulting in significant social and economic losses. This study aims to design an effective flood control system for the Remu River through river integration, in order to increase its flow capacity to accommodate a larger water discharge. The proposed plan includes the construction of embankments and sheet piles along the riverbanks, as well as the development of reservoirs and dam structures as flood mitigation measures. Hydraulic modelling was carried out using HEC-HMS and HEC-RAS software. In the HEC-RAS modelling, a one-dimensional approach was used to compare the flood water level with the elevation of the riverbanks. The modelling results identify river sections that are prone to overflow and guide the planning of embankments and sheet piles, which are adjusted based on the spatial constraints observed in the field.

Review

This study addresses a highly pertinent issue concerning the annual flooding of the Remu River in Sorong City, West Papua, a region characterized by significant economic activity and natural resources. The abstract clearly articulates the problem of recurrent flooding, leading to substantial social and economic losses, thereby establishing the critical need for effective intervention. The stated aim to design an effective flood control system through "river integration" to increase flow capacity is commendable, suggesting a comprehensive approach to mitigating this persistent environmental hazard and providing practical solutions for a pressing urban challenge. The methodology employed involves hydraulic modeling using industry-standard software, HEC-HMS and HEC-RAS, which lends credibility to the technical approach. The specific application of HEC-RAS for one-dimensional analysis to compare flood water levels with riverbank elevations is a practical step towards identifying critical overflow sections. The proposed solutions are concrete and include the construction of embankments, sheet piles, reservoirs, and dam structures as flood mitigation measures. Importantly, the abstract highlights how the modeling results directly inform the planning of these structural measures, with adjustments made based on observed spatial constraints, indicating a pragmatic and site-specific design process tailored to the local conditions. While the abstract provides a solid overview of the problem, methodology, and proposed solutions, a crucial aspect that the full paper should elaborate upon is the quantitative assessment of the *effectiveness* of these proposed measures in terms of flood reduction or achieved increase in flow capacity. It would strengthen the study to explicitly state whether the models were used to simulate the post-intervention flood levels or the actual reduction in flood risk. Furthermore, while "river integration" is mentioned, the abstract primarily details structural interventions; expanding on any non-structural or broader environmental/social considerations within this integrated approach would be beneficial. Overall, this study presents a practical and well-grounded approach to a significant local issue, offering valuable insights into developing tangible flood mitigation strategies, and is likely to be of considerable interest to practitioners and policymakers in urban hydrology.

Full Text

Comments

You need to be logged in to post a comment.