INVESTIGATING RAINWATER INFILTRATION AND DRAINAGE IN UJUNG KALAK VILLAGE, WEST ACEH

Abstract

Flood inundation is a critical issue faced by urban areas, particularly in densely populated regions. This study focuses on the Johan Pahlawan District, a sub-district within the West Aceh Regency, encompassing a rapidly growing urban area with a population of 4243. As settlements expand due to the increasing population, the demand for waterways also rises, impacting drainage systems and causing potential flooding and inundation. The inability of the existing drainage system to handle excessive water flow during heavy rainfall exacerbates the problem.

The research examines the specific drainage problem at Simpang Pelor, Iskandar Muda Road, Ujung Kalak Village, where heavy rain with an intensity of 2 hours and an average height of 20 cm to 40 cm results in recurrent flooding during the rainy season. Main roads, residential areas, and shops are submerged, affecting the overall functioning and safety of the community. Despite the recurrent nature of these floods, no previous evaluation of the drainage profile in Ujung Kalak Village has been conducted.

This study aims to evaluate the drainage system in Ujung Kalak Village to understand its capacity, limitations, and shortcomings. By analyzing the drainage infrastructure, including artificial and natural drainage systems, the research seeks to identify the root causes of the flooding problem. Additionally, the study will explore the factors contributing to reduced water absorption into the soil, leading to increased surface runoff during heavy rainfall.

The evaluation results will be of great significance to the Office of Water Resources, providing valuable information and data for future drainage studies. The recommended corrective actions based on this research will aid in enhancing the drainage system's efficiency and resilience against flooding, benefiting the urban population in Johan Pahlawan District.