PLANNING OF COASTAL PROTECTION STRUCTURES IN THE COASTAL AREA OF AMPENAN DISTRICT, MATARAM CITY, WEST NUSA TENGGARA PROVINCE

• Main Author: Nawafil, Husnul
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/85537
• Institution: Institut Teknologi Bandung

Indonesia is the largest archipelagic country in the world, with a coastline stretching 99,093 km. This length ranks as the second longest coastline in the world after Canada. This is the reason why almost all of Indonesia's population lives in coastal areas and utilizes the beach areas for their livelihood. However, one location experiencing abrasion is in the city of Mataram, West Nusa Tenggara Province, specifically the coastal area of Ampenan District. According to a study by BAPPEDA Mataram City in 2019, the coastline of Mataram City has been gradually receding between 2006 and 2017. To address this issue, it is necessary to plan coastal protection structures. A simple criteria assessment was conducted on several alternatives for coastal protection structures, including detached breakwaters, revetments, and groins. The suitable structure was determined to be the detached breakwater. The breakwater is placed 42 meters from the coastline with a configuration of 8 units, spaced 22 meters apart, and a breakwater length of 135 meters. The breakwater structure consists of an armor layer made of tetrapods and a core composed of natural stones. The dimensions of the breakwater structure are calculated based on the Shore Protection Manual Volume II and The Rock Manual.