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Analysis of Structural and Non-Structural Disaster Mitigation Due to Erosion in the Timbulsloko Village, Demak – Central Java
 
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1
Oceanography Department, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro, Jl. Prof. Soedarto SH Tembalang Semarang, 50275, Indonesia
2
Laboratorium Ocean Modelling and Climate Change-UPT Integrated Laboratory, Universitas Diponegoro, Jl. Prof. Soedarto SH Tembalang, Semarang, 50275, Indonesia
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Center for Coastal Disaster Mitigation and Rehabilitation Studies, Universitas Diponegoro, Jl. Prof. Soedarto SH Tembalang, Semarang, 50275, Indonesia
4
Civil Engineering Department, Faculty of Engineering, Universitas Diponegoro, Jl. Prof. Soedarto SH Tembalang Semarang, 50275, Indonesia
CORRESPONDING AUTHOR
Denny Nugroho Sugianto   

Oceanography Department, Faculty of Fisheries and Marine Sciences, Universitas Diponegoro, Jl. Prof. Soedarto SH Tembalang Semarang, 50275, Indonesia
Publication date: 2022-02-01
 
J. Ecol. Eng. 2022; 23(2):246–254
 
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ABSTRACT
Timbulsloko is a village on the coast of Sayung District, Demak Regency that is severely affected by coastal erosion. Coastal erosion in Timbulsloko Village is mainly caused by the removal of mangrove areas which has eliminated the function of the natural breakwater for the coast of Timbulsloko Village. This study aims to mitigate coastal erosion in the form of structural and non-structural protection. Structurally (physically), mitigation is conducted by protecting the coastal area with the application of environmentally friendly coastal protection technology in the form of a Permeable breakwater with a Hybrid Engineering structure. Furthermore, the effectiveness of two different structure segments in damping waves from September 2020 – March 2021 will be measured. While non-structurally, mitigation is conducted in a non-physical way by analyzing the Coastal Vulnerability Index of Timbulsloko Village based on the parameters of Coastal Typology, Average Tidal Range, Significant Wave Height, Coastal Slope, Coastal Geomorphology, Sea Level Rises, and Shoreline Displacement using the CVI method. The effectiveness of the permeable structure’s wave damping is determined by the initial wave height and transmission wave height measured by the ultrasonic sensor. Based on segment differences, the Permeable Breakwater Segment 2 with a distance between bamboo of 0.25 m has better effectiveness than a Permeable Breakwater Segment 1 with a distance between bamboo of 0.5 m. The results of the Coastal Vulnerability Analysis show that Timbulsloko Village is vulnerable to coastal disasters, especially coastal erosion.