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All Journal Indonesian Geotechnical Journal Riset Sains dan Teknologi Kelautan
Dede M. Sulaiman, Dede M.
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Environmental Science Industrial & Manufacturing Engineering

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PENANGGULANGAN KERUSAKAN PANTAI TERDAMPAK EROSI DENGAN PEMECAH GELOMBANG AMBANG RENDAH Nugroho, Cahyo Nur Rahmat; Larasar, Agustia A; Mathilda, Puty P; Gemilang, R.Indra; Sulaiman, Dede M.
Riset Sains dan Teknologi Kelautan Volume 1, Nomor 1, Tahun 2018
Publisher : Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/sensistek.v1i1.12303

Abstract

Keberhasilan penerapan bangunan Pemecah Gelombang Ambang Rendah (PEGAR), di luar syarat batas dan kriteriadesain struktur tersebut, sangat ditentukan oleh tata letak pemasangannya, yang meliputi tata letak vertikal danhorizontal. Tata letak vertikal terkait dengan posisi elevasi puncak struktur PEGAR terhadap permukaan laut, baikuntuk permukaan air laut rata-rata maupun untuk permukaan air laut tertinggi. Tata letak horizontal berkaitan denganpenempatan PEGAR dalam hal jarak optimal dari pantai ke posisi PEGAR, panjang struktur, dan lebar celah antaraPEGAR. Ketiga parameter ini menentukan limpasan dan terperangkapnya sedimen di belakang struktur ambangrendah tersebut. Makalah ini menyajikan ringkasan pengalaman lapangan yang berguna untuk pengembangan PEGARsebagai salah satu metode perlindungan pantai yang effektif. Tujuan pengembangan struktur ambang rendah ini adalahantara lain untuk membuat konsep pedoman pelaksanaan PEGAR sebagai struktur pantai yang disukai yang berlakuuntuk semua jenis bahan yang biasa digunakan dalam struktur perlindungan pantai.
Implementation of Sludge-Filled Geotextile Tubes as a Sustainable Coastal Protection Measure in Muddy Coastline Tiasundari, Nastiti; Harninto, Dandung Sri; Ady, Rizal Ansari; Sulaiman, Dede M.
Indonesian Geotechnical Journal Vol. 5 No. 1 (2026): Vol. 5, No. 1, April 2026
Publisher : Himpunan Ahli Teknik Tanah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56144/igj.v5i1.142

Abstract

Coastal erosion is one of the major challenges faced along the northern shoreline of Java Island. This phenomenon results in degradation of the coastline, threatening not only the local ecosystems but also the livelihoods of coastal communities. The soft, muddy coastal characteristics of this region make conventional hard-engineering structures less effective and unsustainable, prompting the need for alternate solutions. This study aims to evaluate the effectiveness of sludge-filled geotextile tubes (GI-Tubes) as an erosion control measure in muddy coastal areas. A field experiment was conducted using three GI-Tube units, each measuring 1.3 meters in height and 20 meters in length, installed parallel to the shoreline. The GI-Tubes were made from double-layered needle-punched staple fiber polypropylene non-woven geotextile and filled with locally sourced sludge mixed with flocculants to promote effective sediment floc formation within the tubes. The small opening size of the non-woven geotextile facilitated efficient dewatering while retaining the sludge inside. The outer layer of the GI-Tube provided high UV resistance and enhanced sediment-trapping capability, offering additional protection and extended durability. The double-layered design of the geotextile tubes enhances their overall structural integrity, enabling them to withstand hydrodynamic forces such as wave and coastal currents. After five months, a height reduction of approximately 0.4 meters was observed, likely due to settlement of the sludge filling. Monitoring conducted 2 years after installation indicated that the sludge fill remained solid and well-consolidated with no sign of damage, thereby confirming good performance of the structure. Satellite imagery analysis 40 months post installation indicated shoreline accretion accompanied by a significant expansion of mangrove growth, reaching up to 50 m beyond the initial vegetation line. These findings suggest that sludge-filled GI-Tubes can be an effective, low-cost, and sustainable solution for mitigating coastal erosion in soft-soil coastal environments.
Co-Authors Ady, Rizal Ansari Gemilang, R.Indra Harninto, Dandung Sri Larasar, Agustia A Mathilda, Puty P Nugroho, Cahyo Nur Rahmat Tiasundari, Nastiti