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Analisis Tingkat Kerentanan terhadap Penurunan Tanah (Land Subsidence) berdasarkan Kondisi Hidrogeologi dan Mitigasinya di Daerah Pesisir Cekungan Air Tanah Jakarta Hakkina, Delano Ichsan; Putranto, Thomas Triadi; Setiawan, Taat
Jurnal Lingkungan dan Bencana Geologi Vol 14, No 3 (2023)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v14i3.491

Abstract

Penurunan tanah telah menjadi bahaya yang signifikan bagi kota-kota besar di Indonesia, termasuk wilayah perkotaan besar di daerah pesisir cekungan air tanah (CAT) Jakarta. Kondisi geologi daerah pesisir cekungan air tanah Jakarta umumnya terdiri atas endapan aluvial dan formasi litologi berumur muda, sehingga menjadikan wilayah ini rentan terhadap penurunan tanah akibat kompaksi alami pada lapisan lempung (akuitar). Adanya pengambilan air tanah yang tinggi serta aktivitas pembangunan oleh manusia telah menjadikan resiko bahaya penerunan tanah di cekungan air tanah Jakarta meningkat. Penelitian ini bertujuan untuk mengetahui penyebab utama dan persebaran zona kerentanan penurunan tanah untuk menentukan strategi mitigasi di daerah pesisir cekungan air tanah Jakarta. Metode yang digunakan adalah skoring dan tumpang tindih dengan menggunakan parameter tebal lempung-lempung pasiran, kedalaman muka air tanah tertekan, dan jenis tata guna lahan yang telah diberikan bobot berdasarkan metode Analytical Hierarchy Process (AHP). Hasil penggabungan ketiga parameter akan menghasilkan peta sebaran tingkat kerentanan penurunan tanah. Didapatkan bahwa wilayah barat laut dan tengah daerah penelitian termasuk ke dalam zona kerentanan rendah (3,9%), wilayah timur, selatan, dan barat laut masuk ke dalam zona kerentanan sedang (44,5%), serta wilayah utara, tengah, dan tenggara masuk ke dalam zona kerentanan tinggi (51,5%). Upaya mitigasi yang dapat direkomendasikan adalah dengan melakukan pemantauan kondisi air tanah dan penurunan muka tanah jangka panjang, investigasi dan pembaharuan data hidrogeologi dan geologi teknik bawah permukaan, melakukan penelitian yang lebih spesifik terkait penurunan tanah pada daerah yang rentan/terdampak penurunan tanah, serta penggunaan data penelitian sebagai pertimbangan dalam penentuan kebijakan administratif.
Analisis Pengaruh Sebaran Litologi Terhadap Hidrogeokimia pada Akuifer Bebas Cekungan Air Tanah (CAT) Jakarta Hartanto, Fandika Virgiawan; Putranto, Thomas Triadi; Setiawan, Taat
Jurnal Lingkungan dan Bencana Geologi Vol 14, No 3 (2023)
Publisher : Badan Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34126/jlbg.v14i3.495

Abstract

Penelitian ini dilakukan di Cekungan Air Tanah (CAT) Jakarta yang terletak di provinsi DKI Jakarta, Jawa Barat, dan Banten. Air tanah bebas merupakan air tanah yang paling mudah dipengaruhi oleh proses-proses kimia baik berupa evaporasi, air hujan, pengaruh dari air laut, litologi, ataupun pengaruh antropogenik. Permasalahan yang sering terjadi adalah berupa ketidaktahuan mengenai perubahan fasies tersebut, terutama litologi. Geologi yang terdapat pada Cekungan Air tanah (CAT) Jakarta ini cukup banyak berupa Tuff Banten (QTvb), Kipas Alluvial (Qav), Endapan Pematang Pantai (Qbr), dan Endapan Alluvial (Qav) yang mampu mempengaruhi perubahan fasies air tanah tersebut. Tujuan dari penelitian ini adalah untuk mengetahui perubahan fasies dan pengkelasan air tanah serta kondisi kimiawi air tanah pada CAT Jakarta terhadap pengaruh kondisi litologi. Metode yang digunakan dalam penentuan klasifikasi fasies air tanah ini adalah data kimia air tanah sejumlah 66 sampel pada akuifer bebas Cekungan Air Tanah (CAT) Jakarta dan kemudian dilakukan analisis sifat fisik dan kimia air. Pada sifat kimia, sampel air memliki pH yang berkisar antara 5,8 hingga 9,5, nilai DHL berkisar antara 53-5.020 μS/cm, dan nilai TDS berkisar antara 56-3.363 mg/L. Berdasarkan hasil analisis fasies air tanah yang terklasifikasi pada diagram piper berupa fasies CaHCO3, NaHCO3, MgHCO3, dan NaCl. Perubahan fasies air tanah dipengaruhi oleh adanya proses interaksi pertukaran anion dan kation dengan litologi dan pencampuran ataupun pencucian air tanah oleh air hujan pada Cekungan Air Tanah Jakarta dimana hal tersebut menggambarkan proses kimia air tanah yang terbentuk cenderung ke arah evaporasi dan transportasi yang disebabkan oleh proses rock dominance.
Groundwater Potential of the Jakarta Groundwater Basin using the Darcy Equation Method Imsak Aditya Respati Priyono; Thomas Triadi Putranto; Taat Setiawan
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 2 (2024): July 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i2.404-418

Abstract

The annual increase in population leads to a growing demand for water. To control groundwater utilization in a directed manner is to extract groundwater according to groundwater potential. The research aims to analyze the groundwater potential in the Jakarta Groundwater Basin in terms of quantity and quality. The method used is primary data analysis by determining quantity potential using the Darcy equation method with additional calculations of groundwater volume and quality potential based on drinking water quality standards from the Republic of Indonesia Minister of Health Regulation no. 2 of 2023 and WHO of 2022. The dynamic potential for unconfined aquifers ranges from 2,663–1,372,901 m³/year, while for confined aquifers range from 184,991–1,895,288 m³/year. The static potential for unconfined aquifers ranges from 266,852–3,252,654 m³, while for confined aquifers ranges from 1,317,862–30,620,266 m³. Based on groundwater quality standards for drinking water from the Minister of Health and WHO for the parameters pH, TDS, Na⁺, Cl⁻, SO₄²⁻ and NO₃⁻, there are 15 samples from 53 samples of unconfined aquifer and 36 samples from 75 samples of confined aquifer that meet standards.
Discovery of Marine Macrozoobenthos Fossils in the River of Wonocolo Geosite, Indonesia Rahmawati, Laily Agustina; Afiati, Norma; Putranto, Thomas Triadi
Indonesian Journal of Geography Vol 56, No 3 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.94716

Abstract

Wonocolo Geosite is a geoheritage known for the existence of the Kawengan Anticlinal Trap, which is the only one in the world, causing oil to be found in shallow locations. This condition has allowed for traditional mining since the Dutch colonial era and continues today. Geological history states that the anticlinal structure was formed when the Indo-Australian plate collided with the Eurasian plate, resulting in folds and uplift of the seafloor above the surface. However, there has not been much research supporting the truth of the theory. Therefore, evidence is needed to support the uniqueness of the Wonocolo Geosite. The fossil collection method was carried out simultaneously with the collection of substrates at the upstream, middle, and downstream riverbeds using 20 cm diameter PVC pipes at a depth of 10 cm.This study found marine macrozoobenthos fossils during substrate sampling in the upstream, middle, and downstream river beds using a PVC pipe with a diameter of 20 cm at a depth of 10 cm.  The samples were then identified in the laboratory, revealing fossils from the deep sea. The fossils found include Azooxanthellate (Cnidaria), which lives at depths of up to 2000 m; Dentaliida (Mollusca) which lives at depths of 500-7000 m and Foraminifera which also live in the deep sea. This phenomenon is unusual, considering that the fossils were found in a river far from the sea at an altitude of 250 MASL. Therefore, the discovery of marine macrozoobenthos fossils at the bottom of the Wonocolo River strengthens the theory of the formation of the Wonocolo Formation from a raised seabed which is also an important asset supporting the Wonocolo Geoheritage.
Analysis of Lithology Influence on the Coliform Distribution in Semarang City Umar, Savikri Misbahul; Putranto, Thomas Triadi; Pangestuti, Dina Rahayuning; Susanto, Novie; Santi, Narulita
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 21, No 3 (2024): November 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v21i3.838-851

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The amount of available water is becoming more scarce due to increased human demand. As a result, people are now obtaining their water from limited aquifers or deep groundwater from artesian water sources. Nonetheless, the varied properties of the soil and rocks within it do not ensure that the groundwater's quality remains safe from microorganisms or germs. Coliform, one of the bacteria or microorganisms that can increase in groundwater due to variations in the rock lithologies found in different regions. Analysis of coliform bacteria distribution was carried out in 30 drilled wells from confined aquifers spread across the city of Semarang. This research identified total coliforms using the Most Probable Numbers (MPN) method. The presence of coliform bacteria in certain wells was compared with the characteristics of rocks, where in this study area there are several rock lithologies such as volcanic breccia, andesite, pyroclastic breccia, lava, and clay. As for the results of this analysis, it was found that 10% of the samples contained total coliforms that exceeded the maximum limit of 50 CFU/100 ml, where the lithology with the highest total coliform content was found in the basalt area with the highest results, namely TNTC (Too Numerous to Count).
Identification of Lead Contamination in the Food Chain and Environment Surrounding Breastfeeding Mothers in Highland Agricultural Areas Pangestuti, Dina Rahayuning; Kartini, Apoina; Suhartono, Suhartono; Lisnawati, Naintina; Putranto, Thomas Triadi; Susanto, Novie
JURNAL KESEHATAN LINGKUNGAN Vol. 17 No. 1 (2025): JURNAL KESEHATAN LINGKUNGAN
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jkl.v17i1.2025.22-30

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Introduction: Lead in the environment can be more easily absorbed by individuals with nutritional deficiencies, particularly breastfeeding mothers residing in agricultural areas near lead sources. Contaminated breast milk can disrupt infants' growth and development. This study aims to identify lead contaminants in the environment and assess the nutritional status of breastfeeding mothers to provide preventive measures. Methods: This cross-sectional study was conducted in the highland agricultural area of Semarang Regency in October 2021. Environmental samples, including air from agricultural land, settlements, groundwater, and raw food were carried out as environmental samples from 31 breastfeeding mothers. Dietary intake, haemoglobin, MCV, MCH, MCHC, and lead levels in breast milk was carried out. Lead content was analysed using ICP-OES. Geographic information system (GIS) was used to compare spatial distribution lead status levels with identified exposure factors. Results and Discussion: Median age of breastfeeding mothers was 24 years, with 72% being housewives, having a senior high school education. Median age of the infants was 2.5 months, 32% being boys, and 48% were exclusively breastfed. Mean hemoglobin level of the mothers was 13 ± 1.4 g/dL (13.8% was anemic) and median lead level in breast milk was 0.019 ppm. None of the mothers met their recommended macro- and micronutrient intake. Lead content in foods was 0.02-0.180 ppm, groundwater 0.017-0.034 ppm, and air 0-1.56 μg/Nm3 over a three-hours. Conclusion: The environment surrounding breastfeeding mothers contains lead, particularly in the air, and these mother experiences nutritional deficiencies, thereby increasing the risk of lead absorption.
Microbiological Study of Escherichia Coli Contamination in Dug Wells in Demak District, Central Java Santi, Narulita; Fanny, Celsy Miftaqul Tiara; Pangestuti, Dina Rahayuning; Putranto, Thomas Triadi; Putri, Maya Aiko Salsabila
JURNAL GEOCELEBES Vol. 9 No. 1: April 2025
Publisher : Departemen Geofisika, FMIPA - Universitas Hasanuddin, Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70561/geocelebes.v9i1.43184

Abstract

Demak Regency is a peri-urban area in Java experiencing an increasing demand for clean water due to population growth and development. Groundwater is the primary source to meet this demand, although its quality is often threatened by pollution from household waste and unprotected septic tanks. This study aims to evaluate groundwater quality in Demak District with the Escherichia coli presence parameter in unconfined aquifers using a GIS-based spatial approach and IDW interpolation method. The geology of the study area includes sandstone, carbonate mudstone, and alluvium lithologies, with most regions having flat slopes. The hydrogeological potential of the study area shows diverse aquifer productivity, with groundwater levels ranging from 0.3–41 meters. The results of the groundwater quality analysis in the study area showed that 47% of the samples exceeded the safe limit for Escherichia coli by Ministry of Health Number 2 Year 2023. The shallow depth of the groundwater table and poor well construction allow the infiltration of contaminants from the land surface into the groundwater, especially from polluting sources around the well. This study provides an essential overview of groundwater quality in the Demak District, which can support sustainable groundwater management and improved sanitation to improve public health.
Isotope Analysis of 18O and 2H: A Coastal Confined Aquifer Case Study Nugraheni, Vania Salsabila Anabel; Santi, Narulita; Putranto, Thomas Triadi; Marin, Jenian; Hidayatillah, Ahmad Syauqi
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 3 (2025): November 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i3.909-921

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In 2023, groundwater quality in Semarang declined due to excessive extraction, leading to land subsidence and reduced groundwater availability. Prolonged dry seasons caused drought in ten villages across five sub-districts. This study aims to investigate geological conditions, groundwater flow patterns, and the spatial distribution of pH, TDS, hardness, electrical conductivity, and major ions (Na⁺, Ca²⁺, Cl⁻, and HCO₃⁻). Additionally, it seeks to interpret groundwater evolution through Gibbs diagram analysis and identify groundwater origins using stable isotopes (¹⁸O and ²H). The methodology involves stable isotope analysis to trace groundwater sources and evaluate d-excess values, which are linked to drought conditions and recharge mechanisms. Water chemistry analysis was performed to characterize ion concentrations, while the Gibbs diagram was used to identify the dominant geochemical processes influencing groundwater. The study area comprises claystone, marl, sandstone, volcanic breccia, and alluvium, with 60 sampling points spanning Upper and Lower Semarang. Water types identified include NaHCO₃, NaCl, CaHCO₃, MgHCO₃, and NaSO₄. NaHCO₃ was the most common, followed by NaCl and CaHCO₃. Isotope analysis revealed several points with d-excess <10 (e.g., SB-10L, SB-20L, SA-4, SA-8, SA-29), indicating groundwater recharge from modern rainfall, typically characterized by d-excess values >10. 
Identifikasi Karakteristik Zona Prospek Timah Primer Berdasarkan Pemetaan Geologi Permukaan dan Analisis Geokimia Daerah Kelapakampit dan Sekitarnya, Kabupaten Belitung Timur, Provinsi Bangka Belitung Noorbasith Al Fajri; Putranto, Thomas Triadi; Ali, Rinal Khaidar
Jurnal Geologi dan Sumberdaya Mineral Vol. 26 No. 2 (2025): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v26i2.823

Abstract

Kepulauan Bangka Belitung memiliki potensi timah yang besar baik timah primer dan timah sekunder. Akan tetapi timah primer belum dimanfaatkan secara optimal dibandingkan timah sekunder sehingga perlu dilakukan penelitian secara lebih lanjut. Penelitian ini dilakukan di Kelapakampit dan sekitarnya, Kabupaten Belitung Timur. Tujuan dari penelitian ini yaitu. mengetahui kondisi geologi dan zona prospek endapan timah primer di daerah penelitian. Metode penelitian yang dilakukan yaitu pemetaan geologi permukaan, analisis geomorfologi, struktur geologi, petrologi, petrografi, mineragrafi, X-Ray Difraction (XRD), dan X-Ray Fluorescence (XRF). Berdasarkan hasil analisis diketahui geomorfologi daerah penelitian terdiri dari berbukit bergelombang-berbukit terjal struktural dan bergelombang miring-landai struktural. Daerah penelitian terdiri dari 2 satuan litologi yaitu metabatupasir dan batupasir. Struktur yang berkembang di daerah penelitian berupa kekar tarik, kekar gerus, kelurusan, dan indikasi sesar. Tipe alterasi hidrotermal di daerah penelitian termasuk kedalam eksogreisen dan argilisisasi. Mineralisasi yang berkembang di daerah penelitian termasuk dalam tipe endapan urat kuarsa-kasiterit dan sulfida-kasiterit. Mineralisasi timah dicirikan dengan hadirnya mineral kasiterit yang berasosiasi dengan beberapa mineral sulfida. Berdasarkan analisis geokimia XRF, nilai Sn pada sampel batuan menunjukkan rentang dari 115,5-727,7 ppm dan sampel streams sediment menunjukkan rentang 51 130.800 ppm. Zona prospek timah primer terdapat pada bagian tengah dan barat laut daerah penelitian. Ditemukan anomali Pb dengan rentang 5.080 - 173.590 ppm dan Zn dengan rentang 1.680 - 2.040 ppm. Kata Kunci: Belitung, Timah Primer, Mineralisasi, Zona Prospek Abstract The Bangka Belitung Islands have great tin potential, both primary and secondary tin. However, primary tin has not been utilized optimally compared to secondary tin, so further research is needed. This research was conducted in Kelapakampit and its surroundings, East Belitung Regency. The purpose of this study is to determine the geological conditions and the prospective zones of primary tin deposits in the study area. The research methods applied include surface geological mapping, geomorphological analysis, geological structure studies, petrology, petrography, mineragraphy, X-Ray Diffraction (XRD), and X-Ray Fluorescence (XRF). Based on the analysis results, it is known that the geomorphology of the study area consists of rolling hills to steep structural hills and gently sloping structural undulating areas. The study area consists of 2 lithology units, namely metasandstone and sandstone. The structures developed in the study area include tension joints, shear joints, lineaments, and indications of faults. The types of hydrothermal alteration in the study area include exogreisen and argillization. Mineralization developed in the study area belongs to the type of quartz-cassiterite vein deposits and cassiterite-sulfide deposits. Tin mineralization is characterized by the presence of cassiterite mineral associated with several sulfide minerals. Based on XRF geochemical analysis, Sn values in rock samples range from 115.5–727.7 ppm, and stream sediment samples range from 51–130,800 ppm. The primary tin prospect zone is located in the central and northwest parts of the study area. An anomaly of Pb was found with a range of 5.080 - 173.590 ppm and Zn with a range of 1.680 - 2.040 ppm. Keywords: Belitung, Primary Tin, Mineralization, Prospect Zone
Potensi Erosi Buluh Akibat Mata Air Pada Bendungan (Studi Kasus : Bendungan Titab) Anggara, I Putu Hariawan; Sachro, Sri Sangkawati; Putranto, Thomas Triadi
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 27, Nomor 2 (2021)
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (779.077 KB) | DOI: 10.14710/mkts.v27i2.40192

Abstract

Bendungan merupakan salah satu infrastruktur keairan yang dapat difungsikan sebagai konservasi,pemanfaatan, dan pengendalian daya rusak air. Bendungan Titab merupakan salah satu bendungan diIndonesia yang memiliki multifungsi sebagai air irigasi, air baku dan PLTA. Bendungan ini merupakan tipebendungan urugan batu dengan inti tegak yang memiliki panjang puncak 210 m, lebar 12 m, dan tinggi 78 mdari pondasi terdalam. Bendungan ini dibangun dengan kondisi geologi yang relatif kompleks dan terjadilongsoran pada dinding pelimpah dan ditemukan mata air pada longsoran sehingga perlu dilakukan analisisterhadap potensi piping akibat adanya mata air. Penelitian ini mengkaji potensi terjadinya erosi buluh (piping)akibat pengaruh mata air yang ada di dekat bendungan. Kajian dilakukan berdasarkan pengamatan instrumenselama masa penggenangan Tahun 2016 hingga Tahun 2019. Analisis dilakukan dengan menghitung kriteriapenerimaan (KP) rembesan dan indeks rembesan (Qi) untuk mengetahui perilaku rembesan pada tubuhbendungan dan dilakukan analisis faktor keamanan (FK) terhadap bahaya piping dengan membandingkangradien hidrolik berdasarkan pembacaan instrumen pisometer dan gradien hidrolik material inti tubuhbendungan. Berdasarkan hasil perhitungan kriteria penerimaan rembesan dan indeks rembesan menunjukkanrembesan yang terjadi pada Bendungan Titab tidak aman karena melebihi persyaratan, rembesan rata-rataterjadi sebesar 6,350 > 0,56 liter/menit/m dan Qi > 1. Namun analisis terhadap FK bahaya piping masih amanyaitu sebesar 8,390 > 4.
Co-Authors Agus Harjanto Aisyah Nur Isneni Aji Bagas Putro Anggara, I Putu Hariawan Anik Sarminingsih, Anik Annita Kusuma Wardhani Apoina Kartini Arizatur Reza Wicaksono Aska Zakiya Asri Cahaya Hati Axel Prima Agita Susanta Daniel Setiawan Dedi Hermawan Devina Trisnawati Dhana Hastuti Dina Rahayuning Pangestuti Dina Rahayuning Pangestuti, Dina Doni Prakasa Eka Putra Fadilah, Amar Jihad Fanny, Celsy Miftaqul Tiara Firza Syarifa Zahra Firza Syarifa Zahra Fuad Muhammad Fuad Muhammad Garindra Yogiswara Goji Pamungkas H Hadiyanto Hakkina, Delano Ichsan Hartanto, Fandika Virgiawan Haryono Setiyo Huboyo Hati, Asri Cahaya Heru Hendrayana Hidayatillah, Ahmad Syauqi I Made Adnyana Nala Imsak Aditya Respati Priyono Isti Karim Muhandini Jayawarsa, A.A. Ketut Kevin Alexander, Kevin M Rio Aulia Mahira Anaqah Huwaina Marin, Jenian Mochamad Arief Budihardjo Muhammad Iqbal Muhrozi Muhrozi Mustiono, Ady Rieo Wahyu Naintina Lisnawati Najib Najib Narulita Santi Nestri Martini Noorbasith Al Fajri Norma Afiati Novi Susanto Novie Susanto Nugraheni, Vania Salsabila Anabel Pranata, Mathias Andika Setya Putri, Maya Aiko Salsabila Rahmawati, Laily Agustina Reddy Setyawan Rinal Khaidar Ali Rinal Khaidar Ali Rino Dwi Hutama Rr. Tony Yulianto Santhi Widyastuti Santi, Narulita Sapto Purnomo Putro Sinatrya Diko Prayudi Sinatrya Diko Prayudi Sri Sangkawati Sri Sangkawati Sachro Suharyanto Suharyanto Susanta, Axel Prima Agita Susanta, Axel Prima Agita T. Listyani R.A. Taat Setiawan Taat Setiawan, Taat Tabitha Abid Ardaneswari Tri Winarno Truman Simaremare Umar, Savikri Misbahul Wahju Krishna Hidajat Wahju Krisna Hidajat Wahju Krisna Hidayat Widyanto David Yanuar Niko Priambodo Zulfa Nindya Salsabila