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Analisis Hidrogeokimia Dan Logam Berat Pada Air Tanah Menggunakan Metode WQI dan HPI Untuk Keperluan Higiene Sanitasi Kabupaten Belitung Timur Putri, Maya Aiko Salsabila; Putranto, Thomas Triadi; Santi, Narulita
TEKNIK Vol. 44, No. 3 (2023): December 2023
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v44i3.56996

Kelapa Kampit is one of the tin-producing districts in East Belitung, which is composed of the Kelapa Kampit Formation. This mining activity affects water quality, which, of course, is also influenced by geological formations. This study aims to analyze the hydrogeochemistry and heavy metals in shallow groundwater in Kelapa Kampit District using water quality indexes in the form of water quality index and heavy metal pollution index methods. Hydrogeochemical test results showed a pH value of water 4 – 6.77 in the acidic category, a DHL value of 20 – 145 μS/cm, and a TDS value of 14 – 111 mg/L. From the visualization of chemical data, groundwater has various facies. The results of the Stiff Diagram show that water contains predominant calcium, magnesium, sulfate, and bicarbonate ions. The Gibbs diagram results show that the water has not been contaminated. The results of heavy metal testing also showed that the values of Fe2+, Mn2+, Pb2+, Zn2+, and Cu2+ were classified as low, and Al3+ was quite high. The results of water quality testing using the water quality index showed that the research area had excellent water quality, and the results of the heavy metal testing using the HPI method showed a low heavy metal contamination value. Based on hydrogeochemical and heavy metal analysis of shallow groundwater, Kelapa Kampit District has good groundwater quality for sanitation hygiene purposes.

Slope Geometry Design Optimization in the Final Wall Pit Area of Sijebi PT. Solusi Bangun Indonesia Tbk, Narogong Factory, Bogor Regency Afwach, Atina -; Najib, Najib -; Santi, Narulita
Jurnal IPTEK Vol 28, No 1 (2024): May
Publisher : LPPM Institut Teknologi Adhi Tama Surabaya (ITATS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.iptek.2024.v28i1.5136

Slope design is an important component that must be considered in open-pit mining. It affects mine safety as well as the maximization of mining activities. These two things have an inversely proportional relationship and must be optimized with each other. This research aims to provide optimal recommendations related to geometry design that considers the stability of slope mining. The methods utilized in this research are Rock Mass Rating (RMR), Geological Strength Index (GSI), Slope Mass Rating (SMR), kinematics analysis, and limit equilibrium method. Based on the investigation that has been carried out, it is known that the value of the safety factor on the research slope is 4.192 for natural conditions and 3.967 for water-saturated slopes. The slope's safety value factor is known to be a very safe condition. Maximizing the mine design is crucial to achieving optimal extraction of mining materials. The most appropriate slope geometry design for the specified research area requires a single slope angle of 80°, a height of 10 m, and a width of 3 m, resulting in an overall slope of 68°. According to the findings of this recommendation, the safety factor value obtained is 2.076 for natural conditions and 2.050 under water-saturated conditions.

Estimasi Cadangan Batugamping Menggunakan Block Model Berdasarkan Metode Interpolasi IDW pada IUP OP 231 Karangkemojing Pertiwi, Agyun Kinanti Fauziyah; Santi, Narulita
MINERAL Vol 9 No 2 (2024): MINERAL
Publisher : Jurusan Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i2.4710

The increasing development of infrastructure development has an impact on the increase in cement demand. Cement is used as the main raw material in making concrete and other construction materials. Therefore, limestone mining as a raw material for cement is also increasing. One of the areas that has prospects for limestone mining is IUP OP 231 Karangkemojing which is still in the exploration stage. The purpose of this study is to determine the geological and geomorphological conditions of the study area, determine the amount of limestone reserves, and determine the estimated mine life based on production targets. The methods used in this research are field observation and laboratory analysis including petrographic analysis and X-Ray Fluorescence (XRF) analysis. Furthermore, the calculation of limestone reserves was carried out using block modeling and the Inverse Distance Weighting (IDW) interpolation method processed using Surpac software. Based on field geological mapping, the research area is included in the wavy hilly and steep hilly structural landforms, which consist of two lithological units, namely sandstone and claystone intermixture units and limestone units. The results of the calculation of limestone reserves in the study area were obtained at 61,444,362 tons with an estimated mine life of about 24 years and 6 months.

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

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).

Penerapan Keselamatan Kesehatan Kerja Lingkungan (K3L) dan Etika Profesi Dosen dengan Metode HIRADC dan JSA dalam Pengambilan Data Geologi dan Sampel Air Tanah Santi, Narulita; Hadiyanto, Hadiyanto; Yudariansyah, Hadi
TEKNIK Vol 45, No 3 (2024): December 2024
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v45i3.60275

Keselamatan Kesehatan Kerja Lingkungan (K3L) merupakan komponen fundamental dalam berbagai sektor, termasuk pendidikan tinggi dan penelitian geologi. Aktivitas seperti pengambilan sampel dan penelitian lapangan kerap menghadirkan berbagai risiko, seperti kecelakaan kerja, paparan bahan berbahaya, serta kondisi lingkungan yang tidak dapat diprediksi. Oleh karena itu, pemahaman dan penerapan prosedur K3L menjadi esensial bagi dosen dan mahasiswa. Sebagai figur teladan, dosen memiliki tanggung jawab moral dan profesional untuk menjalankan etika profesi. Penelitian ini bertujuan untuk mengevaluasi implementasi K3L dan etika profesi dosen dalam kegiatan pengambilan data geologi dan sampel air tanah. Metode HIRADC dan JSA digunakan karena kerangka kerja yang sistematis untuk mengidentifikasi bahaya, menilai risiko, dan pengembangan langkah-langkah pengendalian. Hasil penelitian menunjukkan bahwa pelaksanaan K3L telah dilakukan dengan baik dimana risiko kecelakaan kerja bernilai minimal. Hal ini dicapai melalui proses identifikasi bahaya, evaluasi risiko, serta penerapan pengendalian yang efektif. Etika profesi dosen menjadi landasan seluruh tahapan penelitian, mulai dari perencanaan hingga pelaksanaan di lapangan. Dalam perannya, dosen tidak hanya sebagai narasumber yang memberikan pengarahan sebelum kegiatan lapangan, tetapi juga mengedepankan prinsip etika lingkungan, etika pengambilan keputusan, serta etika integritas dan transparansi. Temuan ini menekankan pentingnya sinergi antara penerapan K3L dan etika profesi untuk menjamin keselamatan, efektivitas, dan keberlanjutan kegiatan penelitian geologi.

Analisis Kualitas Air Tanah Akuifer Bebas Menggunakan Metode Indeks Pencemaran (IP) dan Water Quality Index (WQI) di Kota Semarang, Jawa Tengah Anggraeni, Wahyu Dini; Santi, Narulita; Putranto, Thomas Triadi; Widiarso, Dian Agus
Jurnal Geosains dan Remote Sensing Vol 6 No 1 (2025): JGRS Edisi Mei
Publisher : Department of Geophysical Engineering, Faculty of Engineering, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jgrs.ft.unila.417

Air tanah menjadi salah satu kebutuhan masyarakat, Kota Semarang setidaknya membutuhkan air bersih sebanyak 61,7 m3 setiap tahunnya. Oleh karena itu, kualitas air tanah harus diperhatikan untuk memenuhi kebutuhan air bersih masyarakat. Penelitian bertujuan untuk mengetahui kondisi geologi, geomorfologi, hidrogeologi, kualitas air tanah, serta faktor yang berpengaruh terhadap kualitas air tanah di Kota Semarang tepatnya pada 11 kecamatan. Sebanyak 30 sampel sumur gali dilakukan analisis menggunakan metode Indeks Pencemaran (IP) dan Water Quality Index (WQI) dengan standar baku mengacu pada Permenkes Nomor 2 Tahun 2023 dan WHO (2022). Hasil penelitian menunjukkan keterdapatan litologi aluvium dan konglomerat di daerah penelitian, bentuk lahan terbagi menjadi bergelombang landai denudasional, bergelombang miring denudasional, dan berbukit bergelombang denudasional, sedangkan aliran muka air tanah daerah penelitian menuju ke arah utara tepatnya ke arah Laut Jawa. Kualitas air tanah dengan metode IP menunjukkan nilai 0,61-7,96 dimana terbagi menjadi 3 kategori yakni kondisi baik, cemar ringan, dan cemar sedang. Kualitas air tanah berdasarkan metode WQI dengan standar baku Permenkes (2023) menunjukkan nilai 33,5-1458,36, sedangkan standar baku WHO (2022) menunjukkan nilai 19,59-978,96, kedua standar baku menunjukkan kualitas air tanah terbagi menjadi kategori sangat baik, baik, buruk, sangat buruk, dan tidak layak minum. Air tanah dengan kualitas relatif baik terdapat pada Kecamatan Ngaliyan dan Gajahmungkur.

PROGRAM EDUKASI DAN PENYEDIAN ALAT FILTRASI AIR SUNGAI BAGI WARGA RW 03 KELURAHAN JABUNGAN-SEMARANG Qadaryati, Nurakhmi; Santi, Narulita; Salsabila, Zulfa Nindya; Nurcahyo, Tri Apri
Jurnal Pasopati Vol 6, No 2 (2024): Vol 6, No 2 (2024)
Publisher : Fakultas Teknik Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/pasopati.2024.23907

Pada RW 03 Kelurahan Jabungan, Kecamatan Banyumanik, Semarang terdapat sebanyak 169 Kepala Keluarga. Estimasi dengan asumsi setiap keluarga beranggotakan 4 orang, maka kebutuhan sehari-hari masyarakat RW 03 berkisaran 40.560-54.080 liter/hari. Warga RW 03 memperoleh air bersih dari tiga sumber, yaitu dari sumur gali, Sungai Jabungan dan mataair. Isu terkait air bersih di RW 03 dapat dikatakan terjadi pada saat musim kemarau. Salah satu dampaknya adalah debit sumur gali yang menurun drastis setiap musim kemarau. Alternatif sumber air terdekat selanjutnya adalah dari Sungai Jabungan. Akan tetapi, diperlukan treatment pengolahan terlebih dulu agar dapat memakai air dari sungai tersebut untuk keperluan MCK. Hal tersebut menyisakan pilihan terakhir pada sumber air dari mataair yang lokasinya jauh dari pemukiman, hingga saat ini kondisi pipa yang mengalirkan mataair ini ada banyak titik kebocoran dan hanya ditambal dengan sangat sederhana. Prioritas bagi warga RW 03 Kelurahan Jabungan, Kecamatan Banyumanik selaku mitra Pengabdian Kepada Masyarakat (PKM), adalah pemenuhan kebutuhan air bersih selama musim kemarau karena selain menjadi kebutuhan utama untuk hal domestik, di masa sekarang ini juga sangat diperlukan untuk tetap menjalankan protokol kesehatan untuk mencegah COVID-19. Menindaklanjuti kebutuhan tersebut, sebagai pelaksana PKM telah menyediakan fasilitas penyedia air bersih minimal untuk memenuhi kebutuhan warga RW 03.

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

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.

Estimasi Cadangan Batugamping Menggunakan Block Model Berdasarkan Metode Interpolasi IDW pada IUP OP 231 Karangkemojing: Estimation of Limestone Reserves Using Block Model Based on IDW Interpolation Method in IUP OP 231 Karangkemojing Pertiwi, Agyun Kinanti Fauziyah; Santi, Narulita
MINERAL Vol 9 No 2 (2024): MINERAL
Publisher : Program Studi Teknik Pertambangan Universitas Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33019/mineral.v9i2.4710

The increasing development of infrastructure development has an impact on the increase in cement demand. Cement is used as the main raw material in making concrete and other construction materials. Therefore, limestone mining as a raw material for cement is also increasing. One of the areas that has prospects for limestone mining is IUP OP 231 Karangkemojing which is still in the exploration stage. The purpose of this study is to determine the geological and geomorphological conditions of the study area, determine the amount of limestone reserves, and determine the estimated mine life based on production targets. The methods used in this research are field observation and laboratory analysis including petrographic analysis and X-Ray Fluorescence (XRF) analysis. Furthermore, the calculation of limestone reserves was carried out using block modeling and the Inverse Distance Weighting (IDW) interpolation method processed using Surpac software. Based on field geological mapping, the research area is included in the wavy hilly and steep hilly structural landforms, which consist of two lithological units, namely sandstone and claystone intermixture units and limestone units. The results of the calculation of limestone reserves in the study area were obtained at 61,444,362 tons with an estimated mine life of about 24 years and 6 months.

Analysis of Pore Water Pressure and Seepage During The Impounding Stage of Randugunting Dam Fatimah, Illya Nur; Hidajat, Wahju Krisna; Santi, Narulita
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.v22i3.881-892

Piping induced by seepage poses a significant risk to the stability of Randugunting Dam, located in Blora Regency, Central Java. This study aims to assess the geological and engineering geological conditions of the study area and to analyze the behavior of pore water pressure and seepage during the impounding stage. The methodology includes geological and engineering geological mapping, as well as field monitoring using instruments such as vibrating wire piezometers, v-notch, and observation wells. These field results were then compared with Finite Element Method (FEM) analysis conducted in GeoStudio SEEP/W 2018. The pore water pressure values derived from FEM analysis were generally higher than the actual values recorded by the piezometers. Groundwater levels observed in the wells showed a strong correlation with rainfall intensity. The actual seepage discharge measured at the v-notch was 0.000118 m3/sec, whereas the FEM analysis yielded a significantly higher discharge of 0.01271 m3/sec. Despite this, the measured discharge remains within safe limits, being less than 0.016 m³/s (2% of inflow) and below 0.14 l/min/m. Nevertheless, the higher discharge indicated by FEM analysis suggests a potential risk of piping that warrants attention.

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