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All Journal Indonesian Journal of Geography Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Majalah Geografi Indonesia Jurnal RISET Geologi dan Pertambangan Jurnal Pengembangan Kota Journal of Degraded and Mining Lands Management Jurnal Wilayah dan Lingkungan Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) PROMINE Jurnal Geosains dan Teknologi Journal of Applied Geology BULLET : Jurnal Multidisiplin Ilmu Jurnal Geosaintek

Doni Prakasa Eka Putra

Departemen Teknik Geologi, Fakultas Teknik, Universitas Gadjah Mada

Author-ID : 258314

Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Medicine & Pharmacology Nursing

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Evaluasi Pengelolaan Embung di Kabupaten Sleman, Daerah Istimewa Yogyakarta Wilopo, Wahyu; Setiawan, Hendy; Eka Putra, Doni Prakasa
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 17, No 3 (2020): November 2020
Publisher : Universitas Diponegoro

The Indonesian government has promoted reservoir (embung) development programs throughout Indonesia. This program is primarily designed at supporting agricultural irrigation, especially in the dry season. However, in its implementation, there are often many obstacles both in technical and management, causing the main purpose of the reservoir construction cannot be achieved optimally. Therefore, this study aims to evaluate the condition of the reservoir located in Sleman Regency, Yogyakarta Special Region, in terms of physical, institutional, and management constraints. The study was conducted through a direct survey of 9 reservoirs and interviews with managers and residents around the reservoir. The results showed that two reservoirs have small damage in the reservoir building, three reservoirs do not yet have managers, and three reservoirs have not functioned following the purpose of reservoirs development. The obstacle often found in managing reservoirs is the unclear structure for the management of the reservoir, and the existing management is not effectively working. Therefore, the regulation of using reservoir water is not available. It is necessary to have a management organization involving the community and village government where the reservoir is located and also community beneficiaries of agricultural irrigation to guarantee its function and sustainability.

Hidrokimia dan Indikasi Kontaminasi pada Air Tanah di Lereng Selatan Gunung Merapi, Mlati dan Sekitarnya, Sleman, D.I.Yogyakarta Rahmat Satya Nugraha; Doni Prakasa Eka Putra
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 29, No 2 (2019)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/risetgeotam2019.v29.1027

Daerah Mlati - Sleman di Daerah Istimewa Yogyakarta secara hidrogeologi regional terletak pada sistem Cekungan Air Tanah (CAT) Yogyakarta-Sleman, yang secara stratigrafi terdiri dari Formasi Sleman dan Formasi Yogyakarta. Kedua formasi batuan ini membentuk sistem akuifer multilayer. Penelitian ini bertujuan untuk mengetahui karakteristik hidrokimia serta indikasi kontaminasi di Daerah Mlati. Penelitian dilakukan dalam beberapa tahapan yaitu observasi hidrogeologi lapangan, penentuan titik pengambilan sampel, pengambilan sampel air tanah dan analisis laboratorium. Hasil analisis laboratorium menunjukkan tipe air tanah pada sumur gali yang mewakili akuifer bebas didominasi oleh tipe Ca2+-Na+-HCO3- . Pada air tanah dari sumur bor dalam, tipe air didominasi oleh tipe Ca2+-Na+-HCO3--Cl-. Selain itu, diketahui bahwa kandungan besi dan mangan pada sumur bor dalam umumnya lebih tinggi daripada sumur dangkal. Indikasi kontaminasi ditunjukkan dengan adanya kandungan nitrat pada sumur gali dengan kadar nitrat rata-rata 15 mg/l, sedangkan pada sumur bor dalam tidak dijumpai unsur nitrat. Dapat disimpulkan bahwa kedua akuifer memiliki karakteristik kimia air yang didominasi oleh unsur Ca2+-Na+-HCO3-, hanya saja pada akuifer dalam terdapat ion klorida turut mendominasi. Adanya nitrat pada sumur gali dengan kadar nitrat rata-rata diatas 10 mg/l, menandakan bahwa sumur gali atau akuifer bebas dangkal rentan terhadap pencemaran yang bersumber dari aktivitas manusia di permukaan.The area of Mlati - Sleman is hydrogeologically located in the Yogyakarta-Sleman Groundwater Basin (GB) system, which stratigraphically consists of the Sleman Formation and the Yogyakarta Formation. The purpose of this study is to determine the hydrochemical characteristics and indications of contamination in the Mlati Region. The research was started with the field hydrogeological observation, determination of sampling points, groundwater sampling and laboratory analysis. Based on laboratory analysis, the groundwater types in the dug wells (unconfined aquifers) were dominated by type Ca2+-Na+-HCO3- . The groundwater from deep wells was dominated by type Ca2+-Na+-HCO3--Cl-. In addition, it is known that the iron and manganese content in deep bore wells is generally higher than shallow wells. The contamination is indicated by the presence of nitrate in the dug wells with an average nitrate level of 15 mg/l, while in the deep well bore there is no element of nitrate. Therefore, we concluded that the two aquifers are dominated by the elements Ca2+-Na+-HCO3-. In the deep aquifer, the chloride ion is also dominating. The presence of nitrates in dug wells with an average nitrate level above 10 mg/l indicates that shallow wells or shallow unconfined aquifers are susceptible to pollution from human activities.

Impact assessment of apartment building foundation to Terban spring discharge, Yogyakarta City Wahyu Wilopo; Doni Prakasa Eka Putra; H Setiawan; K D Setyawan
Journal of Degraded and Mining Lands Management Vol 7, No 3 (2020)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2020.073.2111

The development growth of hotel and apartment in Yogyakarta city is considered to have an impact on groundwater, especially springs located along the river across Yogyakarta city. Most of the foundations of hotels and apartments are below the groundwater level. Therefore, this study aimed to predict the impact of apartment building foundations on Terban spring discharge in Yogyakarta city. Method of impact prediction was conducted by groundwater modeling approach before and after the apartment is built. Visual Modflow 3.1 software was used to develop groundwater modeling in the research area with input parameters including rock types and layers, permeability value of each rock, recharge, model boundary, groundwater level and apartment foundation design. The simulation results show that the impact of apartment foundations on the Terban spring water discharge causing decreased by 4.12% or 0.027 litres/second. Although the amount of spring discharge is relatively small, therefore it is necessary for groundwater conservation to keep the spring discharge stable by developing recharge wells.

Seawater intrusion assessment and prediction of sea-freshwater interface in Parangtritis coastal aquifer, South of Yogyakarta Special Province, Indonesia Wahyu Wilopo; R Risanti; Raja Susatio; Doni Prakasa Eka Putra
Journal of Degraded and Mining Lands Management Vol 8, No 3 (2021)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2021.083.2709

The Parangtritis area is a tourist destination in Yogyakarta, Indonesia, consisting of dunes and plains. One of the essential parameters in tourist areas is the provision of water sources. The increase in tourist visits and the development of tourism facilities in this area have increased groundwater utilization. Therefore, this study aims to assess the potential of seawater intrusion in the Parangtritis Beach area and its surroundings, Indonesia. The research was carried out by surveying, field measurements, and groundwater samples to test major ions in the laboratory. Indications of seawater intrusion are based on TDS values, Cl-, Simpson ratio, Sodium Chloride ratio, BEX, and groundwater type. The results showed that the research area had a shallow groundwater level with groundwater flow relative to the south-southwest and composed of unconfined aquifers. Only two water samples indicate seawater intrusion from Parangwedang spring and its southern place based on the geochemical analysis. However, this spring was formed due to geological structure related to geothermal manifestation and not due to seawater intrusion. It has a lateral flow to the south and is mixed with shallow groundwater, thereby increasing the chloride concentration in the groundwater. The sea-freshwater interface has a depth from 52 meters to 284 meters from sea level, where the farther from the coastline, the more profound.

Assessment of organic carbon contamination in the unsaturated zone: a case of Yogyakarta City, Indonesia Heru Hendrayana; Doni Prakasa Eka Putra; Yosua Priambodo
Journal of Degraded and Mining Lands Management Vol 9, No 1 (2021)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2021.091.3115

In 1997, groundwater pollution was caused by a diesel leak at the Yogyakarta City Railway Station. People in the south of the railway station discovered the presence of diesel in dug wells in 2001. The existing diesel is still found in dug wells even though the pollutant source had been removed. The current source of pollution comes from diesel residues trapped in the unsaturated zone. Understanding the distribution and concentration of diesel in the unsaturated zone is the goal of this study. In this study, diesel concentration was measured based on Total Organic Carbon (TOC) levels. The research was conducted through shallow core and deep core drillings. Shallow core drilling was done at 14 points with a depth of 50 cm, and deep core drilling was done at nine drilling points with a depth of 15-17 m. 14 shallow core drilling samples were taken from a depth of 30 and 50 cm and nine deep core drilling samples were taken from a depth of 4-5 m and 10-11 m. The lithology logs in both drills were tested for diesel odour and TOC levels using the Soli TOC tool. Based on the test results, the smell of diesel was found at a depth of 10 to 15 m. TOC levels in the unsaturated zone ranged from 340 to 90,870 mg/L. TOC levels >30,000 mg/L were dominant at shallow depths even though they did not smell like diesel. At a location close to the source of the diesel tank leak at a depth of 4-5 m, the measured TOC level was 30,100 mg/L. The results showed that there were zones of high TOC levels associated with diesel odour layers. The zones existed because of the infiltration and percolation processes that had carried surface water and diesel pollutants and eventually moved horizontally following groundwater flow.

Degradation of groundwater quality due to the occurrence of salty-tasted water in Bayat District, Klaten, Central Java, Indonesia Doni Prakasa Eka Putra; Deviana Halim; Sandi Suko Widagdo; Rilo Restu Surya Atmaja
Journal of Degraded and Mining Lands Management Vol 8, No 1 (2020)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2020.081.2525

Bayat is located in the south of central Java, Indonesia. In the quaternary deposit area, groundwater on some dug wells taste salty and previous studies discovered salty-tasted water with electrical conductivity (EC) >5000 μS/cm and chloride concentration >1000 mg/l. Local information reported that the number of wells containing salty-tasted water increased after the 6.2 Mw earthquake on May 27th, 2006 in Yogyakarta. This research aims to determine the distribution of salty-tasted groundwater and its relation with the geological condition by conducting a hydrogeological investigation. On the hydrogeological investigation, dug wells were observed for physical-chemical characteristics such as total dissolved solid (TDS) and EC; additionally, groundwater samples were collected for chloride ion analysis. Geology of the study area is mapped based on previous studies. The result showed that the high TDS/EC groundwater correlated with salty-tasted water which found in three different areas, including in the west, middle and east part of the study area. The occurrence of salty-tasted water strongly aligns with faults zone. In conclusion, deep salty-tasted water emerges not only locally near the fault zone but also associated with trapped groundwater and buried anticline. In regard to those sources, it can be predicted that in the near future more dug wells water may turn into salty-tasted water, especially in the area closed to the fault zone.

Aquifer distribution and groundwater geochemistry in Bojonegoro Sub-district, Bojonegoro District, East Java Province, Indonesia Wahyu Wilopo; Doni Prakasa Eka Putra; Raja Susatio
Journal of Degraded and Mining Lands Management Vol 7, No 4 (2020)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2020.074.2327

Bojonegoro Sub-district is the capital of Bojonegoro District, East Java Province, Indonesia. This area has quite high economic growth supported by large oil and gas reserves in the district. An increasing number of population and improving economy will cause more water needs. People in this area use groundwater as their main source for daily purposes. However, information on the potential of groundwater resources is not yet well available. Therefore, the study aims to determine groundwater flow patterns, the distribution of aquifers, and groundwater geochemistry. The study was conducted by measuring groundwater level as many as 42 points; both dug wells and deep wells, 18 points geo-electrical surveys, and chemical analysis of eight groundwater samples. The results showed groundwater flow direction into the Bengawan Solo River with the primary aquifer of the sandstone lens. All groundwater samples indicate that the type of groundwater is calcium magnesium bicarbonate (Ca2+ - Mg2+ - HCO3-) and come from one system. High nitrate content was found in some areas, probably due to contamination from agricultural or urban wastewater. Therefore, it needs some actions for groundwater protection and conservation in this area to support the sustainable use of groundwater.

Identification of subsidence hazard zone by integrating engineering geological mapping and electrical resistivity tomography in Gunung Kidul karst area, Indonesia Wahyu Wilopo; Doni Prakasa Eka Putra; Teuku Faisal Fathani; Slamet Widodo; Galeh Nur Indriatno Putra Pratama; Maris Setyo Nugroho; Wisnu Rachmad Prihadi
Journal of Degraded and Mining Lands Management Vol 9, No 2 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2022.092.3281

The presence of natural cavities in karst morphology may cause severe civil engineering and environmental management problems. Karst formations will limit the expansion of urbanization, especially infrastructure development in limestone areas. Geophysical methods, especially electrical resistivity tomography (ERT) techniques, are effective and efficient solutions to detect voids below the surface. This study aimed to develop a subsidence hazard map as basic information for infrastructure development. The identification was made by measuring electrical resistivity tomography on eight profiles in the infrastructure development plan. In addition, it was also supported by geological mapping, particularly the structural geology and types of rocks around the site. The research area consists of massive limestone, bedded limestone, and cavity limestone with generally north-south joints. The analysis of geological mapping data and electrical resistivity tomography measurements showed that the cavity limestone was identified with a north-south elongated pattern in line with the fracture pattern found on the surface at the research area. The surface lithology type, the geological structures density, and the subsurface lithology were used to develop a subsidence hazard map. This information is beneficial in determining the safe location of infrastructure development based on disaster risk mitigation.

Ten Year Groundwater Simulation in Merapi Aquifer, Sleman, DIY, Indonesia Visi Asriningtyas; Doni Prakasa Eka Putra
Indonesian Journal of Geography Vol 38, No 1 (2006): 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.2232

Simulation of groundwater withdrawal has been conducted with a groundwater modeling system (GMS) version 3.1 software at a regional scale. The simulation was conducted from ten year groundwater withdrawal data in Merapi Aquifer, DIY, Indonesia, for two assumed scenarios, with an emphasis in Sleman area. The result for the ten year groundwater simulation was conducted spatially distributed in the Merapi Aquifer after the steady state simulation was reached. With two different types of transient simulations, the total withdrawal of 28,968 m3/day for the whole Merapi Aquifer is still acceptable with caution, as long as the . recharge is not decreasing. However, less withdrawal as the existing withdrawal condition is recommended until local site investigation is sufficient to avoid the danger of overdraft.

Kajian daya dukung geologi rencana lokasi Tempat Pembuangan Akhir di Desa Botok, Magetan, Jawa Timur Doni Prakasa Eka Putra; Rilo Restu Surya Atmaja; Wahyu Wilopo; Pramono Hadi
Majalah Geografi Indonesia Vol 35, No 1 (2021): Majalah Geografi Indonesia
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/mgi.60644

Abstrak.Tempat Pembuangan Akhir (TPA) sampah Milangasri di Kabupaten Magetan telah mencapai daya tampung maksimum. Pemerintah Kabupaten Magetan berencana membangun TPA baru di Desa Botok. Penelitian ini bertujuan untuk melakukan kajian kelayakan daya dukung geologi rencana lokasi TPA baru. Kriteria daya dukung geologi mengacu pada SNI 03-3241-1994 tentang tata cara pemilihan lokasi TPA. Metode penelitian meliputi investigasi lapangan dan pengumpulan data sekunder. Penelitian lapangan meliputi pengamatan kondisi geologi, pemetaan topografi, survei geolistrik, pemboran inti dan uji permeabilitas lapangan serta pengamatan sumber air terdekat. Data sekunder meliputi informasi yang berkaitan dengan potensi bahaya geologi. Hasil penelitian menunjukkan bahwa kelulusan batuan antara 1,26 × 10-2 hingga 1,59 × 10-2 cm/detik tidak memenuhi kriteria. Sehingga secara alami, lokasi ini kurang layak dijadikan sebagai lokasi TPA. Namun demikian, rekayasa teknologi dengan memberikan lapisan kedap air pada alas TPA seperti compacted clay liner atau geosynthetic liner menjadikan area ini layak untuk TPA. Abstract.Current landfill in Milangasri nearly reach its maximum capacity. The government of Magetan regency plans to build a new landfill in Botok. This research aims to assess the land capability based on geological characteristics of the landfill location. The SNI 03-3241-1994 used as basic criteria for selecting landfill area. Research methods consist of field investigation supported by secondary data. Field investigation consist of geological observation, topography mapping, resistivity survey, core drilling and field permeability testing, and water source observation. Information of potential geological hazard collected as secondary data. The results show that the hydraulic conductivity of the quaternary deposit ranging of 1.26 × 10-2 to 1.59 × 10-2 cm/s, failed to meet the criteria. Therefore, by nature the location candidate not supported geologically as landfill location. However, application of compacted clay liner or geosynthetic liner as the base of the landfill is recommended to improve the capability.

Co-Authors Adelide Asriati Sekar Rianda Agung Harijoko Agung Setianto Agus Budhie Wiyatna Agus Hendratno Alwan Satapona Atikah Zahidah Atmaja, Rilo Restu Surya Aung, Hnin Thazin Avantio Pramaditya Azmin Nuha Azwar Satry Muhammad Boreborey, Ty Boulom, Johnny Carlito Baltazar Tabelin Denizar Rahman Deviana Halim Doung Rata Dwikorita Karnawati Efendi Putra Dwijaya Pa Egy Erzagian Galeh Nur Indriatno Putra Pratama H Setiawan Harizona Aulia Rahman Haryono, Septiawan Nur Hazarika, Hemanta Hemanta Hazarika Hendy Setiawan Heng, Salpisey Hermawan, Oktanius Richard Heru Hendrayana Hirajima, Tsuyoshi Hnin Thazin Aung I Gde Budi Indrawan I Wayan Warmada Igarashi, Toshifumi Jaingot A. Parhusip Jaingot A. Parhusip, Jaingot A. Jinno, Kenji Johnny Boulom Juwarso Juwarso Juwarso, Juwarso K D Setyawan Kenji Jinno Keophousone Phonhalath Kurnianto Dwi Setyawan Kyu Kyu Mar Kyu Mar, Kyu Leakhena Snguon Lenggono, Tego Lestari Sutra Simamora Liliane Manny Makealoun, Somyot Manixone Thepgnothy Manny, Liliane Maris Setyo Nugroho Mohammad Pramono Hadi Muhamad Ilham Muhammad Haikal Razi Muhammad Iqbal Muhammad Iqbal Muhammad, Azwar Satry Nuha, Azmin Oktanius Richard Hermawan Phetnakhone Xaixongdeth Phonhalath, Keophousone Ponhalath Xaixongdeth R Risanti Rahman, Denizar Rahmat Satya Nugraha Raja Susatio Raja Susatio Raja Susatio Rata, Doung Restu Tandirerung Riana Listiyastuti Rilo Restu Surya Atmaja Rilo Restu Surya Atmaja Rilo Restu Surya Atmaja Rilo Restu Surya Atmaja Salpisey Heng Sandi Suko Widagdo Sarto Sarto Sarto Satapona, Alwan Sato, Tsutomo Sato, Tsutomu Saw Aung Zaw Aye Sekar Rianda, Adelide Asriati Septiawan Nur Haryono Shinta Dwi Novianti Slamet Widodo Snguon, Leakhena Somyot Makealoun Soutsadachan Chandalsouk Souvannachith, Thilavanh Suryanto, Wiwit Syauqi, Syauqi T. Putranto, Thomas Tabelin, Carlito Baltazar Tee Xiong Tego Lenggono Teuku Faisal Fathani Teuku Faisal Fathani Thanh Thuy, Tran Thi Thepgnothy, Manixone Thilavanh Souvannachith Thomas T. Putranto Thomas Triadi Putranto Thomas Triadi Putranto, Thomas Triadi Toshifumi Igarashi Tran Thi Thanh Thuy Tsutomo Sato Tsutomu Sato Tsuyoshi Hirajima Tsuyoshi Hirajima Ty Boreborey Visi Asriningtyas Wahyu Wilopo Wawan Budianta Wibowo, Handoko Teguh Wisnu Rachmad Prihadi Wiyatna, Agus Budhie Xaixongdeth, Phetnakhone Xaixongdeth, Ponhalath Xiong, Tee Yosua Priambodo Zaw Aye, Saw Aung

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