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All Journal Indonesian Journal of Geography Majalah Forum Teknik UGM Geo Media: Majalah Ilmiah dan Informasi Kegeografian LaGeografiA Majalah Geografi Indonesia Journal of Degraded and Mining Lands Management Jurnal Wilayah dan Lingkungan Jurnal Pengabdian Kepada Masyarakat (Indonesian Journal of Community Engagement) Jurnal Geosains dan Teknologi Geodika: Jurnal Kajian Ilmu dan Pendidikan Geografi Jurnal Fisika Indonesia Journal of Applied Geology Jurnal Manusia dan Lingkungan

Heru Hendrayana

Departemen Teknik Geologi, Fakultas Teknik, Universitas Gadjah Mada Yogyakarta

Author-ID : 279453

Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Energy Engineering Environmental Science Physics Social Sciences Other

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GROUNDWATER VULNERABILITY OF PANDAK AND BAMBANGLIPURO, YOGYAKARTA SPECIAL PROVINCE, INDONESIA Leakhena Snguon; Doni Prakasa Eka Putra; Heru Hendrayana
Journal of Applied Geology Vol 2, No 2 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The study of intrinsic vulnerability of groundwater was generated in order to delineate groundwater protection zone in Pandak and Bambanglipuro, Indonesia, whose mainly water supply is from groundwater. Two methods of vulnerability mapping are chosen for the evaluation; DRASTIC method and Hoelting method. The resulted maps conducted from these method are validated using the actual contaminant concentration through the impact of on-site sanitation, for instance nitrate as it is proved to be very stable contaminants in groundwater. Considered in different hydrogeological setting, these two methods have produced various results at the certain site. However, its reliability has been drawn upon the nitrate concentration at the study areas. Keywords: Intrinsic groundwater, vulnerability, DRASTIC, Hoelting methods, nitrate contamination

Geochemical Fraction, Mobility And Bioavailability Of Lead In Unsaturated Soil Of Yogyakarta City, Indonesia Saw Aung Zaw Aye; Heru Hendrayana; Doni Prakasa Eka Putra; Tsutomo Sato
Journal of Applied Geology Vol 7, No 1 (2015)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Lead (Pb) is one of common heavy metals found inthe soil of urban environment. In Yogyakarta City,Indonesia, lead content in the soil was already reported by some researchers, however all of the report were only reveals the distribution of lead concentration in the soil. Therefore, this research paper aims to understand the geochemical fraction leadin the soil of Yogyakarta City and assess the mobility and bioavailability of lead release to the environment. The soil sampling location is selected on Kotagede District, representing the oldest urban area of Yogyakarta city. A shallow bore hole was drill until about 7 m below the surface and soil/sediments weresampled for each 1 m depth started from the surface. Six steps of sequential extraction procedures were carried out to assess the geochemical fraction of Pb for each of soil samples. The sequential extraction shows that the highest amount of Pb in thesoil of Yogyakarta City is found in amorphous ironoxide, crystalline iron oxide and non residual fraction form of Pb. Based on the results of geochemical fraction, the mobility factor of lead can be calculated and reveals low mobility factor range from 0.4 to 3.3%. The mobility of lead is decreased from the surface to the deeper soil, on the other hand the bioavailability of Pb calculated from exchangeable and carbonate fraction is also show low risk of bioavailability. Therefore, it can be concluded that although Pb concentration is high in non-residual fraction, Pb isin low risk condition due to its poor mobility and bioavailability. But, concern on lead contamination should be considered because if the concentration of Pb is enriched over the adsorption capacity of ironoxide, it can easily release to the environment and can impact to human in the future.Keywords: Yogyakarta city, Lead, Sequential extraction, Geochemical fraction

Assessment of Groundwater Contamination Hazard by Nitrate in Samas Area, Bantul District, Yogyakarta, Indonesia Thilavanh Souvannachith; Doni Prakasa Eka Putra; Heru Hendrayana
Journal of Applied Geology Vol 2, No 1 (2017)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Groundwater resource is an essential for various purposes in Bantul district, Yogyakarta Special Province, Indonesia, especially on Poncosari village where the water supply are depending on shallow groundwater resources. On this village, most of the houses using dug wells to provide their water needs and applying inappropriate on-site sanitation system, however there are also difference land uses. This condition increase the hazard of groundwater contamination by fecal coli bacteria and nitrate. Therefore, this research aims in term of three main objectives: ﬁrstly, to know the level of nitrate concentration in groundwater, secondly, to assess groundwater vulnerability and thirdly, to assess the level of groundwater contaminant hazard. Hydrogeology observation was conducted and 47 water samples (44 groundwater samples and 3 surface water samples) were collected from different land use type and analyze for nitrate (NO 3) content. Methodology used to assess the groundwater vulnerability was Simple Vertical Vulnerability method and the groundwater contamination hazard built based on the combination of groundwater vulnerability and nitrate loading potential map. Results show that groundwater concentrations of nitrate range from 0.09–74.80 mg/L and the highest concentration found in the settlement area. Assessment of groundwater vulnerability reveals three areas of moderate, moderate high and high classes of vulnerability due to shallow groundwater and the sandy dominated overlying material in the study area. Combination of groundwater vulnerability and nitrate loading potential map indicated that groundwater contaminant hazard of nitrate range from low to high class. High class of hazard located in the settlement area, and low hazard of nitrate contamination found in the irrigated rice ﬁeld area

Groundwater Flow Modeling in the Malioboro, Yogyakarta, Indonesia Alwan Satapona; Doni Prakasa Eka Putra; Heru Hendrayana
Journal of Applied Geology Vol 3, No 1 (2018)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Malioboro is a famous tourism area in Yogyakarta City, in which there aremany hotels and increases every years and this follows by the increasing needs of fresh water taken from underlying groundwater. The decreasing of groundwater table become a great issue on this area, therefore the objective of the research is to predict groundwater table change in the next 10 years due to increase abstraction of groundwater. To answer the mentioned objectives, field observation of dug wells and collection of secondary data of log bores also calculation of recharge and water abstraction are used to understand and build the conceptual model of local groundwater system. The prediction is done by conducting simulation on a numerical groundwater model by using MODFLOW. The local groundwater system consists of two aquifer layers; upper aquifer and lower aquifer which separated incompletely by clay layer. Simulation is conducting by distributing the groundwater pumping for domestic and non-domestic utilization by dug wells in the upper aquifer, whereas deep wells non-domestic utilization are applied only in the lower aquifer. Simulations are conducted twice for the recent day and the next ten years predictionof groundwater abstraction. In the case of groundwater abstraction in the next tenyears, dug wells abstraction and deep wells pumping are setting to 4727 m3/day and 1648 m3/day, respectively. The groundwater pumping rates is representing increase of groundwater withdrawal of users in the range only between 0.2–1.2 % per year compare to the recent condition. The simulation reveals change occur on groundwater table depth and pattern. In average, the groundwater table will decrease of about 0.25 meter.

Determination of Groundwater Recharge Area by Using Hydroisotope Technic of Sei Bingei Area and Surrounding Areas, Langkat Regency, North Sumatra Azmin Nuha; Heru Hendrayana; Agus Budhie Wiyatna; Doni Prakasa Eka Putra; Azwar Satry Muhammad
Journal of Applied Geology Vol 5, No 1 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Determination of Groundwater Recharge Area by Using Hydroisotope Technic of Sei Bingei Area and Surrounding Areas, Langkat Regency, North Sumatra

Mineralogical, Geochemical, and Mechanical Characteristics of Intrusive Andesite Rock Slope in Sangon 2 Area, Kulon Progo Regency, Indonesia Hnin Thandar Phyu; Heru Hendrayana; I Gde Budi Indrawan; Toshitaka Kamai
Journal of Applied Geology Vol 5, No 1 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

This study was carried out to investigate mineralogical, geochemical, and mechanical characteristics of intrusive igneous rock andesite consisting of Sangon 2 Slope located in Kulon Progo Mountains. Mineralogical characteristics of the rocks consisting of the slope were identified by visual observation of hand specimens in the field and petrographic and X-ray Diffraction (XRD) analyses of the rock samples in the laboratory, which rock genetic classification was determined. Types of rock hydrothermal alterations were determined by the presence of key minerals identified in the petrographic and XRD analyses. Hydrothermal alteration intensity was determined by comparing the number of secondary minerals to the primary minerals observed in the petrographic analyses of thin sections by point counting method. Rock weathering degrees were determined in the field based on the visual characteristics and in the laboratory-based on the Chemical Index of Alteration (CIA) of the rock samples. The rock uniaxial compressive strength (UCS) was determined by point load and compression tests. The results showed that the rocks typically consisted of 6.37 to 74.3% plagioclase, 1.52 to 6.82% quartz, 7.81 to 17.2% hornblende, and 4.81% pyroxene minerals and, therefore, were classified as andesite. The presence of chlorite and calcite as secondary minerals in the andesite rock samples indicated that the parent andesite rocks had undergone prophylactic hydrothermal alteration. Meanwhile, the percentages of primary minerals to secondary minerals indicated that the andesite rocks had undergone weak to high alteration intensity. Based on the visual characteristics, the research area consisted of fresh, slightly, moderately, highly, and completely weathered andesite rocks, and residual soil. The CIA values of the rock samples increased with the increase in rock weathering degree. Rock weathering degrees identified by the visual characteristics appeared to be in good agreement with those classified based on the CIA. The lower part of the mine slope profile consisted of fresh and slightly and moderately weathered andesite rocks, which had relatively high strength and were classified as very strong rocks. Meanwhile, the upper part of the slope profile consisted of highly and completely weathered andesite rocks, which had low compressive strength.Keywords: andesite, hydrothermal alteration, kulon progo, prophylactic alteration, weathering

Simulation of Kalirejo Road Side Slope based on Altered Andesite Characters, Kulon Progo Regency, Indonesia Hnin Thandar Phyu; Heru Hendrayana; I Gde Budi Indrawan; Toshitaka Kamai
Journal of Applied Geology Vol 5, No 2 (2020)
Publisher : Geological Engineering Department Universitas Gadjah Mada

ABSTRACT. This study is performed to investigate the characteristics of intrusive andesite rock consisting of Kalirejo Road Side Slope located in Kulon Progo Mountains. The rocks consisting the slope are identified by visual observation of hand specimens in the field, petrographic and X-ray Diffraction (XRD) analyses of the rock samples in the laboratory, upon which genetic rock classification is determined. The altered rock types are determined by the presence of specific minerals identified in the petrographic and XRD analyses. The alteration intensity is examined by comparing the amount of secondary minerals to the primary minerals observed in the petrographic and XRD analyses. The developments of rock weathering are determined in the field GSI classification based on the visual characteristics and in the laboratory-based on the Chemical Index of Alteration (CIA) and engineering properties of the altered rocks. The results show that the rocks typically consisted of 33.2 to 59.2% plagioclase, 1.4 to 5.1% quartz, therefore, are classified as andesite. The presence of halloysite, montmorillonite, and kaolinite as secondary minerals in the altered andesite indicated that the parent andesite rocks have undergone argillic alteration. Meanwhile, the percentages of primary minerals to secondary minerals indicate that the andesite rocks have undergone moderate to high alteration intensity. Based on the visual characteristics, the research area consisted of fresh, slight weathered andesite rocks and complete weathered residual soil. The CIA values of the samples are increased with the increase in rock weathering. Identification of visual characteristics of rock weathering appeared to be in good agreement with those classified based on the CIA and engineering properties analysis results. The uniaxial compressive strength (UCS) of rocks and soils is determined by point load tests. Engineering properties of the residual soils are performed by using ASTM standard procedures. In the lower part of the roadside, slope consists of fresh and slightly weathered andesite rocks, which have relatively high strength and are classified as medium strong rocks. Meanwhile, the upper part of the slope profile contained completely weathered residual soil, which had very low compressive strength, are classified as very weak soil.Keywords: andesite, argillic alteration, Geological Strength Index (GSI), hydrothermal alteration, roadside slope, weathering

Analisis Geometri dan Konfigurasi Sistem Akuifer Air Tanah Berdasarkan Data Geofisika di Kabupaten Sleman Bagian Timur Budiarjo Budiarjo; Heru Hendrayana
Jurnal Fisika Indonesia Vol 23, No 1 (2019)
Publisher : Department of Physics Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jfi.v23i1.42997

Penelitian Metode Geolistrik Resistivitas konfigurasi Wenner-Schlumberger dengan bentangan 360 m. kedalaman 75 m. di Kabupaten Sleman Bagian Timur menggambarkan satuan hidrostratigrafi. Model 3D konseptual model sistem akuifer air tanah digunakan untuk menganalisis geometri dan konfigurasinya. Geometri akuifer air tanah secara horizontal, sisi utara batas antara akuifer dan non-akuifer dibedakan secara jelas berupa batuan resistivitas rendah 20 − 50 ohm.m (akuifer minor), 51 − 140 ohm.m (akuifer utama) dengan batuan resistivitas tinggi > 140 ohm.m (akuifug). Berdasarkan pola aliran muka air tanah sisi timur dibatasi oleh Sungai Gendol, sisi barat Sungai Boyong dan sisi selatan Sungai Opak. Di bagian bawah akuifer hasil 3D Konseptual model sistem akuifer air tanah menunjukkan kemenerusan keluar daerah penelitian. Secara vertikal terlihat batas antara akuifer dan non akuifer, namun batas bawah menerus di bawah jangkauan pengukuran. Berdasarkan data Geofisika Geolistrik Resistivitas, konfigurasi sistem akuifer air tanah di Kabupaten Sleman Bagian Timur, tersusun oleh satu akuifer diselingi oleh lapisan non-akuifer yang tidak menerus.

Assessment of groundwater leakage source using hydrochemical data and isotopes in the Pandanduri dam tunnel, Lombok Island, Indonesia Heru Hendrayana; Doni Prakasa Eka Putra; Hendy Setiawan; I Gde Budi Indrawan; Wawan Budianta; Wahyu Wilopo
Journal of Degraded and Mining Lands Management Vol 10, No 1 (2022)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2022.101.3961

Leakage or seepage in reservoirs and dams has the potential for structural instabilities persuaded by water leakage pathways and linked to economic consequences. An environmental isotopic and hydrochemical research was conducted to determine the source and origin of seepages on the tunnel of Pandanduri dam, Lombok Island, Indonesia. This study aimed to examine the source of the tunnel leak on the dam site and the origin or source of water at the point of leakage based on water chemistry data and stable isotopes. To identify the source of the leakage water in the tunnel dam, 33 samples of the leakage water, groundwater, reservoir water, river water, and rainfall water were taken for chemical and isotopic composition analysis. The field measured the reservoir level, spring discharges, and physicochemical parameters (EC, pH, TDS, TSS). The physicochemical parameters show that the leakages water is similar to reservoir water. The types of leakage water in the tunnel belong to alkaline water, predominantly sulfate-chloride. This type of water is deep groundwater with a higher sulfate and chloride concentration than surface water or shallow groundwater. Hydrochemical and isotope analysis showed that water origin at leakage points is dominated by groundwater.

Groundwater Chemistry Characterization in the South and Southeast Merapi Volcano, Indonesia Heru Hendrayana; Agung Harijoko; Indra Agus Riyanto; Azmin Nuha; Ruslisan Ruslisan
Indonesian Journal of Geography Vol 55, No 1 (2023): 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.76433

Merapi Volcano, which differs from volcanoes in other climates due to its location on the Indonesian Maritime Continent influenced by ENSO, ICTZ, and Moonsons, plays an essential role as a source of groundwater for the surrounding population. Some problems associated with groundwater in Mount Merapi are high utilization compared to other volcanoes worldwide, changes in land use, pollution, and its lowering table. Therefore, this study aims to compare the hydrogeological characteristics and aquifer systems of the southern and southeastern parts of Merapi Volcano. The hydrogeological characteristics were obtained from geological mapping, surface and subsurface, as well as rock XRF tests. Meanwhile, the hydrogeochemical characterization was determined through chemical data using the Trilinear Piper, Kurlov, Fingerprint, Composition, and Harker Diagram methods. The results of the Trilinear Piper, Kurlov, Fingerprint, and Composition Diagram methods show that Mount Merapi has 3, 7, 4, and 2 types of patterns different from other volcanoes in the world. On the other hand, the Harker diagram has the same pattern of Mg-Ca and Mg-Na as several other volcanoes. In conclusion, the hydrostratigraphy in the southern part of the volcano, consists of aquifuge, aquiclude, and aquifer, while in the southeast, there are aquitards of volcanic sandstone and tuff.

Co-Authors Agung Harijoko Agung Setianto Agus Budhie Wijatna Agus Budhie Wijatna Agus Budhie Wijatna Agus Budhie Wiyatna Agus Darmawan Adi Ahmad Rif’an Khoirul Lisan Alwan Satapona Amin, Muhammad Fakhriudin Falam Arif Fadillah Azmin Nuha Azmin Nuha Azmin Nuha Azmin Nuha Azmin Nuha Azmin Nuha Azmin Nuha Azmin Nuha Azwar Satry Muhammad Briyan Aprimanto Briyan Aprimanto Budiarjo Budiarjo Bunchoeun Pich Chhuon Kong Devy, Shalaho Dina Dharmawan, Krisna Indra Doni Prakasa Eka Putra Dony Prakasa Eka Putra Doung Rata Dwikorita Karnawati Erwindy, Jossi Harizona Aulia Rahman Hendy Setiawan Hiroshi Kawase Hnin Thandar Phyu I Gde Budi Indrawan I Wayan Warmada Indra Agus Riyanto Indra Agus Riyanto Indra Agus Riyanto Indra Agus Riyanto Indra Agus Riyanto Indra Agus Riyanto Ismayuni, Novia Jayanto, Galih Dwi Jinno, Kenji Kamai, Toshitaka Kawase, Hiroshi Kenji Jinno Keophousone Phonhalath Kong, Chhuon Leakhena Snguon M Widyastuti M. Widyastuti M. Widyastuti M. Widyastuti Muhammad Iqbal Muhammad Iqbal Muhammad, Azwar Satry Muhammad, Azwar Satrya Myo Thant Nuha, Azmin Phetnakhone Xaixongdeth Phonhalath, Keophousone Phyu Phyu Thin Phyu, Hnin Thandar Pich, Bunchoeun Ponhalath Xaixongdeth Rata, Doung Razi, Faizal Retno Wuryandari Retno Wuryandari, Retno Riyanto, Dwi Siswo Riyanto, Indra Agus Ruslisan Ruslisan Ryllia Ekklessia Ryllia Ekklessia, Ryllia S Sunarno Sabdo Sumartono Sambodo, Ahmad Priyo Satapona, Alwan Sato, Tsutomo Sato, Tsutomu Satoru Kawasaki Saw Aung Zaw Aye Shinta Dwi Novianti Snguon, Leakhena Solikh, Mochammad Wildanun Souvannachith, Thilavanh Subagyo Pramumijoyo Subagyo Pramumijoyo, Subagyo Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sudarmadji Sukandarrumidi Sukandarrumidi Sukandarrumidi Sukandarrumidi, Sukandarrumidi Sunarno Sunarno Sunarno Sunarno Sutikno Sutikno Sutikno Sutikno Sutikno Sutikno T. Putranto, Thomas Tetsuro Yoneda Thandar Phyu, Hnin Thant, Myo Thilavanh Souvannachith Thomas T. Putranto Thomas Triadi Putranto Thomas Triadi Putranto, Thomas Triadi Toshitaka Kamai Tsutomo Sato Tsutomu Sato Wahyu Wilopo Wawan Budianta Widyaningsih, Yuli Wiyatna, Agus Budhie Xaixongdeth, Phetnakhone Xaixongdeth, Ponhalath Yayi Ismanda Yoneda, Tetsuro Yosua Priambodo Yuli Widyaningsih Zaw Aye, Saw Aung

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