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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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Pemodelan Pergerakan Pencemar Airtanah oleh Hidrokarbon di Kelurahan Jlagran Kota Yogyakarta Harizona Aulia Rahman; Doni Prakasa Eka Putra; Heru Hendrayana
Jurnal Geosains dan Teknologi Vol 1, No 3 (2018): November 2018
Publisher : Universitas Diponegoro

Kebocoran tangki bahan bakar minyak untuk kereta api di Stasiun Tugu Yogyakarta pada tahun 1997 menyebabkan pencemaran airtanah pada sumur-sumur penduduk. Bahan bakar minyak (hidrokarbon) tergolong LNAPLs (Light Non Aqueous Phase Liquids), sukar larut dalam air. Penyebaran kontaminan (plume) pada airtanah dipengaruhi oleh biodegradasi. Penelitian terdahulu oleh Setyaningsih (2010) menyebutkan bahwa kecepatan aliran pada daerah penelitian adalah 1,5 km per tahun dalam kurun waktu 5 tahun, plume sudah mengalir jauh dari daerah penelitian. Berdasarkan informasi tersebut, sangat perlu diketahui arah pergerakan aliran airtanah dari 24 sumur observasi. Daerah penelitian merupakan bagian atas dari Sistem Akuifer Merapi (SAM) dengan penyusun endapan pasir dan endapan pasir krikilan, dengan aliran airtanah yang tidak seragam. Secara umum, aliran airtanah di daerah penelitian berarah utara-selatan. Di bagian selatan, aliran terpisah ke arah timur dan barat karena keberadaan sungai yang juga membatasi daerah penelitian. Hasil pengukuran dan analisa sampel airtanah menunjukkan 13 sumur observasi diindikasikan tercemar oleh hidrokarbon dengan plume sepanjang 325 m bergerak dari barat laut ke tenggara. Simulasi penyebaran pencemar dan konsentrasi hidrokarbon terlarut dibuat pemodelan menggunakan BIOPLUME III. Nilai kandungan hidrokarbon yang dipakai diambil dari data sumur, yaitu 1 mg/L hingga 50 mg/L. Pergerakan plume di daerah penelitian mengikuti arah aliran airtanah dan diestimasi mengalami penurunan konsentrasi kemudian hilang setelah 54 tahun. Nilai konsentrasi berkurang dari 50 mg/L menjadi 1,63 mg/L dengan rata-rata penurunan konsentrasi sebesar 7,95 mg/L selama 10 tahun.

Bio-geochemical simulation for solute transport in Piyungan landfill, Yogyakarta Special Province, Indonesia Keophousone Phonhalath; Dwikorita Karnawati; Heru Hendrayana; Doni Prakasa Eka Putra; Kenji Jinno
Journal of Applied Geology Vol 3, No 1 (2011)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Piyungan Landfill is the largest in Bantul Regency. According to water quality sampling taken from a leachate pond, there are significant contaminant issues resulting from landfill leachate. The objectives of this research were achieved by applying a two-dimensional bacteria mediated reduction numerical model was applied. Method of characteristic was applied to solve the advection part of the solute transport equation. Three bacteria (X1, X2, and X3) groups were defined in the redox model. In the conceptual model, bacterial X1 utilizes oxygen under aerobic conditions and nitrate, NO-3 under aerobic conditions as electron acceptors. Consequently, under aerobic conditions bacteria X2, and X3 utilize MnO2, and Fe(OH)3 respectively as electron acceptors. In the redox model organic carbon which was defined as CH2O was considered as the electron donor for all bacteria mediated reduction reactions. The results of research are to improve the understanding of biogeochemical processes in aquifer.

COASTAL AQUIFER GROUNDWATER MODELING IN THE SOUTHERN PART OF YOGYAKARTA AREA, INDONESIA Doung Rata; Doni Prakasa Eka Putra; Heru Hendrayana
Journal of Applied Geology Vol 4, No 1 (2012)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Parangtritis beach, located in a coastal aquifer at the southern part of Yogyakarta Province, Indonesia is bounded by the Indian Ocean at the South, Opak River at the West, and Tertiary Limestone Rock to the East. Local land-use is predominantly agriculture, rice fields and settlements and the population is estimated to be 9,386 persons as per the 2012 census. The total surface area is estimated at 9.46 km2. The aims of this research were to understand the system of groundwater and to assess and predict saltwater intrusion by conducting a numerical groundwater model. Hydrological and hydrogeological data were collected directly from the field and from previous work for input into the model. The model simulates an unconfined aquifer system where the aquifer thickness varies from 30-40 meters. The material of the aquifer consists of sand varying from fine to coarse grain size and fine gravel with hydraulic conductivity values of 8.974 × 10−4, 1.794 × 10−3, and 1.337 × 10−3 m/s at the northern, central, and southern part of the research area, respectively. The maximum length of the saltwater interface was estimated at about 205.1 m laterally and 40 m vertically relative to the location of the groundwater table around 1m above sea level. Direction of groundwater flow is from north to south. Groundwater table elevation equals 5 m at the north and 0 m at the south with a hydraulic gradient estimated at about 2.45 × 10−3. As a result of a steady-state simulation as well as two cases of prediction for five and ten years in the future, it is determined that that the salinity of the surrounding environment is not potentially adverse to the groundwater quality in the study area. This is in part due to low population in this area and abundant groundwater resources, as well as the results of the groundwater model. Keywords: Coastal aquifer, numerical groundwater model, conceptual model, observed heads

Copper Mobility Assessment Using Speciation Schemes: Case Study–Mantrijeron District, Yogyakarta, Indonesia Phetnakhone Xaixongdeth; Heru Hendrayana; Doni Prakasa Eka Putra; Dwikorita Karnawati; Tsutomu Sato
Journal of Applied Geology Vol 4, No 2 (2012)
Publisher : Geological Engineering Department Universitas Gadjah Mada

factors such physical and chemical properties, especially mineralogical composition of such environment. This study focused on the mineralogical of two soils types (fine sandy loam and loamy fine sand) to retain/mobile Cu. Two non contaminated soils from Yogyakarta urban area, Indonesia, were artificially contaminated with Cu solution. Subsequently, soils artificially contaminated were extracted from various geochemical phases of soil by sequential extraction procedure. The results show that both of soils types can retain Cu well with maximum is 5.8 mg/g of loamy fine sand and 3.9mg/g of fine sandy loam. Additionally, the iron amorphous phase content in clay fraction is influence Cu retains in these soils. This is advantage in environment of Yogyakarta urban area, Indonesia, where this area underlain by loamy sand soil. Keywords: Copper, mobility, iron, sequential extraction.

ASSESSMENT OF OPTIMUM YIELD OF GROUNDWATER WITHDRAWAL IN THE YOGYAKARTA CITY, INDONESIA Doni Prakasa Eka Putra; Muhammad Iqbal; Heru Hendrayana; Thomas Triadi Putranto
Journal of Applied Geology Vol 5, No 1 (2013)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The high demand of clean water supply and groundwater usages in Yogyakarta City, Indonesia has caused the lowering of groundwater table of about 3 m in average since 1984. This condition is caused by the increase number of groundwater pumping in this city relate to the rising of the urban population, economics condition, education and cultural activities, change of land use and increase number of hotels on this famous tourism city in Indonesia. Therefore, it became necessary to assess the optimum yield from the groundwater system beneath this city which can still preserve the recent level of shallow groundwater. This is important because most of the people in this city depends their daily water supply from shallow dug well. In order to assess the safe yield, a groundwater modeling is conducted. The data used on this modeling was taken from previous research and also primary data collected during this research such as; aquifer geometry, aquifer characteristics, shallow groundwater level, water usage/pumping wells discharge, river discharge and surface water level, and climate data. Prediction of the impact of groundwater pumping was made by increasing the water usage/pumping wells discharge on several scenarios. The result of this modeling shows that the optimum yield of the aquifer beneath Yogyakarta City area is about 125,000 m3/day. Keywords: Optimum yield, groundwater usage, groundwater table, pumping, urban population, shallow dug well.

Determination of suitable groundwater quality for agriculture by using GIS application in Bantul Regency, Yogyakarta Special Province, Indonesia Chhuon Kong; Heru Hendrayana; Agung Setianto
Journal of Applied Geology Vol 5, No 2 (2013)
Publisher : Geological Engineering Department Universitas Gadjah Mada

irrigation purposes within Bantul area which is located on Yogyakarta Volcanic Groundwater Basin, 47 existing data points were used complementary with the results of 30 groundwater samples analysis which were collected from dug and tub wells in various locations of study area. ECw, TDS, pH and major cations: Na+, Ca2+, Mg2+, K+,and anions: Cl????, HCO???? 3 , SO2???? 4 , NO???? 3 were analyzed as evaluation index. The relative tendency of ion in epm shows Ca2+>K+>Na+>Mg2+ and HCO???? 3 >Cl????>SO2???? 4 . Variations in groundwater composition by using Mg/Ca vs. Na/Ca molar ratio indicates that the groundwater is close to silicate rock with influence of clastic carbonate rock. Higher salinity approach to the west of the Bantul indicates that groundwater quality is controlled by clastic carbonate rock and expose limestone of Sentolo hills. Groundwater samples fall under class I suggested that groundwater is good and suitable for irrigation based on Doneen’s classification of permeability index and 78.37% is in excellent category by Wilcox classification on N%. According to the SAR values plotted in the USSL diagram, the majority of the groundwater samples belong to C2-S1 and C2-S2 class, indicating medium salinity and low sodium water which can be used for irrigation with little danger. The suitability of groundwater quality for agriculture is determined by thematic maps produced from ArcGIS Spatial Analyst based on FAO guideline. Salinity is the significant problem that has slight to moderate restriction effect on crops productivities in this area. The ECw map indicates that good groundwater quality for crops is at the middle to the east of study area close to Opak River, while at the western irrigation water is affected but yielding no reduction on rice productivity. However, it has slight to moderate restriction on sensitive crops indicated in thematic map of crops land with different yield potential. The agricultural land in which has yield potential of 100%, 90% and 75% is about 2727.90 ha (38.56%), 735.49 ha (10.39%) and 208.98 ha (2.95%) of the study area respectively. Key words: Irrigation groundwater quality, total dissolved solids (TDS), electrical conductivity (EC), evaluation index, ArcGIS Spatial Analyst, FAO guideline, yield potential.

MODIFIED NATURAL ZEOLITE AND BENTONITE AS ADSORBENTS OF HEAVY METAL IONS FROM POLLUTED GROUNDWATER IN YOGYAKARTA URBAN ARE, INDONESIA Bunchoeun Pich; I Wayan Warmada; Heru Hendrayana; Tetsuro Yoneda
Journal of Applied Geology Vol 2, No 1 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Groundwater quality in Yogyakarta city has become the major concern due to the presence of heavy metals originated from batik home industries, slaughterhouses, and leather factories, especially in shallow groundwater. In response to the above problems, the naturally abundant zeolite and bentonite in Sidomulyo and Bandung areas were respectively sampled along with the metal-containing groundwater in Yogyakarta urban area for batch adsorption experiment. Before put into experiment, the zeolite and bentonite were characteristically investigated by means of XRD, SEM, chemical composition, and physical property analyses. Also, they were thermally activated to improve their qualities in terms of increase in CEC, whereas the groundwater was analyzed for heavy metal concentrations (Cd, Cr, Cu, Fe, Zn) and its physical property. Five logarithmic amounts of this modified zeolite or bentonite were separately and incrementally introduced into the same three solutions of heavy metals. After the experiment, all the solutions were re-analyzed for the rest of heavy metals to figure out the optimum adsorption capacity of zeolite and bentonite. The outcomes of this experiment will be beneficial in enhancing the groundwater quality for consumptions in Yogyakarta city as well as other places in Indonesia, and will also imply the zeolite and bentonite in commercialization. Keywords: zeolite, bentonite, groundwater, heavy metal, adsorption

ESTIMATION OF MAXIMUM EARTHQUAKE MAGNITUDE OF EARTHQUAKE POTENTIALS FOR YOGYAKARTA DEPRESSION AREA, INDONESIA Myo Thant; Subagyo Pramumijoyo; Heru Hendrayana; Hiroshi Kawase; Agus Darmawan Adi
Journal of Applied Geology Vol 2, No 1 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Maximum magnitudes of earthquake potentials are estimated for Yogyakarta depression area by using the faultlength and earthquake magnitude relations for fault specific seismic sources. For estimation of maximum earthquake magnitude, the fault specific seismic sources are modeled as 18 normal faults and 6 strike-slip faults sources referring the geological map of McDonald, 1984 and Rihardjo et al., 1995. For the present area the subduction zone earthquakes are expected to happen in the offshore region regarding the study on the seismicity of the region and the focal mechanisms of the past earthquakes. So three area sources are also assumed for this region and the possible maximum earthquake magnitudes for these sources are determined by probabilistic approaches.

JATIBARANG LANDFILL OF SEMARANG CITY: IS IT POTENTIAL AS THE WATER CONTAMINATION SOURCE? Heru Hendrayana; Doni Prakasa Eka Putra; Thomas T. Putranto; Ponhalath Xaixongdeth
Journal of Applied Geology Vol 2, No 1 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Like other million inhabitants Cities, Semarang which is the capital city of Central Java Province in Indonesia has a problem in solid waste management. One biggest landfill in the City is the Jatibarang Landfill. The landfill operated since 1992 and currently receives the domestic waste of about 337 ton/day with total volume of about 5.2 million m3 of solid waste. It located on the hill slope of sandstone tertiary rocks and relatively closed to the river of Kreo (which is the main source of drinking water for Semarang City). In order to evaluate the potentiality of landfill as the contamination source to groundwater and surface water, the quality of leachates were analyzed and the hydrogeology of the area was re-studied. Result of the study show that the leachates contain high chloride concentration of about 2600 mg/L however low concentration of heavymetals. Hydrogeology study show evidence that this leachate is already enters the groundwater system. However its load to the river can be neglected due to the fact that the chloride mass flux derived from the study area was significantly low comparing to the net river loads. Key Word: landfill, water contamination, chloride, groundwater and surface water interaction

Evaluation of strong ground motion for Yogyakarta depression area, Indonesia Myo Thant; Subagyo Pramumijoyo; Heru Hendrayana; Hiroshi Kawase; Agus Darmawan Adi
Journal of Applied Geology Vol 2, No 2 (2010)
Publisher : Geological Engineering Department Universitas Gadjah Mada

The probabilistic seismic hazard maps are developed for Yogyakarta depression area. The earthquake catalog of ANSS (1970-2007) is taken into account with the complement of NEIC (USGS, 1973-2007) and the records of BMG (2000-2004). On the basis of seismicity of the area, tectonics and geological information, the seismic source zones are characterized for this area. The seismicity parameters of each seismic source are determined by applying the classical Gutenberg-Richter recurrence model, regarding the historical records. The attenuation relation for Yogyakarta depression area cannot be evaluated since the sufficient strong ground motion records are not available for this region. Therefore the attenuation relations which were developed for other territories as Europe and Japan are used for the present hazard calculation by validating, using the aftershocks records, modeling the peak ground acceleration maps for the recent event, 27 May, 2006, Yogyakarta earthquake inserting the damage area distribution pattern. The probabilistic seismic hazard maps are finally developed by using the McGuire (1976) EQRISK computer program by modifying for the present purpose. The seismic hazard maps expressed in term of peak ground acceleration are developed for the recurrence intervals of 10, 50, 100, 200 and 500 years

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 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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