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All Journal Tunas Geografi Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Journal of Applied Geospatial Information ASEAN Journal on Science and Technology for Development
Hendy Fatchurohman
Department Of Geo-Informatics, Vocational College, Universitas Gadjah Mada, Sekip Unit 1 Catur Tunggal, Yogyakarta 55281, Indonesia
Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Mathematics Physics Other

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INDEKS PEMAKAIAN AIRTANAH DI KOTA YOGYAKARTA Ahmad Cahyadi; Indra Agus Riyanto; Hendy Fatchurohman; Sigit Heru Murti Budi Santosa; Raras Endarto
Tunas Geografi Vol 9, No 1 (2020): JURNAL TUNAS GEOGRAFI
Publisher : Department of Geography Education, Faculty of Social Sciences, Universitas Negeri Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24114/tgeo.v9i1.17630

Abstract

The rapid development of the city causes an increase in the amount of water that needed to support various activities. The Utilization of groundwater in large quantities causes negative impacts such as the decrease in groundwater level so that people are difficult to access groundwater. The aim of this study is to analyze the index of groundwater use which describe the condition of groundwater use in the city of Yogyakarta. The groundwater use index is calculated by dividing the total water demand and the availability of groundwater in the City of Yogyakarta. The result shows that in general groundwater use in the city of Yogyakarta is categorized in the safe enough classification (III). However, in the shallow groundwater use index there is one area with less safe classification (II) namely Kotagede District, and one area with unsafe classification (I) namely Umbulharjo District. The main factor which influence to the high index of shallow groundwater use is large population that causes high water domestic needs. This is reflected in the percentage of water domestic needs reaching 90.43%.Keywords: Groundwater, Index of Groundwater Use, Yogyakarta City Perkembangan kota yang pesat menyebabkan semakin banyak jumlah air yang dibutuhkan untuk menunjang berbagai kegiatan di dalamnya. Pemanfaatan airtanah dalam jumlah yang besar menyebabkan dampak negatif seperti penurunan muka airtanah, sehingga masyarakat sulit untuk mengakses airtanah tersebut. Penelitian ini bertujuan menganalisis indeks pemakaian airtanah yang diharapkan dapat menggambarkan kondisi penggunaan airtanah di Kota Yogyakarta. Indeks pemakaian airtanah dihitung dengan membagi total kebutuhan air dengan ketersediaan airtanah di Kota Yogyakarta. Hasil analisis menunjukkan bahwa secara umum pemakaian airtanah di Kota Yogyakarta masuk dalam  klasifikasi cukup aman (III). Namun demikian pada indeks pemakaian airtanah dangkal terdapat satu wilayah dengan klasifikasi kurang aman yakni Kecamatan Kotagede, dan satu wilayah dengan klasifikasi tidak aman, yakni Kecamatan Umbulharjo. Faktor utama yang berpengaruh tingginya indeks pemakaian airtanah dangkal adalah jumlah penduduk yang sangat besar yang menyebabkan kebutuhan air domestik yang sangat tinggi. Hal tersebut tergambar dari nilai persentase kebutuhan domestik yang mencapai 90,43%Kata Kunci: Airtanah, Indeks Pemakaian Airtanah, Kota Yogyakarta
Mapping Archaeological Site of Keraton Pleret Using Aerial Photograph Warsini Handayani; Bagus Arif Setiawan; Bayu Argadyanto Prabawa; Taufik Hery Purwanto; Fredi Satya Candra Rosaji; Hendy Fatchurohman
Journal of Applied Geospatial Information Vol 4 No 1 (2020): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.29 KB) | DOI: 10.30871/jagi.v4i1.1994

Abstract

As a cultural heritage, Site of Keraton (Palace) Pleret becomes an essential relic in Javanese history and culture to preserve and deliver ancient information for the next generation sustainably. On the other hand, this preservation is dealing with quite rapid built-up area development. Mapping can be a significant effort as primary data in cultural preservation management. This study aims to make a detailed site map of the Keraton Pleret and identify the existing land use in each site component. Through remote sensing data interpretation and analysis, identification and mapping of archaeological sites done by matching previous archaeological documents, field conditions, digital orthophoto from aerial photography, and digital topographic data (digital surface models, DSM). Site components were identified firstly by matching the existence of the street network and river from a topographic map with orthophoto to obtain site orientation based on artificial infrastructure and existing natural features. It was followed by matching between Keraton Pleret blueprint document, previous archaeological information, and orthophoto to identify and locate each site component. Existing land use information obtained by orthophoto interpretation. Data analysis shows the compatibility between spatial data used in this research and previous documents to identify components and result in Keraton Pleret site map. At present, most of the Keraton Pleret site area has been converted to buildings and paddy fields, strengthen the need for archaeological sites management which alongside community activities.
Flood Inundation Modeling Using Geomorphic Approaches, UAV, and GIS Dhoni Wicaksono; Lufti Gita Iriani; Hendy Fatchurohman; Taufik Hery Purwanto; Dwi Setyo Aji; Warsini Handayani; Alfiatun Nur Khasanah
Journal of Applied Geospatial Information Vol 4 No 1 (2020): Journal of Applied Geospatial Information (JAGI)
Publisher : Politeknik Negeri Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5.316 KB) | DOI: 10.30871/jagi.v4i1.2047

Abstract

Flood is one of the most frequently occurring natural disasters in Indonesia. At the end of 2017, Tropical Cyclones Cempaka and Dahlia formed over the Indian Ocean, inducing extreme rains and floods in some parts of Java Island. The Special Region of Yogyakarta was among the most affected areas, especially along the Oyo River section in Imogiri District. This research was designed to identify and map the flood-prone areas in the district as part of flood mitigation measures. For this purpose, The Unmanned Aerial Vehicle (UAV) technology was used to not only provide a detailed and up-to-date description but also produce aerial photographs (orthoimages) and Digital Elevation Model (DEM). These two products were inputted to the inundation modeling developed with a geomorphic approach and simulated in a Geographic Information System (GIS). In terms of accuracy, the resulting models were quite reliable for mapping on a detailed scale and only slightly deviated from the traced inundation in the field. Also, five areas (sub-village) were found with the highest vulnerability to floods, namely, Trukan, Butuh, Dogongan, Siluk Satu, and Kedung Miri.
Analyzing the Characteristics of Domestic Wastes in Belik River, the Special Region of Yogyakarta, Indonesia Slamet Suprayogi; Muh Aris Marfai; Ahmad Cahyadi; Reviana Latifah; Hendy Fatchurohman
ASEAN Journal on Science and Technology for Development Vol. 36 No. 3 (2019): Ahead of the Storm
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29037/ajstd.591

Abstract

The multiplying number of population in the City of Yogyakarta has resulted in a larger volume of wastes in the region. People living on the riverbanks are unfortunately in the habit of discarding domestic waste directly to the river channel, worsening the already polluted water. This study was intended to analyze the characteristics of the municipal wastewater contaminating Belik River. During the water quality test, a rapid investigation method and laboratory analysis were employed. The sampling in the field was based on river segments and travel time of river water. Based on the laboratory test results, the concentrations of phosphate, BOD, and COD in the water bodies had exceeded the standard for Class II water quality indicating pollution due to frequent disposal of household wastes like detergents. The higher the BOD and COD levels, the more unsuitable the water for fisheries and agricultural practices.
Analisis Kondisi Hidrologi terhadap Perkembangan Wilayah Perkotaan Studi Kasus DAS Kali Belik Yogyakarta Slamet Suprayogi; Hendy Fatchurohman; M Widyastuti
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 16, No 2 (2019)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v16i2.22364

Abstract

Perkembangan yang pesat di daerah Kota Yogyakarta memberikan berbagai konsekuensi dari sisi hidrologi. Perubahan lahan terbangun untuk memenuhi kebutuhan fasilitas fisik kota sangat cepat, seperti bangunan, jalan, dan tempat parkir. Kondisi ini akan merubah fungsi lahan sebagai satu kesatuan proses hidrologi, yakni lahan-lahan yang awalnya menyerap air  menjadi kedap air. Alih fungsi lahan yang diikuti oleh peningkatan aliran permukaan akan berpengaruh terhadap sumberdaya air baik dari segi kualitas maupun kuantitas. Hasil dari penelitian adalah terjadi perubahan penggunaan lahan di DAS Belik, yaitu berupa pengurangan lahan bervegetasi dan peningkatan lahan terbangun. Perubahan penggunaan lahan ini menyebabkan peningkatan koefisien aliran dan Curve Number (CN) di DAS Belik. Selain menyebabkan peningkatan koefisien aliran dan CN, peningkatan lahan terbagun juga menjadi sumber pencemar airtanah. Besarnya limbah domestik (detergen) dan sumber pencemar organik yang disebabkan konstruksi septictank yang terlalu dekat dengan sumur menyebabkan nilai phospat, nitrat, dan coliform jauh melebihi baku mutu air kelas 1. Kemudian arah aliran airtanah di DAS Belik bergerak dari hulu menuju ke arah hilir/selatan dengan potensi debit mencapai 104 liter/detik. Jika airtanah tercemar, maka konsentrasi pencemaran terbesar akan terjadi di bagian hilir DAS Belik.The consequence of rapid urbanization in the city of Yogyakarta lead to hydrological system change. Population and economic growth are the main reason for the increase in living place demand in the city of Yogyakarta. Landuse change is the impact of urban sprawl, which lead to the diminishing of groundwater resources and the increasing of overland flow. The extension of the built area that reaches the peri-urbans area and countryside will absolutely affect the quality and quantity of water resources.  The results show that landuse conversion occurred in several landuses in the sub-watershed of Belik. The main landuse change that detected from 2003-2012 is the diminishing of vegetated land and the increasing number of built area. Land conversion increased the run-off coefficient and Curve Number, that lead into the contamination of groundwater. The concentration of phosphate and coliform in almost all points exceeds the minimum standard of potable water. These results indicate that domestic wastewater and septic tank misconstructions play important role toward groundwater contamination. From the flownets construction, it shows that the groundwater flow from the northern part into southern part of  Belik sub-watershed with potential discharge up to 104 liter/second. There is also possibility for groundwater contamination to extent and reach the downstream area. the water resources.
Co-Authors Ahmad Cahyadi Ahmad Cahyadi **) Alfiatun Nur Khasanah Bagus Arif Setiawan Dhoni Wicaksono Dwi Setyo Aji Fredi Satya Candra Rosaji Indra Agus Riyanto Lufti Gita Iriani M Widyastuti Muh Aris Marfai Raras Endarto Reviana Latifah Sigit Heru Murti Slamet Suprayogi Slamet Suprayogi Taufik Hery Purwanto Taufik Hery Purwanto Warsini Handayani Warsini Handayani