Articles

DISTRIBUTION OF NITRATE HOUSEHOLD WASTE AND GROUNDWATER FLOW DIRECTION AROUND CODE RIVER, YOGYAKARTA, INDONESIA Muryanto, Muryanto; Suntoro, Suntoro; Gunawan, Totok; Setyono, Prabang; Nurkholis, Afid; Wijayanti, Nurisa Fajri
Indonesian Journal of Geography Vol 51, No 1 (2019): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2052.8 KB) | DOI: 10.22146/ijg.43420

Abstract

The nitrate concentrations in shallow groundwater of the Yogyakarta City and its surroundings has increased to about twenty times in the period 1985-2018. The objective of this study was to analyse the distribution of nitrate concentrations in water well around the Code River, Yogyakarta. Flownets mapping was performed to find out the distribution and direction of potential groundwater pollution. Nitrate concentration was analysed by taking 18 groundwater samples scattered in the upstream, midstream and downstream areas of the Code River. The results of this study indicate that nitrate concentrations in the water well of upstream and downstream areas could still be used as a source of drinking water and recreation-irrigation-livestock. Meanwhile, the nitrate concentration in water well of the midstream area of the Code River, Yogyakarta City, mostly (80% of the sample) did not meet all classes of water quality standards. Human activities in the densely populated settlements were the main factors that influence nitrate pollution. Furthermore, groundwater flow in the study area leads from north to south and towards the Code River. This condition indicates that the nitrate concentrations in  the groundwater can be a source of a pollutant for the Code River.
PEMETAAN FAKTOR C YANG DITURUNKAN DARI BERBAGAI INDEKS VEGETASI DATA PENGINDERAAN JAUH SEBAGAI MASUKAN PEMODELAN EROSI DI DAS MERAWU Sulistyo, Bambang; Gunawan, Totok; Hartono, Hartono; Danoedoro, Danoedoro
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 18, No 1 (2011)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Penelitian ini bertujuan untuk mengkaji berbagai indeks vegetasi yang diturunkan dari data penginderaan jauh dalam pemetaan faktor C sebagai masukan dalam pemodelan erosi USLE (Universal Soil Loss Equation). Metode yang digunakan dalam penelitian ini adalah dengan menganalisis data penginderaan jauh Landsat 7 ETM + sehingga menghasilkan berbagai indeks vegetasi yang kemudian dilakukan analisis korelasi dengan Faktor C yang diukur di lapangan pada 45 lokasi. Dari analisis ini diperoleh suatu model untuk pemetaan faktor C (C model ) dari berbagai indeks vegetasi. Peta faktor C yang diperoleh kemudian dilakukan validasi pada 48 lokasi sehingga akan diketahui keakuratan hasil pemodelan. Dalam penelitian ini dikaji 11 (sebelas) indeks vegetasi yang diturunkan dari data penginderaan jauh, yaitu ARVI, MSAVI, TVI, VIF, NDVI, TSAVI, SAVI, EVI, RVI, DVI, dan PVI. Hasil penelitian menunjukkan bahwa dari 11 indeks vegetasi yang dikaji terdapat 8 indeks vegetasi yang menghasilkan peta faktor C dengan ketelitian yang tinggi, yaitu MSAVI, TVI, VIF, NDVI, TSAVI, SAVI, EVI, dan RVI. Indeks vegetasi yang menggunakan rumus yang lebih kompleks menghasilkan koefisien korelasi yang lebih tinggi dibanding dengan indeks vegetasi yang menggunakan rumus yang sederhana. Indeks vegetasi yang mempertimbangkan latar belakang tanah (MSAVI dan TSAVI) mempunyai koefisien korelasi lebih tinggi dibanding dengan koefisien korelasi yang tidak mempertimbangkan latar belakang tanah.
JASA DAN ETIKA LINGKUNGAN UNTUK PENGENDALIAN AIR DAN BANJIR SEBAGAI DASAR PENGELOLAAN DAS SERANG Setyawan, Agung; Gunawan, Totok; Dibyosaputro, Suprapto; Giyarsih, Sri Rum
JURNAL PEMBANGUNAN WILAYAH & KOTA Vol 14, No 4 (2018): JPWK Vol 14 No 4 Desember 2018
Publisher : Magister Pembangunan Wilayah dan Kota,Undip

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (749.59 KB) | DOI: 10.14710/pwk.v14i4.21096

Abstract

Penelitian ini merupakan kasus di DAS Serang Kabupaten Kulonprogo D.I. Yogyakarta. Bertujuan untuk menilai sebaran spasial jasa lingkungan untuk pengaturan tata air dan banjir sebagai dasar untuk Pengelolaan kelestarian sumberdaya air DAS di DAS Serang, Kabupaten Kulonprogo D.I. Yogyakarta. dengan metode dengan pendekatan jasa lingkungan menggunakan dua variable penaksir yaitu penggunaan lahan dan ecoregion. Masing-masing variable dinilai jasa lingkungannya terhadap pengaturan tata air dan banjir, yang kemudian disintesis menggunakan metode AHP menghasilkan nilai koefisien jasa lingkungan pengaturan tata air dan banjir. Dari nilai koefisien tersebut diolah dan dianalisis dengan teknis GIS menghasilkan sebaran spasial nilai jasa lingkungan pengaturan tata air dan banjir yang kemudian dilakukan pembagian kelas menjadi 5 kelas jasa lingkungan pengaturan tata air dan banjir yaitu kelas sangat tinggi, tinggi, sedang, rendah dan sangat rendah. Hasil dari penelitian ini menunjukkan bahwa: untuk DAS Serang Kabupaten Kulonprogo D.I. Yogyakarta pada daerah hulu berpontensi sebagai jasa pengaturan tata air dan banjir. Terutama di Kecamatan Kokap dengan persentase luasan jasa lingkungan pengaturan tata air dengan kelas sangat tinggi sebesar 85% dari luas Kecamatan Kokap. Sedangkan untuk etika lingkungan DAS serang Kab Kulonprogo D.I. Yogyakarta terdapat tiga kelas etika lingkungan di wilayah DAS yaitu untuk wialayah Hulu mempunya kelas Etika Lingkungan Rendah, Wilayah tengah kelas etika lingkungan sedang dan wilayah hilir kelas etika lingkungan.
GREENHOUSE GAS POLLUTION BASED ON ENERGY USE AND ITS MITIGATION POTENTIAL IN THE CITY OF SURAKARTA, INDONESIA Setyono, Prabang; Himawan, Widhi; Sari, Cynthia Permata; Gunawan, Totok; Murti, Sigit Heru
Indonesian Journal of Geography Vol 52, No 1 (2020): 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.48802

Abstract

Considered as a trigger of climate change, greenhouse gas (GHG) is a global environmental issue. The City of Surakarta in Indonesia consists mainly of urban areas with high intensities of anthropogenic fossil energy consumption and, potentially, GHG emission. It is topographically a basin area and most likely prompts a Thermal Inversion, creating a risk of accumulation and entrapment of air pollutants or GHGs at low altitudes. Vegetation has been reported to mitigate the rate of increase in emissions because it acts as a natural carbon sink. This study aimed to mitigate the GHG emissions from energy consumption in Surakarta and formulate recommendations for control. It commenced with calculating the emission factors based on the IPCC formula and determining the key categories using the Level Assessment approach. It also involved computing the vegetation density according to the NDVI values of the interpretation of Sentinel 2A imagery. The estimation results showed that in 2018, the emission loads from the energy consumption in Surakarta reached 1,217,385.05 (tons of CO2e). The key categories of these emissions were electricity consumption, transportation on highways, and the domestic sector, with transportation on highways being the top priority. These loads have exceeded the local carrying capacity because they create an imbalance between emission and natural GHG sequestration by vegetations.
PENERAPAN ETIKA LINGKUNGAN DALAM PENGELOLAAN WILAYAH KEPESISIRAN TUBAN Atikawati, Dini -; Gunawan, Totok; Sunarto, Sunarto
Jurnal Geografi (Geografi dan Pengajarannya) Vol 17, No 1 (2019): Jurnal Geografi dan Pengajarannya
Publisher : Fakultas Ilmu Sosial dan Hukum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jggp.v17n1.p1-10

Abstract

Wilayah kepesisiran Tuban memiliki sumberdaya pesisir yang melimpah. Masyarakat pesisir Tuban memanfaatkannya untuk perikanan, wisata, dan permukiman. Berbagai macam pemanfaatan tersebut menimbulkan terjadinya kerusakan lingkungan, sehingga dipandang perlu untuk menerapkan etika lingkungan dalam pengelolaan wilayah kepesisiran Tuban. Penelitian ini bertujuan untuk mengidentifikasi profil wilayah kepesisiran Tuban, mengkaji dinamika pantai di Tuban, mengkaji perilaku masyarakat terhadap wilayah kepesisiran Tuban, dan merumuskan penerapan etika lingkungan dalam pengelolaan wilayah kepesisiran Tuban. Data diperoleh melalui observasi, pengukuran, wawancara, dan potret lapangan. Analisis data yang digunakan yaitu deskriptif dan skoring. Hasil penelitian menunjukkan bahwa wilayah kepesisiran Tuban di daerah penelitian memiliki dua jenis pantai, yaitu pantai berbatu dan berpasir. Keempat daerah penelitian memiliki hidrologi yang tawar. Keanekaragaman flora dan fauna pesisir paling tinggi di Desa Panyuran, sedangkan paling rendah di Desa Karangagung. Dinamika pantai di daerah penelitian yaitu erosi, akresi, dan keadaan seimbang. Erosi pantai terjadi di Desa Karangagung dan Kelurahan Kutorejo. Akresi terjadi di Desa Panyuran. Keadaan seimbang terjadi di Kelurahan Sukolilo. Nilai perilaku masyarakat terhadap wilayah kepesisiran masih tergolong rendah. Etika lingkungan dalam pengelolaan wilayah kepesisiran Tuban dilakukan dengan penerapan paradigma biosentrisme dan ekosentrisme.
KAJIAN ETIKA LINGKUNGAN KEPESISIRAN TUBAN BERDASARKAN NILAI WILAYAH KEPESISIRAN Atikawati, Dini; Gunawan, Totok; Sunarto, Sunarto
ECOTROPHIC : Jurnal Ilmu Lingkungan (Journal of Environmental Science) Vol 13 No 1 (2019)
Publisher : Master Program of Environmental Science, Postgraduate Program of Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/EJES.2019.v13.i01.p12

Abstract

Tuban coastal area is very rich in natural resources and environmental services. Along the coastal area there are many infrastructures and activity centers. Various forms of existing activities and uses have negative impact, so Tuban coastal area is vulnerable to environmental damage. Prevention efforts that can be done are through the study of environmental ethics. This research aims to study the value of Tuban coastal area, assess the environmental ethics of community in Tuban coastal area, and formulate the coastal environmental ethics of Tuban based on coastal area values. The data were collected from observation, field portraits, and interviews. Then the data were analysed by scoring and descriptive. The results showed that the highest coastal area values in Karangagung, Panyuran, Sukolilo and Kutorejo is economic value. The highest environmental ethics values is in Kutorejo, while the lowest is in Karangagung. Coastal environmental ethics of Tuban are formulated based on eleven coastal area values ??that contain of behaviors that should be carried out by coastal communities so that the sustainability of Tuban coastal area can be maintained. Keywords: environmental ethics; coastal area values; management, attitudes; coastal area
PENGEMBANGAN METODE BANGKITAN DAN TARIKAN PERJALANAN BERDASARKAN CITRA QUICKBIRD Dg Bau, Qadriathi; Hartono, Hartono; Parikesit, Danang; Gunawan, Totok
Jurnal Transportasi Vol 13, No 2 (2013)
Publisher : Jurnal Transportasi

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Abstract

As a basic model, trip generation model aims to obtain the number of movement generated by each origin and the one attracted to each destination zone. Based on the movement, trip generation model is categorized into home-based trip generation and non home-originated/destinated trip attraction. Given that the different types of activities attract trips with different characteristics, it can be concluded that land use management determines the movement and activities. Remote sensing imagery has been extensively used in various research themes including land use management or land use and detailed land utility. As one of the remote sensing imageries, Quickbird imagery is advantageous with its high spatial resolution which is 0.61 cm. Therefore, it is interesting to apply the 0.61 cm spatial resolution to the trip generation model to estimate the number of trips at the trip generation. This aims is to minimize field activities which are high cost, extensive workers, and relatively time consuming.Keywords: trip generation model, trip attraction, quickbird imagery
ISOLATES AND ENUMERATION OF BACTERIA ON THE EXPANSE OF PEAT SOIL IN THE DAS KAMPAR RIAU SUMATERA Irma, Wirdati; Gunawan, Totok; Suratman, Suratman
Jurnal Perikanan dan Kelautan Vol 24, No 1 (2019)
Publisher : Universitas Riau

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Abstract

Utilization of Remote Sensing Techniques for Monitoring and Evaluation of Solo Watershed Management Gunawan, Totok
Forum Geografi Vol 17, No 2 (2003)
Publisher : Forum Geografi

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Abstract

This research is an application of remote sensing technology for monitoring and evaluation of watershed management, which was conducted is Solo Watershed, Central and East Java. The research objectives were 1) to investigate the capability of photomorphic analysis of Landsat Thematic Mapper (TM) and Enhanced Themmatic Mapper (ETM +) imagery as the basic for analyzes of landforms, landuse, and morphometry of the land surface; 2) to calculate the overland flow – peak discharge and erosion – sediment yield as indicators of land degradation of the area; 3) to use the indicators as set of instrument for monitoring and evaluation of watershed management. In this study, visual interpretation by means of on-screen digilization of the digital imagery was carried out in order to identify and to delineate land parameters using photomorphic approach. Based on the photomorphic analysis, several image – based parameters such as relief topography, physical soil characteristic, litho – stratigraphy, and vegetation cover were integrated with other themati maps in a geographic information system (GIS) environment. Estimation of overland flow (C) based on Cook methods (1942) and calculation of peak disccharge (Qmax) based on rational method (Qmax = C. I. A) were applied. Meanwhile, estimation of surface erosion was carried out using Universal Soil Loss Equation (USLE, A = R. K. L. S. CP). The sediment yield (Sy) was estimated using seddiment delivery ratio ( SDR) based on the following formula: Sy = [A + (25% x A)] x SDR. Both pairs of C – Qmax and A – Sy, were utilized as the basis for monitoring and evaluation of the watershed. The combination of C – Qmax and A – Sy were also used as the basis for selection of stream gauge setting / AWLR within particular sub – catchment. It was found that the photomorphic analysis is only color/tone, slope aspects, pattern, and texture, unit boundaries between volcanic – origin landscape (Wilis volcanic complex) and folded – hills landforms (Kendeng ridges) can be delineated. Within the volcanic features, coarse – textured units indicating pyroclastic materials with high drainage density (western part of Lawu volcano). In terms of calculated overland flow and peak discharge of 100 sub – catchment within the Solo Watershed, it was found that there are four sub – catchment with relatively high values (> 0.60 and > 1200 m3s1 for overland flow and peak discharge repectively), namely Samin (Karanganyar), Keduang (Wonogiri), Dengkeng (Klaten), and Sungkur (Ponorogo). Five sub-catchment might be categorized as having moderate peak discharge (Qmax ranges from 1000 – 1200 m3s1), namely Ketonggo (Ngawi), Keyang (Ponorogo), Gandong – Semawur (Magetan), Pepe (Boyolali), and Soko (Bojonegoro), while the remaining 91 sub-catchments are categorized as having low peak discharge. Based on the calculation of erosion and sediment yield, there was no sub-catchment with moderate category (60 – 180 ton ha1yr1), i.e. Samin (Karanganyar), Gonggong (Magetan), Ngisip and Kedung Cilik (Tuban), and Pepe (Boyolali). The other 95 sub-catchment might be categorized as gentle to good. In terms of values representing overland flow – flood and erosion – sediment yield, there are several sub-catchments require first priority in monitoring and evaluation, and are recommended as suitable sites for stream gauge setting, i.e. Samin (Karanganyar), Gonggong (Magetan), Ngisip and Kedung Cilik (Tuban).
NILAI EKONOMI KARBON HUTAN RAWA GAMBUT MERANG KEPAYANG, PROVINSI SUMATERA SELATAN Ulya, Nur Arifatul; Warsito, Sofyan P.; Andayani, Wahyu; Gunawan, Totok
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 22, No 1 (2015)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

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Abstract

Hutan rawa gambut menyimpan cadangan karbon baik di tanah maupun di atas tanah. Hutan Rawa Gambut Merang Kepayang (HRGMK) merupakan kawasan hutan yang berada di kubah gambut terbesar di Sumatera Selatan, yaitu Kubah Gambut Merang (KGM), yang didalamnya terdapat gambut dengan ketebalan lebih dari 3 meter. Meskipun menurut aturan KGM seharusnya dikonservasi, pada kenyataannya kawasan HRGMK dihadapkan pada konversi. Konversi HRGMK diduga akan mengakibatkan terganggunya fungsi hutan rawa gambut sebagai cadangan karbon dunia sehingga akan menyebabkan terjadinya emisi karbon ke atmosfer dalam jumlah besar. Penelitian ini bertujuan untuk mengetahui nilai ekonomi kawasan HRGMK sebagai penyimpan cadangan karbon. Hasil penelitian diharapkan menjadi acuan pelestarian HRGMK sebagai stabilisator iklim dunia. Nilai ekonomi karbon HRGMK ditaksir dengan menggunakan harga bayangan. Harga karbon yang digunakan untuk menaksir nilai ekonomi karbon diperoleh dengan metode benefit transfer. Hasil penelitian menunjukkan bahwa nilai total karbon HRGMK adalah US$ 1.591.878.378,00 atau Rp. 14.002.162.211.645,00. Nilai tersebut sebagian besar berasal dari cadangan karbon di bawah tanah.