M. Widyastuti
Fakultas Geografi Universitas Gadjah Mada

Published : 7 Documents
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EVALUATION OF WATER QUALITY USING POLLUTION INDEX IN CIMANUK WATERSHED, INDONESIA Nurrohman, Andy Wibawa; Widyastuti, M.; Suprayogi, Slamet
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.p08

Abstract

Land use is one of the macro parameters that affects water quality in a watershed. The Cimanuk watershed which is dominated by agricultural land use and settlements has encountered a decline in water quality. There are eight parameters including pH, TDS, TSS, Nitrate, Phosphate, Sulphate, BOD, and COD analyzed to evaluate water quality utilizing the Pollution Index (IP) method. This research has provided a clear understanding of the status of water quality in the Cimanuk watershed based on six monitoring points carried out at the start of the 2018 rainy season. Overall, the IP values obtained ranged from 2.05 to 5.96 with the lightly polluted category at points A, B, C, D, and E, while for point F it was in the moderately polluted category. The key parameters that have the most influence on water quality pollution are Nitrate, Phosphate, Sulphate from fertilization activities in agricultural land, while runoff from settlements contribute to increasing parameters of  BOD and COD. These results can be beneficial for sustainable management of water and land resources in the Cimanuk watershed.
KONSERVASI MATA AIR BERBASIS MASYARAKAT DI UNIT FISIOGRAFI PEGUNUNGAN BATURAGUNG, LEDOK WONOSARI DAN PERBUKITAN KARST GUNUNG SEWU, KABUPATEN GUNUNGKIDUL Sudarmadji, Sudarmadji; Suprayogi, Slamet; Widyastuti, M.; Harini, Rika
Jurnal Teknosains Vol. 1 No. 1 tahun 2011
Publisher : Sekolah Pascasarjana UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.921 KB)

Abstract

Spring is as one of the water resources potential that can not be ignored. Gunungkidul district has three physiographic units: Baturagung Hills, Wonosari Basin and Gunung Sewu Karst Hills. All of them affect the distribution of springs in the Gunungkidul Regency. On the other hand, physiography will affect the community adaptation to the environment. It will contribute to the springs conservation effort. The purposes of this research are:  1) to identify the characteristics of springs, 2) to analyze the community participation in conserving  the springs as basic information to develop spring conservation models. To identify the socio-economic characteristics and the springs characteristics in the research areas use a survey method. Unit sampling and analysis is done purposively based on three zones: Baturagung Hills, Wonosari Basin and Gunung Sewu Karst Hills. Socio-economic survey was done by sampling on the 90 respondents, divided into 3 zones through direct interviews using quetionare. Quantitative descriptive analysis was performed through statistical tests. The results show that the quality of spring water in all physiographic zones meet to the water quality standard, except those for colli bacteria. The discharge of karst springs in the hills of Gunung Sewu greater than the discharge of the two other zones. The springs distribution is more in Wonosari Basin and Karst Hills of Gunung Sewu than Baturagung Hills. The level of the community participation in springs conservation is mostly done in groups through user spring groups. Generally, socio-economic factors affect to the level of participation in prevention of springs damage.
KERENTANAN AIRTANAH TERHADAP PENCEMARAN DAERAH IMBUHAN PONOR DI KARST GUNUNG SEWU (STUDI DI DAERAH ALIRAN SUNGAI BAWAH TANAH BRIBIN) Widyastuti, M.; Sudarmadji, Sudarmadji; Sutikno, Sutikno; Hendrayana, Heru
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 19, No 2 (2012)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1.84 KB)

Abstract

Airtanah karst merupakan salah satu sumbedaya alam yang potensial di kawasan karst Gunung Sewu. Di sisi lain, akuifer karst sangat rentan terhadap pencemaran. Sungai Bawah Tanah Bribin menjadi sumber air utama untuk masyarakat khususnya untuk mendukung kebutuhan air di musim kemarau. Tujuan pene1itian ini adalah: 1) mengetahui karakteristik daerah imbuhan ponor me1alui identifikasi variabel kerentanan (kondisi ponor, lereng, vegetasi, tanah dan batuan); dan 2) mengetahui tingkat kerentanan airtanah terhadap pencemaran dengan metode COP. Ponor, gua, dan dolin diidentifikasi melalui sensus, sedangkan pengambilan sampel tanah secara purposive berdasarkan unit seri tanah. Proses pengolahan data mendasarkan metode COP, yang merupakan akronim C (concentration offlowkonsentrasi aliran), 0 (overlaying layerllapisan pelindung) and P (precipitation/curah hujan). Setiap variabel dan sub variabel mempunyai nilai di setiap ke1as dan dihitung melalui operasi perkalian dan penjumlahan. Hasil menunjukkan bahwa karakteristik daerah imbuhan ponor bervariasi menurut aspekjumlah, ukuran, lokasi dan kondisi ponor; lereng dan vegetasi, jenis tanah dan batuan serta ketebalannya. Tingkat kerentanan airtanah terhadap pencemaran sebagain besar sangat rentan. Faktor yang mempunyai pengaruh besar adalah konsentrasi aliran. Jumlah ponor sebagai imbuhan terkonsentrasi (titik) dari aliran permukaan menyebabkan sangat rentan.
WATER QUALITY MODELING FOR POLLUTANT CARRYING CAPACITY ASSESSMENT USING QUAL2KW IN BEDOG RIVER Setiawan, Akhmad Darajati; Widyastuti, M.; Hadi, M. Pramono
Indonesian Journal of Geography Vol 50, No 1 (2018): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.558 KB) | DOI: 10.22146/ijg.16429

Abstract

Considering the abundance of potential pollutant sources along Bedog River, i.e. highly dense residential areas, agricultural lands, and industrial areas, this study aimed to quantitatively assess the Pollutant Load (PL) and Pollutant Carrying Capacity (PCC) of the river based on Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD)parameters. The assessment employed a water quality modeling using Qual2Kw that provided not only the comprehensive values of PL and PCC but also the amount of PL that should be reduced to meet the PCC of every river segment. Water sampling and primary parameter measurement were conducted purposively in seven observation points, which included one point source and six non-point sources (river segments). River segments were determined according to the characteristics of land use and drainage system. Descriptive, graphic, and spatial analyses on water quality modeling show that the COD and BOD of Bedog River (2.24 km) indicates a small presence of PL compared to the river?s PCC. The PCC allows additional pollutant loads of 566.95 kg/day or 0.024 ton/hour BOD and 22,965.12 kg/day or 0.96 ton/hour COD. However, a high BOD in segments 3, 5, and 6 and a high COD in segment 5 imply the needs for PL reduction.
PENGARUH PERILAKU PENDUDUK DALAM MEMBUANG LIMBAH TERHADAP KUALITAS AIR SUNGAI GAJAHWONG Risyanto, Risyanto; Widyastuti, M.
Jurnal Manusia dan Lingkungan (Journal of People and Environment) Vol 11, No 2 (2004)
Publisher : Pusat Studi Lingkungan Hidup Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1.84 KB)

Abstract

Sungai Gajahwong merupakan salah satu sungai yang menjadi sasaran Prokasih (Program Kali Bersih) dan diperuntukkan sebagai sumber air baku Golongan B. Penelitian ini bertujuan untuk (1) mengetahui kualitas air sungai baik fisik maupun kimia, (2) mengidentifikasi sumber pencemar potensial mencemari air sungai, (3) mengetahui perilaku penduduk dalam membuang limbah ke sungai, serta (4) mengetahui keterkaitan antara perilaku penduduk dengan kualitas air sungai. Metode yang digunakan di dalam penelitian ini adalah metode survei. Untuk parameter fisik (kualitas air) dilakukan pengambilan sampel air secara purposive sampling dan uji laboratorium. Aspek sosial ekonomi dilakukan melalui pendekatan Rapid Rural Appraisal (RRA) dan wawancara mendalam (ln-depth lnterview). Hasil penelitian menunjukkan adanya kaitan antara perilaku penduduk dan kualitas air Sungai Gajahwong. Sumber pencemar potensial di Sungai Gajahwong, di bagian hulu: rumatr tangga, pertanian dan jasa; bagian tengah: pertanian dan permukiman; dan di bagian hilir adalah permukiman, jasa dan industri.
KONSERVASI MATA AIR BERBASIS MASYARAKAT DI UNIT FISIOGRAFI PEGUNUNGAN BATURAGUNG, LEDOK WONOSARI DAN PERBUKITAN KARST GUNUNG SEWU, KABUPATEN GUNUNGKIDUL Sudarmadji, Sudarmadji; Suprayogi, Slamet; Widyastuti, M.; Harini, Rika
Jurnal Teknosains Vol 1, No 1 (2011): December
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (393.921 KB) | DOI: 10.22146/teknosains.3990

Abstract

Spring is as one of the water resources potential that can not be ignored. Gunungkidul district has three physiographic units: Baturagung Hills, Wonosari Basin and Gunung Sewu Karst Hills. All of them affect the distribution of springs in the Gunungkidul Regency. On the other hand, physiography will affect the community adaptation to the environment. It will contribute to the springs conservation effort. The purposes of this research are:  1) to identify the characteristics of springs, 2) to analyze the community participation in conserving  the springs as basic information to develop spring conservation models. To identify the socio-economic characteristics and the springs characteristics in the research areas use a survey method. Unit sampling and analysis is done purposively based on three zones: Baturagung Hills, Wonosari Basin and Gunung Sewu Karst Hills. Socio-economic survey was done by sampling on the 90 respondents, divided into 3 zones through direct interviews using quetionare. Quantitative descriptive analysis was performed through statistical tests. The results show that the quality of spring water in all physiographic zones meet to the water quality standard, except those for colli bacteria. The discharge of karst springs in the hills of Gunung Sewu greater than the discharge of the two other zones. The springs distribution is more in Wonosari Basin and Karst Hills of Gunung Sewu than Baturagung Hills. The level of the community participation in springs conservation is mostly done in groups through user spring groups. Generally, socio-economic factors affect to the level of participation in prevention of springs damage.
WATER QUALITY CHARACTERISTICS OF JONGE TELAGA (DOLINE POND) AS WATER RESOURCES FOR THE PEOPLE OF SEMANU DISTRICT GUNUNGKIDUL REGENCY Widyastuti, M.; Haryono, Eko
Indonesian Journal of Geography Vol 48, No 2 (2016): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1676.469 KB) | DOI: 10.22146/ijg.17595

Abstract

Abstract Doline ponds (telaga) have an important role as one of water resources in karst areas, especially during dry seasons in Gunungkidul. Recently, the doline ponds are facing various environmental problems, i.e. steadily decreasing water storage, water loss, and degrading water quality. The research aims to determine the characteristics of Jonge Telaga which include the continuity of flow, utilization, pollution sources, physical water quality (temperature, EC,TDS, TSS, and turbidity), chemical water quality (pH , NO2, NO3, NH4, PO4, BOD , COD, and detergent), and biological water quality (total coliform). In order to determine the characteristics of Jonge Telaga, the research was conducted using a survey method, i.e., observing the continuity of flow and measuring physical, chemical, and biological water quality. Initially, the water was sampled purposively based on the area and the depth of this doline pond. The qualitative description of the results shows that Jonge Telaga is a closed perennial doline pond, whose main pollution source comes from domestic activities, such as bathing and washing. According to the Governor Regulation of the Special Region of Yogyakarta Number 20 Year 2008 on Water Quality Standards, Jonge Telaga meets all of the water quality criteria, except the temperature and detergent, for a Class II water.Abstrak Telaga mempunyai peran penting sebagai salah satu sumberdaya air di daerah karst, khususnya pada musim kemarau di Kabupaten Gunungkidul. Pada saat ini telaga menghadapi berbagai permasalahan lingkungan yaitu simpanan air yang terus berkurang, air yang cepat hilang, dan penurunan kualitas air. Tujuan penelitian adalah untuk mengetahui karakteristik telaga yang meliputi kontiyuitas aliran, pemanfaatan, sumber pencemar, kualitas fisik air telaga (TDS, TSS, suhu, kekeruhan, DHL), kimia air (pH, NH4, PO4, NO2, NO3, BOD, COD, deterjen) dan biologi air (coliform total).  Penelitian ini dilaksanakan berdasarkan metode survei. Untuk mengetahui karakteristik telaga dilakukan pengamatan kontinyuitas aliran, pengukuran kualitas air secara fisik, kimia dan biologi. Pengambilan sampel air dilakukan secara purposive mendasarkan pada luasan dan kedalaman telaga. Analisis hasil dilakukan secara deskriptif kualitatif. Hasil penelitian menunjukkan bahwa Telaga Jonge merupakan telaga yang tertutup dengan ketersediaan air menerus sepanjang tahun. Sumber pencemar utama telaga adalah kegiatan domestik (mandi dan cuci). Kualitas air Telaga Jonge menurut baku mutu air kelas II PERGUB DIY Nomor 20 Tahun 2008 masih di bawah ambang batas kecuali suhu dan deterjen.