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THE POTENTIAL OF RAINFALL AND ITS IMPACT TO GROUNDWATER STORAGE IN JAVA ISLAND Setyawan Purnama
Indonesian Journal of Geography Vol 40, No 2 (2008): 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.2255

Abstract

The objectives of the study are to map the distribution of rainfall in Java, toanalyze its potential and the impact to groundwater storage. To achieve thosegoals, rainfall distribution is mapped using isohyet method. From the averagedistribution of monthly rainfall, the annual potential of rainwater on everywatershed was calculated. Afterwards, the groundwater storage was analyzed andcounted by applying the water balance concept. The results of the study show thatthe mean of the highest annual rainfall is 4082 mm which occurs on Cisadane-Ciliwung watershed and the lowest one is 1421 mm on Citarum Hilir watershed.From the rainfall potential, Cisadeg-Cikuningan watershed has the highest rainfallpotential at the amount of 25342 million m31month and Grindulu Panggulwatershed has the lowest potential at the amount of 3678 million m3lmonth.Meteorologically, Cisadeg-Cikuningan watershed has the highest groundwaterstorage at the amount of 6088 million m31yearand the lowest amount of it occurson Madura watershed at 78 million m3lyear.
IDENTIFIKASI AIRTANAH ASIN BERDASARKAN PENDUGAAN GEOLISTRIK DI PESISIR KOTA CILACAP JAWA TENGAH Setyawan Purnama; Ahmad Cahyadi; Erik Febriarta; Nurul Khakhim; Hari Prihatno
Geo Media: Majalah Ilmiah dan Informasi Kegeografian Vol 11, No 2 (2013): Geo Media: Majalah Ilmiah dan Informasi Kegeografian
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1405.64 KB) | DOI: 10.21831/gm.v11i2.3450

Abstract

Airtanah merupakan salah satu sumberdaya air potensial yang dapat digunakanuntuk memenuhi kebutuhan air manusia. Pemanfaatan airtanah yang berlebihan diwilayah pesisir seringkali menyebabkan terjadinya intrusi air laut. Penelitian ini bertujuanuntuk mengetahui keterdapatan airtanah asin di Pesisir Kota Cilacap. Analisis dilakukandengan pendugaan geolistrik. Analisis data dilakukan dengan menggunakan softwareIP2Win. Hasil analisis menunjukkan bahwa airtanah asin terdeteksi pada titik A, C, D danG.Kata Kunci: Airtanah Asin, Pesisir, Geolistrik, Kota Cilacap
Quality and Type of Chemical of Groundwater at Coastal Areas of Semarang Setyawan Purnama
Forum Geografi Vol 18, No 2 (2004)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v18i2.613

Abstract

There are two objectives of this researh. First, to identify and analyze the condition of ground water quality in the research area, and second to determined the chemial types of groundwater. To ahieve these objectives 59 groundwater samples were taken stratifiedly, base on the different of electrical conductance value. As a result, it is identified that most groundwater in the research area is not suitable for drinking water sources, because has high concentration of electrical conductance, turbidity, hardness, chloride, manganese, and salinity. Thiis conclusion is also supported by stiff diagram analysis. The result of Stuyfzand analysis shhows that the chemical types of groundwater is very variative. Groundwater in coastal areas has higher suply of saline water than fresh water.
POTENSI SUMBERDAYA AIR DAS SERAYU Setyawan Purnama
Jurnal Rekayasa Lingkungan Vol. 6 No. 3: Jurnal Rekayasa Lingkungan
Publisher : BPPT

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29122/jrl.v6i3.1942

Abstract

Serayu River Basin is one of critical river basin in Java. This problems become seriously because the river basin cover wide area, that almost cover most of the south of Central Java Province. This research is aimed to calculate and analyse the resources potency of rainfall, river, groundwater and springs. Rainfall potency is calculated by isohyetal method, river potency is determined base onhydograph dan water level data. Groundwater and springs is determined qualitatifly base on Hydrogeological Map, whereas quantitatifly is calculated by meteorogical method base on water balance concept in river basin. As a result, show that the average rainfall in Serayu River Basin is 3,577 m3/year, whereasthe rainfall potency is 13,481.00 x 106 m3/year. The average of monthly maximum discharge in Serayu is 60 m3/second, with monthly minimum discharge 11 m3/second. Meteorologically, groundwater storage in Serayu River Basin is 105,981,890 m3/year. Beside that, in Serayu River Basin also have 93 springs, that is 10 springs with discharge more than 500 litre/second, 15 springs with discharge 50-100 litre/second, 20 springs with discharge 10-50 litre/second and 24 springs with discharge less than 10 litre/second.Keywords : Water resources potency, Serayu River Basin