Sudarmadji .
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PHYSICAL WATER QUALITY RESPONSE TO RAINFALL OF BETON KARST SPRING AT GUNUNGKIDUL REGENCY - YOGYAKARTA INDONESIA Widyastuti, M.; ., Sudarmadji; ., Sutikno; Hendrayana, Heru
Indonesian Journal of Geography Vol 44, No 1 (2012): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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Abstract

Beton karst spring is located in the Ponjong sub District Gunungkidul Regency, at thewestern part of Bribin undergorund river catchment area. The purpose of this study are: 1) toknow the variations of rainfall and discharge in the research area, 2) to know thecharacteristics of the physical water quality of Beton spring and 3) to determine therelationship between the variations of the rainfall toward the discharge and the physicalwater quality of Beton spring. This study uses survey methods and the techniques of datacollection using sample by purposive sampling. The variables are rainfall (the depth andintensity), spring discharge and physical water quality of spring (EC, T, TDS, turbidity). Thedata analysis is conducted graphically and descriptively to explain the relationship betweenthe variations of rainfall to the discharge and physical water quality of spring. The resultsshow the rainfall has variations include the pattern, events and the amount of rainfall. Betonspring has high discharge variations. The physical water quality of the spring meets to thewater quality standards according to the Government Regulation number 82 years 2001. Thestrong correlation between rainfall variations to the discharge and the physical water qualityof Beton spring can be seen clearly. It is reflected from the high value of R2.
Some Notes on Groundwater As A Domestic Water Supply of The Yogyakarta Municipality ., Sudarmadji
Indonesian Journal of Geography Vol 26, No 28 (1994): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

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Abstract

Water supply in Yogyakarta municipality is mainly originated from two main sources, the pipe water and groundwater. The pipe water which is operated by the local drinking water authority does not suffice for the water demand of the people in the city. Tire second source is groundwater, which is used by most people in the city by traditional system. The aquifer of the Yogyakarta which consists of volcanic materials erupted by Merapi volcano is fairly good, however the expansion of the city area toward the northern and north eastern area may reduce groundwater recharge. The rapid growth of population and other city facilities such as hotels may cause groundwater supply to decline. Groundwater quality in certain area may subject to pollution by domestic wastes, assigned by the high content of chemical substances such as iron and sulphate, besides high content of coliform bacteria, and nitrite. Heavy metals were undetected in the groundwater of the area
Penelitian Pendahuluan Mutu Air Hujan Di Kotamadya Yogyakarta = Rain Water Quality in Yogyakarta Municipality A Preliminary Study ., Sudarmadji
Majalah Geografi Indonesia Vol 1, No 1 (1988)
Publisher : Majalah Geografi Indonesia

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Abstract

A preliminar study on rainwater quality was conducted in the municipal area of Yogyakarta (Central Java) to reveal its chemical characteristics and spatial variation within the municipality. Seven rainwater samples were collected within the municipality and one sample to the north of Yogyakarta. The samples have been analyzed on major chemical elements and the general physical characteristics. The analysis shows that rainwater in the municipal area contains relatively high concentrations of some specific chemical elements. In the central part of the city HCO3 , Ca, Mg, and SiO2 and the electrical conductivity appear to be substantially higher than in the suburban areas. The relatively high concentrations are thought to be the result of urban activities, in particular combustion waste from motorised traffic and dust production which dissolves in rainwater. INTISARI Penelitian pendahuluan tentang mutu air hujan ini dilakukan di daerah Kotamadya Yogyakarta, untuk mengetahui mutu air hujan dan agihannya menurut ruang di kola tersebut. Sampel air hujan dikumpulkan selama bulan Januari 1986 sampai bulan Maret 1986 dan delapan lokasi, tujuh lokasi terletak di dalam Kotamadya Yogyakarta dan scbuah lagi terletak di sebelah utara Kotamadya Yogyakarta. Sampel air yang dikumpulkan telah dianalisis untuk mengetahui konsentrasi beberapa unsur/zat kimia dan beberapa sifat fisik air tersebut. Dari hasil analisis telah diketahui bahwa air hujan di daerah tersebut telah mengandung beberapa unsur kimia dalam konsentrasi yang relatif tinggi. Di daerah pusat kola, HCO3 , Ca, Mg dan SiO2 dan sifat fisik berupa daya hantar listrik menunjukkan angka yang lebih tinggi dibandingkan dengan yang ada di daerah-daerah yang terletak di pinggiran kota. Konsentrasi zat kimia yang tinggi diperkirakan sebagai akibat pengaruh aktivitas kota, terutama lalu lintas kendaraan yang menghasilkan sisa pembakaran dan debu yang Iarut dalarn air hujan tersebut.
Penelitian Pendahuluan Mutu Air Hujan Di Kotamadya Yogyakarta = Rain Water Quality in Yogyakarta Municipality A Preliminary Study ., Sudarmadji
Majalah Geografi Indonesia Vol 1, No 1 (1988)
Publisher : Fakultas Geografi, Universitas Gadjah Mada

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Abstract

A preliminar study on rainwater quality was conducted in the municipal area of Yogyakarta (Central Java) to reveal its chemical characteristics and spatial variation within the municipality. Seven rainwater samples were collected within the municipality and one sample to the north of Yogyakarta. The samples have been analyzed on major chemical elements and the general physical characteristics. The analysis shows that rainwater in the municipal area contains relatively high concentrations of some specific chemical elements. In the central part of the city HCO3 , Ca, Mg, and SiO2 and the electrical conductivity appear to be substantially higher than in the suburban areas. The relatively high concentrations are thought to be the result of urban activities, in particular combustion waste from motorised traffic and dust production which dissolves in rainwater. INTISARI Penelitian pendahuluan tentang mutu air hujan ini dilakukan di daerah Kotamadya Yogyakarta, untuk mengetahui mutu air hujan dan agihannya menurut ruang di kola tersebut. Sampel air hujan dikumpulkan selama bulan Januari 1986 sampai bulan Maret 1986 dan delapan lokasi, tujuh lokasi terletak di dalam Kotamadya Yogyakarta dan scbuah lagi terletak di sebelah utara Kotamadya Yogyakarta. Sampel air yang dikumpulkan telah dianalisis untuk mengetahui konsentrasi beberapa unsur/zat kimia dan beberapa sifat fisik air tersebut. Dari hasil analisis telah diketahui bahwa air hujan di daerah tersebut telah mengandung beberapa unsur kimia dalam konsentrasi yang relatif tinggi. Di daerah pusat kola, HCO3 , Ca, Mg dan SiO2 dan sifat fisik berupa daya hantar listrik menunjukkan angka yang lebih tinggi dibandingkan dengan yang ada di daerah-daerah yang terletak di pinggiran kota. Konsentrasi zat kimia yang tinggi diperkirakan sebagai akibat pengaruh aktivitas kota, terutama lalu lintas kendaraan yang menghasilkan sisa pembakaran dan debu yang Iarut dalarn air hujan tersebut.