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Studi Interaksi Air Tanah Dangkal dan Air Sungai di Sepanjang Daerah Aliran Kali Garang Semarang Menggunakan Isotop Stabil δ18O dan δ2H
DOI: http://dx.doi.org/10.55981/eksplorium.2017.3247
Abstract
ABSTRAK
Penelitian mengenai interaksi airtanah dangkal dengan air sungai Kali Garang di Semarang, Jawa Tengah, menggunakan parameter isotop 18O dan 2H telah dilakukan. Sebanyak 16 sampel air tanah dangkal dan 3 sampel air sungai diambil untuk analisis kandungan isotop stabil d18O dan d2H menggunakan alat Liquid Water Isotope Analyzer LGR DLT-100. Hasil analisis memperlihatkan adanya dua asal daerah masukan air: daerah pertama memiliki kandungan isotop d18O antara -9,41 ‰ hingga-8,5 ‰ dan d2H antara -58,2 ‰ hingga -51,6 ‰; daerah kedua memiliki kandungan isotop d18O dan d2H masing-masing -7,15 ‰ dan -41,55 ‰. Dengan demikian, hasil tersebut mengindikasikan bahwa sampel-sampel air pertama berasal dari elevasi yang relatif lebih tinggi jika dibandingkan dengan asal sampel air kedua, namun keduanya tidak mengalami interaksi dengan air sungai. Sedangkan sampel air tanah lainnya menunjukkan bahwa satu sampel (R4) memiliki interelasi berupa pencampuran dengan air sungai dan dua sampel lainnya (L1 dan R1) mengalami pencampuran dengan air asin atau air laut.
ABSTRACT
A study related to shallow groundwater interaction with Kali Garang River water in Semarang, Central Java using stable isotopes of 18O and 2H has been conducted. As much as 16 groundwater and 3 river water samples were taken for stable isotopes d18O and d2H analysis using Liquid water isotope analyzer LGR DLT-100. The results of analysis shows that there are two area of water recharge origin: the first area contains d18O isotope ranging between -9.41 ‰ to -8.5 ‰ and d2H between -58.2 ‰ to -51.6 ‰; the second area contains isotopes of d18O and d2H -7.15 and -41.55 ‰, respectively. Thus, these results indicate that the first water samples originate from a higher elevation than the origin of the second water sample, but both of them have no interrelation with river water. Whereas, other groundwater samples show that the sample (R4) has interrelation (i.e. mixing) with the river water and two other samples (L1 and R1) have interrelation with salty water or seawater.
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[1] G. Asocadewi, W. Oktiawan, and M. Hadiwidodo, “Penentuan Status mutu Air Dengan Menggunakan Metode Indeks Pencemaran (Studi Kasus: Sungai Garang, Semarang),” J. Tek. Lingkung. Undip, vol. 4, no. 2, pp. 1–7, 2015.
[2] R. Susanti, D. Mustikaningtyas, and F. A. Sasi, “Analisis Kadar Logam Berat pada Sungai di Jawa Tengah,” Sainteknol, vol. 12, no. 1, pp. 35–40, 2014.
[3] J. R. Putri, E. Sutrisno, and I. W. Wardana, “Pengaruh Pengelolaan Limbah Domestik Dengan Peningkatan Jumlah Septic Tank Terhadap Bebab Cemaran BOD Di Kali Semarang Menggunakan Program Qual2E,” J. Tek. Lingkung. Undip, vol. 3, no. 2, pp. 1–9, 2014.
[4] B. Marlena, S. B. Sasongko, and D. Sutrisnanto, “Kajian Pengelolaan Sub DAS Garang Hulu Terhadap Kualitas Air Sungai,” in Prosiding Seminar Nasional Pengelolaan Sumberdaya Alam dan Lingkungan, Undip Semarang, 2012, pp. 23–29.
[5] N. K. Dewi, Perdhana, and Yuniastuti, “Paparan Seng di Perairan Kaligarang Terhadap Ekspresi Zn-Thionein dan Konsentrasi Seng pada Hati Ikan Mas,” J. MIPA Unnes, vol. 35, no. 2, pp. 108–115, 2012.
[6] Y. Yi, J. J. Gibson, L. W. Cooper, J.-F. Helie, S. J. Birks, J. W. McClelland, R. M. Holmes, and B. J. Peterson, “Isotopic signals (18 O, 2 H, 3 H) of six major rivers draining the pan-Arctic watershed,” Global Biogeochem. Cycles, vol. 26, no. 1, Mar. 2012.
[7] Satrio, Hendarmawan, M. Sapari, and E. Ristin, “Karakteristik Air Tanah Dangkal Kota Semarang pada Musim Penghujan Berdasarkan Pendekatan Isotop Stabil (18O, 2H) dan Kimia Air,” J. Ilm. Apl. Isot. dan Radiasi, vol. 11, no. 1, pp. 73–86, 2015.
[8] Satrio and P. Sidauruk, “Studi Daerah Imbuh Sistem Air Sungai Bawah Tanah Gunungkidul-Yogyakarta Menggunakan Isotop Stabil 18O dan 2H,” J. Ilm. Apl. Isot. dan Radiasi, vol. 12, no. 1, 2015.
[9] S. T. Allen, J. R. Brooks, R. F. Keim, B. J. Bond, and J. J. McDonnell, “The role of pre-event canopy storage in throughfall and stemflow by using isotopic tracers,” Ecohydrology, vol. 7, no. 2, pp. 858–868, Apr. 2014.
[10] B. Sharma, R. Singh, P. Singh, D. P. Uniyal, and R. Dobhal, “Water Resource Management through Isotope Technology in Changing Climate,” Am. J. Water Resour., vol. 3, no. 3, pp. 86–91, 2015.
[11] S. M. Yidana, “The Stable Isotope Characteristics of Groundwater in the Voltaian Basin – An Evaluation of the Role of Meteoric Recharge in the Basin,” J. Hydrogeol. Hydrol. Eng., vol. 2, no. 2, pp. 1–10, 2013.
[12] S. B. Muhammad and U. Sadiq, “Analysis of Stable Isotopic Composition of Precipitation in Katsina State In Nigeria As An Indication of Water Cycle,” Adv. Phys. Theor. Appl., vol. 33, pp. 28–34, 2014.
[13] Cahyadi, A. Yananto, M. Sufwandika, and H. Nugraha, “Analisis Pengaruh Perubahan Penggunaan Lahan Terhadap Retensi Potensial Air Tanah pada Kejadian Hujan Sesaat (Studi Kasus Perubahan Penggunaan Lahan di DAS Garang Jawa Tengah),” in Seminar Nasional Informatika, UPN Veteran Yogyakarta, 2012, pp. E1–E7.
[14] O. Mustafa, B. Merkel, and S. M. Weise, “Assessment of Hydrogeochemistry and Environmental Isotopes in Karst Springs of Makook Anticline, Kurdistan Region, Iraq,” Hydrology, vol. 2, no. 2, pp. 48–68, 2015.
[15] M. Gaj, M. Beyer, P. Koeniger, H. Wanke, J. Hamutoko, and T. Himmelsbach, “In situ unsaturated zone water stable isotope measurements in semi-arid environments: a soil water balance,” Hydrol. Earth Syst. Sci., vol. 20, no. 2, pp. 715–731, Feb. 2016.
[16] M. Susana. and D. Harnandi, “Penelitian Hidrogeologi Daerah Imbuhan Air Tanah Dengan Metode Isotop dan Hidrokimia di Cekungan Air Tanah Semarang-Demak Propinsi Jawa Tengah,” Bandung, 2007.
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