Analisis MRC untuk Karakterisasi Akuifer Karst di Mataair Mudal, Kabupaten Kuloprogo

Afid Nurkholis; Tjahyo Nugroho Adji; Eko Haryono; Ahmad Cahyadi; Wisnu Agung Waskito; Hamzah Fathoni; Ikhwan Arbi Kurniawan; Romza Fauzan Agniy; Aji Dwi Pratama; Dicky Satria; Hendi Fatchurrohman; Igor Yoga Bahtiar

doi:10.22146/mgi.38297

Analisis MRC untuk Karakterisasi Akuifer Karst di Mataair Mudal, Kabupaten Kuloprogo

https://doi.org/10.22146/mgi.38297

Afid Nurkholis^(1*), Tjahyo Nugroho Adji⁽²⁾, Eko Haryono⁽³⁾, Ahmad Cahyadi⁽⁴⁾, Wisnu Agung Waskito⁽⁵⁾, Hamzah Fathoni⁽⁶⁾, Ikhwan Arbi Kurniawan⁽⁷⁾, Romza Fauzan Agniy⁽⁸⁾, Aji Dwi Pratama⁽⁹⁾, Dicky Satria⁽¹⁰⁾, Hendi Fatchurrohman⁽¹¹⁾, Igor Yoga Bahtiar⁽¹²⁾

(1) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada, Yogyakarta, Indonesia
(2) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(3) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(4) Fakultas Geografi, Universitas Gadjah Mada, Yogyakarta, Indonesia
(5) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(6) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(7) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(8) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(9) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(10) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(11) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(12) Karst Research Group, Fakultas Geografi, Universitas Gadjah Mada Yogyakarta, Indonesia
(*) Corresponding Author

Abstract

Akuifer karst memiliki triple porosity yang membuat karakterisasinya sulit dilakukan. Tujuan dari penelitian ini adalah menganalisis komponen hidrograf banjir dan membuat Master Recession Curve (MRC) pada akuifer karst yang mengimbuh Mataair Mudal. Data yang digunakan adalah debit aliran dan curah hujan yang tercatat setiap 30 menit pada November 2017 hingga Mei 2018 (6 bulan). Hasil penelitian menunjukkan bahwa Mataair Mudal memiliki complex discharge regime dengan derajat karstifikasi pada kelas 5,5. Analisis komponen hidrograf banjir menguatkan hasil perhitungan derajat karstifikasi. Waktu menuju puncak banjir (T_lag) yang tergolong cepat (2,5 jam) menunjukkan telah adanya aliran conduit. Perhitungan waktu menuju aliran dasar (T_b) baik secara manual (hidrograf banjir) maupun automatis (MRC) memiliki rerata sekitar 40 jam yang mencerminkan bahwa akuifer karst yang mengimbunya masih baik dalam menyimpan airtanah. Secara keseluruhan, akuifer karst di Mataair Mudal masih didominasi oleh retakan bertipe diffuse, meskipun sudah memiliki retakan bertipe conduit yang cukup berkembang

The objective of this research was to analyze the nature of the flood hydrograph components and create a Master Recession Curve (MRC) to estimate the degree of karstification in Mudal Spring. Discharge and rainfall data were recorded every 30 minutes at time intervals between November 2017 and May 2018. The results show that Mudal Spring has a complex discharge regime with a karstification degree in the class of 5.5. Meanwhile, the time to peak flood (T_lag) which is relatively fast (2.5 hours) shows the existence of conduit flow in the flood event. Calculation of time to baseflow (T_b) has an average of 40 hours which reflects that the karst aquifer was still good in storing groundwater. Overall, karst aquifers in Mudal Spring are still dominated by diffuse type voids, although they already have conduit type voids that are quite developed.

Keywords

akuifer karst; derajat karstifikasi; hidrograf banjir; master recession curve; Mataair Mudal

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References

Adji, T.N., Bahtiar, I.Y. (2016). Rainfall–discharge relationship and karst flow components analysis for karst aquifer characterization in Petoyan Spring, Java, Indonesia. Environmental Earth Sciences, 75, 735.

Adji, T.N., Haryono, E., Fatchurohman, H., dan Oktama, R. (2017a). Spatial and temporal hydrochemistry variations of karst water in Gunung Sewu, Java Indonesia. Environmental Earth Sciences, 76, 709.

Adji, T.N., Haryono, E., Mujib, A., Fatchurohman, H., dan Bahtiar, I. (2017b). Assessment of aquifer karstification degree in some karst sites on Java Island, Indonesia. Carbonates and Evaporites, 32, 1 – 14.

Adji, T.N., Haryono, E., Fatchurrohman, H., dan Oktama, R.(2016). Diffuse flow characteristics and their relation to hydrochemistry conditions in the Petoyan Spring, Gunungsewu Karst, Java, Indonesia. Geosciences Journal, 20, 381–390.

Arnold, J.G., Allen, P.M., Muttiah, R., dan Bernhardt, G.(1995). Automated base flow separation and recession analysis techniques. Groundwater, 33, 1010 – 1018.

Atkinson, T.C. (1985). Present and future directions in karst hydrogeology. Ann. Soc. Geoi. Belgique, 108, 293 – 296.

Barnes, B.S. (1939). The structure of discharge-recession curves. Eos Trans. AGU, 20, 721-725.

Berhail, S., Ouerdachi, L., dan Boutaghane, H. (2012). The use of the recession index as indicator for components of flow. Energy Procedia, 18, 741 – 750.

Bonacci, O.(1993). Karst springs hydrograph as indicators of karst aquifers. Hydrologies Sciences Journal-des Sciences Hydrologiques, 38, 2.

Fatchrurohman, H. (2017). Characterization and management of karst drainage system based on hydrograph analysis in Gunung Sewu Karst Area Master. Tesis di Fakultas Geografi, Universitas Gadjah Mada, Indonesia.

Fatchrurohman, H.,Adji, T.N., Haryono, E., dan Wijayanti, P. (2018). Baseflow index assessment and master recession curve analysis for karst water management in Kakap Spring, Gunung Sewu. IOP Conf. Series: Earth and Environmental Science, 148.

Ford, D., Williams, P. (1989). Karst Hydrology and Geomorphology. West Sussex: John Wiley & Sons Ltd.

Gregor, M.,dan Malik, P.(2010). RC 4.0 User’s Manual Hydro Office Sofware for Water Science. link: https://hydrooffice.org/Downloads?Items=Manual

Haryono, E., Danardono., Mulatsih, S., Putro, S.T.,dan Adji, T.N.(2016) The Nature of Carbon Flux in Gunungsewu Karst, Java-Indonesia. Acta Carsologica, 45, 173–185.

Jeannin, P.Y.,& Sauter, M.(1998). Analysis of karst hydrodynamic behaviour using global approaches: a review Bulletin d’Hydrogéologie. Neuchatel, 16, 31–48.

Kullman, E. (2000). Nove metodicke pristupy k rieseniu ochrany a ochrannych pasiem zdrojov podzemnych vod v horni- novych prostrediach a krasovopuklinovou a puklinovou priepustnostou. Podzemna voda, 6, 31 – 41.

Kurniawan, I.A., Adji, T.N., Nurkholis, A., Haryono, E., Fatoni, H., Waskito, W.A., Cahyadi, A., Agniy, R.F. (2019) Karst aquifer response by time series analysis applications in Jonggrangan Karst, Java Island, Indonesia. Environmental Earth Science, 78, 379.

DOI: https://doi.org/10.1007/s12665-019-8386-x

Langbein, W.B. (1938). Some channel storage studies and their application to the determination of infiltration. Eos Trans. AGU, 19, 435 – 447.

Maillet, E. (1905) Essais d’Hydr aulique Souterraine et Fluvi ale.Hermann Paris, 218.

Malik, P. (2007) Assessment of regional karstification degree and groundwater sensitivity to pollution using hydrograph analysis in the Velka Fatra Mts., Slovakia. Environ. Geol., 51, 707 – 711.

Malik, P., Vojtkova, S. (2012). Use of recession-curve analysis for estimation of karstification degree and its application in assessing overflow/underflow conditions in closely spaced karstic springs. Environmental Earth Sciences, 65, 2245 – 2257.

Mujib, M.A., (2015). Analisis karakteristik dan tingkat karstifikasi akuifer karst di sistem Mataair Ngerong, Kecamatan Rengel, Kabupaten Tuban Master.Tesis di Fakultas Geografi, Universitas Gadjah Mada, Indonesia.

Nathan, R.J., McMahon, T.A. (1990). Evaluation of automated techniques for baseflow and recession analyses. Water Resour. Res, 7, 1465-1473.

Nurkholis, A., Adji, T.N., Haryono, E., Cahyadi, A.,dan Agniy, R.F. (2017). Spatial and temporal variation of flow characteristics to aquifer characterizations of Pindul Karst System, Gunungkidul Regency. Proceeding of 2nd annual conference of groundwater expert association (PIT-PAAI), 13–15 September 2017, Yogyakarta. (doi: http://doi.org/10.17605/OSF.IO/87D2K )

Nurkholis, A., Cahyadi, A., dan Agniy, R.F. (2018) Spatial and temporal flood characterization of Pindul Karst System, Gunungkidul Regency. IOP Conf. Series: Earth and Environmental Science, 145.

Nurkholis, A., Adji, T.N., Haryono, E., Cahyadi, A., Suprayogi. (2019). Time series analysis application for karst aquifer characterization in Pindul Cave Karst System, Indonesia. Acta Carcologica, 48/1, 69-84. DOI: https://doi.org/10.3986/ac.v48i1.6745

Posavec, K., Bacani, A.,dam Nakic, Z.(2006). A visual basic spreadsheet macro for recession curve analysis.Ground Water, 44, 764 – 767.

Schulz, E.F., (1976). Problems in Applied Hydrology. Water Resources Publication, Colorado

Snyder, F.F.(1939). A concept of runoff-phenomena. Eos Trans. AGU, 20, 25 – 738.

Sari, A.M. (2017). Evaluasi pelaksanaan corporate social responsibility PT. PLN (Persero) area Yogyakarta di Ekowisata Taman Sungai Mudal. Skripsi di Fakultas Ilmu Politik dan Sosial, Universitas Muhammadiyah Yogyakarta, Indonesia.

Tallaksen, L.M. (1995). A review of baseflow analysis. Journal of Hydrology, 165, 349-370.

DOI: https://doi.org/10.22146/mgi.38297