Studi Pemisahan Aliran Dasar Metode Local Minimum Method Daerah Aliran Sungai Miu
Keywords:baseflow, Miu watershed, digital graphical method, local minimum method.
The two main elements of a river flow hydrograph are direct runoff and baseflow. Base flow is a flow that comes from groundwater and it is available during the rainy and dry seasons. Information of baseflow value of a watershed has an important meaning in efforts to develop and manage water resources, including the provision of clean water, irrigation systems, flood management and others. Miu watershed located in Sigi Regency often experiences natural disasters such as floods and droughts that occur almost every year, which is the research location with an area of 65,452.01 Ha. This study aims to determine the value of baseflow using the Local Minimum Method and to find out whether this method can be used for baseflow modeling in research watersheds. This study was conducted using Hydro Office software with input data in the form of daily discharge data from 2004 to 2013. The average baseflow value obtained was 5.43 m3/s. The process of calibrating the baseflow value by taking flow data in the dry season where there is no rainfall input. It is obtained that BFI have value an average of 0.89. This value indicates that the Miu watershed has high storage permeability characteristics, The Miu watershed has quite stable flow during dry periods, because the greater the BFI value, the better the water supply in a watershed. In the statistical test, the observed discharge is the discharge data from the measurement results for the period 2004-2013, while the calculated discharge is the result of the estimated base flow value obtained using the graphical method. From the results of the statistical test of RMSE and R2, the RMSE value was 0.147 and the R2 value was 0.751. Both statistical tests show that the local minimum method has a fairly good performance in modeling the base flow in the Miu watershed.
S. Harto, Hidrologi: Teori, Masalah, Penyelesaian, Yogyakarta: Nafiri Offset, 2009.
R.S. Brodie and S. Hostetler, A Review of Techniques for Analysis Baseflow from Stream Hydrograph, http://data.daff.gov.au/brs/brsShop/data/iah05_baseflow_final.pdf (diakses tanggal 20 September 2020).
K. Frochlich, W. Frochlich, and H. Wittenberg, “Determination of Groundwater Recharge by Baseflow Separation; Regional Analysis in Northest China”, IAHS Publication, vol. 221, p. 69, 1994.
C. Santhi, P.M Allen, R.S. Muttiah, J.G. Arnold, and P. Tuppad, “Regional Estimation of Baseflow for the Conterminous United States by Hydrologic Landscape Regions”, Journal of Hydrology, vol. 351, p. 139, 2008
Indarto, Hidrologi – Dasar Teori Dan Contoh Aplikasi Model Hidrologi, Jakarta: PT Bumi Aksara, 2010.
R.A. Sloto and M.Y. Crouse, HYSEP: A Computer Program for Streamflow Hydrograph Separation and Analysis, Pennsylvania: U.S. Geological Survey, 1996.
I. Indarto, A. Ratnaningsih, and S. Wahyuningsih, “Calibration of Six Recursive Digital Filters for Baseflow Separation in East Java”, ARPN Journal of Engineering and Applied Sciences, vol. 12, no.10, p. 3772, 2017.
Institute of Hydrology, Low Flow Studies: Research Report, United Kingdom: Crownarsh Gifford Wallingford, 1980.
L.M. Tallaksen and H.A.J. van Lanen, Hydrological Drought – Processes and Estimation Methods for Streamflow and Groundwater, Amsterdam: Elsevier, 2004.
H.M. Raghunath, Hydrology (Principles, Analysis Design) 2nd Edition, New Delhi: New Age International (P) Ltd., 2006.
V.U. Smakhtin, “Low Flow Hydrology: A Review”, Journal of Hydrology, vol. 240, no. 3-4, p. 147, 2001.
M. Gregor, Hydrooffice User Manual version 2015, http://hydrooffice.org, (diakses tanggal 20 September 2020).
D. Windatiningsih and D. Harlan, “Uji Validasi Data Debit untuk Deteksi Penyimpangan, Data Studi Kasus: DAS Citarum Hulu”, Jurnal Sumber Daya Air, vol. 15, no. 2, p. 121, 2019.
S. Wahyuningsih, I. Indarto, and Y.T. Galih, “Pengujian 9 Algoritma Untuk Pemisahan Aliran Dasar: Studi Di Wilayah UPT PSDA di Madiun”, Jurnal Teknik Sipil, vol. 25, no. 2, p. 129, 2018.
I. Indarto, E. Novita, and S. Wahyuningsih, “Preliminary Study on Baseflow Separation at Watersheds in East Java Regions”, Agriculture and Agricultural Science Procedia, vol. 9, p. 538, 2016.
I. Indarto and N.D. Herlinda, “Aplikasi Metode Pemisahan Aliran Dasar Berbasis Grafis Digital: Studi Pendahuluan di Wilayah DAS Brantas”, Jurnal Sumber Daya Air, vol. 16, no.1, p. 11, 2019.
How to Cite
Copyright (c) 2021 REKONSTRUKSI TADULAKO: Civil Engineering Journal on Research and Development
This work is licensed under a Creative Commons Attribution 4.0 International License.