Title: The implication of tectonic structures compartment in the hydrochemical distribution in the Merapi unconfined aquifer system

Authors: Herry Riswandi; Emi Sukiyah; Boy Yoseph C.S.S. Syah Alam; Mohamad Sapari Dwi Hadian

Addresses: Department of Geological Engineering, Faculty of Mineral Technology, Universitas Pembangunan Nasional 'Veteran' Yogyakarta, Jl SWK 104, Condongcatur, Yogyakarta, Indonesia ' Department of Geoscience, Faculty of Geological Engineering, Universitas Padjadjaran Bandung, Jl Raya Bandung Sumedang KM 21 Jatinangor, West Java, Indonesia ' Department of Applied Geology, Faculty of Geological Engineering, Universitas Padjadjaran Bandung, Jl Raya Bandung Sumedang KM 21 Jatinangor, West Java, Indonesia ' Department of Applied Geology, Faculty of Geological Engineering, Universitas Padjadjaran Bandung, Jl Raya Bandung Sumedang KM 21 Jatinangor, West Java, Indonesia

Abstract: This study focuses on the tectonic structures compartment. Furthermore, it controls the hydrochemical and piezometric groundwater distribution in the Merapi unconfined aquifer system. The investigation methods are proposing morphotectonic, statistical, and a hierarchical cluster of hydrochemical analysis. Thus, the methods are to characterise the multi-element of the structure's spatial pattern on the structural compartment. The aim is the cross-correlation of the hydrochemical population on the compartment. The morphotectonic studies showed structures lineament created by active tectonics, and it controls the groundwater flow system. The statistical analysis represents a relation between structure lineament controlling flow pattern and groundwater piezometric. It is related to the hydrochemical characteristics in the concentration of the ion analysis and the value of total dissolved solids. The analysis results are depicted on the digitised map for each compartment compared with the groundwater distribution flow and trends of piezometric. From there, the hydrogeochemical spatial distribution allowed us to characterise the unconfined aquifer system.

Keywords: hydrochemical; morphotectonic; hierarchical cluster; piezometric; groundwater; tectonic.

DOI: 10.1504/IJHST.2021.116665

International Journal of Hydrology Science and Technology, 2021 Vol.12 No.2, pp.116 - 141

Accepted: 01 May 2020
Published online: 01 Jul 2021 *

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