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All Journal Journal of Degraded and Mining Lands Management
Ahmad Cahyadi
Department of Environmental Geography, Faculty of Geography, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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Aquifer characteristics and groundwater potential for domestic requirements in Kediri Regency, Indonesia Setyawan Purnama; Ahmad Cahyadi; Andung Bayu Sekaranom; Erik Febriarta; Anugrah Jorgi Firmansyah; Indra Agus Riyanto
Journal of Degraded and Mining Lands Management Vol 10, No 2 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.102.4081

Abstract

Like other natural resources, groundwater is also being exploited at an increasing rate, especially for domestic requirements. Groundwater is preferred as a domestic water source because of its continuous availability and relatively good quality. Unfortunately, not all places have sufficient groundwater availability of good quality. The purpose of this study was to analyze the characteristics of the aquifer in the study area and evaluate its groundwater potential for domestic needs. Aquifer characteristics were determined based on geological and geomorphological conditions, while groundwater potential was calculated using a static approach. The results showed that the characteristics of the aquifers in Kediri Regency are various. In the eastern and central parts of the study area, the characteristics of the aquifer can be in the form of unconfined aquifers with high productivity. In the western part, most of them have non-aquifer material, so it is difficult to find groundwater. Groundwater generally fills joints and diaclase formed in andesitic lava with low discharge. Although the conditions of the aquifer are various, in general, the potential for groundwater in Kediri Regency can still support its requirements because the potential for groundwater in Kediri Regency is 71,121,313,394 m3, while domestic requirements is 52,348,490 m3/year.
Anthropogenic activity effect on water quality of epikarst spring in the western part of Gunungsewu Karst Area, Java Island, Indonesia Indra Agus Riyanto; Ahmad Cahyadi
Journal of Degraded and Mining Lands Management Vol. 11 No. 1 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.111.4899

Abstract

Epikarst springs are the main source of water used by the community in the western part of Gunungsewu Karst Area. One of the springs found in Gunungsewu karst area is Guntur Spring, with a catchment area that functions as agricultural land and settlements. Guntur Spring has connectivity between swallow holes and karst windows, so the spring can easily be polluted; therefore, a temporal study is needed regarding the water quality. The methods used were analysis of water quality standards, Schoeller diagrams, triangular Piper diagrams, and scatter plots. The results of the analysis of water quality standards showed that only Ca2+ and HCO3- ions and a small portion of Na+ exceeded WHO standards. The results of the Schoeller diagram analysis showed that the dominant ions were Ca2+ and HCO3-. The results of the Piper diagram analysis showed that the Guntur Spring is included in the classification of types I, J, and M, indicating the spring is not polluted. The results of the Piper diagrams showed that Guntur Spring is included in the dominant types of types C, A, G, D, and F, indicating the springs are not included in the polluted category. The scatter plot analysis of the Ca2+ + Mg2+ versus HCO3- + SO42- showed that the dominant ion in the Guntur Spring came from the dissolving of limestone. The scatter plot analysis of HCO3- versus Na+ indicated that the main process that forms Guntur Spring ions is not the dissolving process of silicates. The scatter plot analysis of Cl- - SO42- versus Na+ indicated that the main process that forms Guntur Spring ions is not the dissolving process of sodium/sodium sulfate and halite. There was one sample in the Cl- versus Na+ scatter plot analysis that showed an indication of an anthropogenic pollution. However, the overall analysis showed that anthropogenic activities in the study area do have a major impact on the water quality of the epikarst springs at the study site.
Co-Authors Andung Bayu Sekaranom Anugrah Jorgi Firmansyah Erik Febriarta Indra Agus Riyanto Indra Agus Riyanto Setyawan Purnama