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Anggoro, Hengky
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Social Sciences

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Drain Hole Installation Design in an Open Coal Mine Cahyadi, Tedy Agung; Fadlil, Doni Firdaus; Titisariwati, Indun; Hartono, Hartono; Nursanto, Edy; Ansori, Muhammad Iqbal; Anggoro, Hengky
Journal TECHNO Vol. 7 No. 2 (2021): November
Publisher : Universitas Pembangunan Nasional Veteran Yogayakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/journal techno.v7i2.5441

Abstract

The presence of groundwater on the mine slopes can disturb the stability of the slope. High groundwater can increase pore pressure which affects the amount of load on the mine slope. In order to lower the groundwater level, it is necessary to have drainage holes to drain water naturally. This study aims to design a horizontal drain installation so that it can lower the groundwater table. The results of this study indicate the existence of an aquifer in the form of sandstones. In this aquifer horizontal drains will be installed. The results of this study are in the form of horizontal drains installation design, namely, the location of the installation of the horizontal drain, the diameter of the boreholes, the distance between the boreholes, the length of the horizontal drains installation pipe, and the angle of inclination of the installation of the horizontal drains.
PERAN CITRA SATELIT LANSAT 8 OLI/TIRS UNTUK ANALISIS DAERAH RESAPAN AIR DI KABUPATEN MAGELANG, JAWA TENGAH Anggoro, Hengky; Winarti, Winarti
KURVATEK Vol 10 No 2 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

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Abstract

This study aims to analyze the distribution of groundwater recharge potential areas in Magelang Regency using a Geographic Information System (GIS) approach and Landsat 8 OLI satellite imagery. The analysis was conducted by integrating four key parameters: land cover, soil type, slope gradient, and rainfall, utilizing a scoring and overlay method. Supporting data such as the National Digital Elevation Model (DEMNAS) were used for topographic analysis. Rainfall data were obtained from CHIRPS, while soil type maps were sourced from FAO/UNESCO to support spatial modeling. The results revealed that approximately 27% of the Magelang Regency area has high groundwater recharge potential, 59% falls into the moderate (natural) category, and 14% is classified as critical to highly critical. Areas with high recharge potential are generally characterized by dense vegetation cover, highly porous soils, and relatively gentle to moderate slopes. In contrast, areas with low recharge potential are commonly found in built-up regions and steep slopes that are prone to surface runoff. These findings are expected to provide valuable insights for groundwater conservation planning and sustainable land use management. The implementation of integrated conservation strategies is crucial to enhance soil infiltration capacity and maintain the hydrological cycle balance in Magelang Regency
Co-Authors Ansori, Muhammad Iqbal Cahyadi, Tedy Agung Edy Nursanto Fadlil, Doni Firdaus Hartono Hartono Indun Titisariwati, Indun Winarti Winarti