Article Per Year (5 Year)
p-Index From 2021 - 2026
0.444
P-Index
This Author published in this journals
All Journal Journal of Degraded and Mining Lands Management Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research)
Tjahyo Nugroho Adji
Faculty of Geography, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Status of groundwater and river water quality around the location of illegal gold mining activities in Lantung District, Sumbawa Kevin Philips Barakati; Tjahyo Nugroho Adji; Noorhadi Rahardjo
Journal of Degraded and Mining Lands Management Vol 10, No 3 (2023)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2023.103.4433

Abstract

The Lantung area is one of the places on Sumbawa Island with a large gold deposit. One of the activities of the Lantung people that has the potential to damage the environment is separating gold from mercury. This study aimed to examine the activity of the gold laundering process, and the level of contamination of groundwater and river water due to gold processing from amalgamation by mercury (Hg+) waste. In this study, sampling was carried out for each location, namely two samples of wastewater, six samples of river water, and two samples of groundwater, which were then tested in the laboratory on the parameters of mercury and TSS. At the same time, pH was measured in the field. Furthermore, from the survey results, it was found that the use of mercury was ±150-250 mL at each gold processing location. The results showed that all samples from wastewater (tailings), groundwater and river water were contaminated with mercury with levels exceeding the acceptable quality standards. Furthermore, the status of water quality using the Pollution Index (IP) method shows that wastewater is light to moderately polluted, groundwater is lightly polluted, and river water is also lightly to moderately polluted.
Karakterisasi Hidrostratigrafi Berbasis Geolistrik untuk Identifikasi Akuifer di Lereng Timur Gunung Api Ungaran (Geoelectric-Based Hydrostratigraphic Characterization for Aquifer Identification on the Eastern Slope of Ungaran Volcano) Endra Yuliawan; Sonna Diwijaya; Hilmy Ahmad; Tjahyo Nugroho Adji; Ahmad Cahyadi
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 10 No 1 (2026): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Asosiasi Peneliti dan Teknisi Kehutanan dan Lingkungan Hidup Indonesia (APTKLHI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59465/jppdas.2026.10.1.107-130

Abstract

The eastern slope of Ungaran Volcano is an area under high pressure for clean water needs due to population growth and the expansion of residential and industrial areas. This study aims to identify and characterize the aquifer system through a hydrostratigraphic approach that integrates Vertical Electrical Sounding (VES) data from nine measurement points, borehole log data to a depth of 35 m, and geological and geomorphological information. The research results show the presence of two main aquifer systems, namely unconfined aquifers and confined aquifers. The unconfined aquifer is widely distributed in the central and eastern regions, particularly in the geomorphological unit of the Middle Slope Young Ungaran Pyroclastic Flow (VM6), which is dominated by porous lahar deposits. Meanwhile, the confined aquifer is identified in the northeastern zone, characterized by lahar layers trapped between impermeable rock formations of lava and fine tuff. The interpretation of rock resistivity shows that lahar deposits (10–100 Ωm) act as an aquifer, lava (>100 Ωm) as an aquifuge, and tuff (<10 Ωm) as an aquiclude. The 2D and 3D hydrostratigraphic models produced clearly illustrate the spatial distribution of aquifers, where the greatest groundwater potential is found in the eastern, central, and part of the northern regions. In contrast, the western and southern regions are dominated by lava rock, which has low aquifer potential. This finding provides an important scientific basis for the sustainable management and utilization of groundwater resources in volcanic areas.
Co-Authors Ahmad Cahyadi Endra Yuliawan Hilmy Ahmad Kevin Philips Barakati Noorhadi Rahardjo Sonna Diwijaya