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All Journal Integrated Lab Journal Jurnal Teknik Sipil Terapan
Prasetyo Rubiantoro
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Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Social Sciences Transportation

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PEMANFAATAN METODE GEOLISTRIK RESISTIVITAS KONFIGURASI SCHLUMBERGER DALAM PENDUGAAN LAPISAN AKUIFER UNTUK POTENSI AIRTANAH DI DESA CEMARA KECAMATAN SUBOH KABUPATEN SITUBONDO Prasetyo Rubiantoro
Integrated Lab Journal Vol. 4 No. 1 (2016)
Publisher : UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1399.192 KB) | DOI: 10.14421/ilj.2016.%x

Abstract

Prolonged drought impacts very significant for some areas of Indonesia causes the limited availability of surface water. Increasing need for clean water is not commensurate with the available surface water supply. Cemara village, Suboh District of Situbondo is one example of a water crisis in the dry season. Only rely on spring water from the mountains to meet the water needs of citizens. To improve the supply source of clean water, some alternative activities had been done, one of which is to identify subsurface aquifer layer with resistivity geoelectric method utilizing Schlumberger configuration. The research activities include measurements and observations in the field, data processing, and data interpretation. The results of processing and interpretation of the data concluded that the rock layers in the study site is in the form of soil or rock composed of volcanic tuff, breccia, sandstone, and sand as aquifer layers. At each point geoelectric identified aquifer layer that is able to store and distribute groundwater well at different depths. As a recommendation to carry out drilling , geoelectric point 2 has more potential aquifer layers . Aquifer layer was detected at a depth of 60 meters and 135 meters .
Analisis Karakteristik dan Distribusi Sedimen Dasar (Bed Load) di Sungai Lesti Menuju Waduk Sengguruh Wws, Anggara; Dian Sisinggih; Emma Yuliani; Prasetyo Rubiantoro
Jurnal Teknik Sipil Terapan Vol. 8 No. 1 (2026): E-ISSN 2714-7843
Publisher : Jurnal Teknik Sipil Terapan (JTST)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47600/jtst.v8i1.1267

Abstract

Sedimentation is a major problem in reservoir management because it reduces storage capacity and affects operational performance. One of the main sediment sources comes from Sungai Lesti, which flows into Waduk Sengguruh. This study aims to analyze the characteristics of bed load sediment based on grain size distribution and its implications for sedimentation processes in the reservoir. The research methods included field surveys, sediment sampling using a Helley-Smith Bedload Sampler, and laboratory using sieve analysis methods. The analyzed parameters were D10, D30, D60, uniformity coefficient (Cu), and gradation coefficient (Cc). The results indicate that the sediment is dominated by fine to very fine sand with poorly graded characteristics. The values of Cu and Cc show an increase in grain size variability and a more uneven distribution at locations closer to the reservoir. Differences in sediment characteristics between upstream and downstream areas reflect the occurrence of hydrodynamic sorting due to a decrease in flow velocity. Coarser particles tend to be deposited in the river–reservoir transition zone, while finer particles are transported farther and accumulate within the reservoir body. These conditions indicate more intensive sedimentation processes near the reservoir, which may accelerate siltation and reduce storage capacity in the long term. Therefore, integrated and sustainable sediment management is required to maintain the long-term functionality of the reservoir. Keywords: bed load, grain size distribution, sedimentation, lesti river, sengguruh dam
Co-Authors Anggara WWS Dian Sisinggih Emma Yuliani