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All Journal International Journal of Advances in Applied Sciences Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Journal of Degraded and Mining Lands Management Jurnal Wilayah dan Lingkungan Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir Jurnal Informatika Kaputama (JIK) TRANSFORMASI: Jurnal Manajemen Pemerintahan Jurnal Geosains dan Remote Sensing (JGRS) APPLIED RESEARCH ON CIVIL ENGINEERING AND ENVIRONMENT (ARCEE) Journal of Applied Geology Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Karimah Tauhid Eksplorium : Buletin Pusat Pengembangan Bahan Galian Nuklir
Hendy Setiawan
Department Of Geological Engineering, Faculty Of Engineering, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Energy Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Neuroscience Physics Social Sciences Transportation

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Characteristics of Nitrate Pollution in Shallow Groundwater on the South Slope of Mount Merapi, Yogyakarta, Indonesia Adi, Restu Dwi Cahyo; Wilopo, Wahyu; Setiawan, Hendy
EKSPLORIUM Vol. 44 No. 1 (2023): MAY 2023
Publisher : BRIN Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/eksplorium.2023.6876

Abstract

Groundwater is the primary clean water source for most Indonesian society. The increasing use of groundwater is inevitable due to the rapid development in Indonesia, particularly in Yogyakarta. Shallow aquifers are vulnerable to contamination due to anthropogenic influences. Therefore, this research aims to determine shallow groundwater's physicochemical and chemical characteristics on the southern slope of Mount Merapi, specifically focusing on nitrate and chloride concentrations in groundwater. This research collected monthly data from eighteen dug wells or springs and rainfall data in the study area during the rainy and dry seasons from August 2022 to January 2023. The analyzing sample used argentometry to determine chloride concentration and ultraviolet spectrophotometric to determine nitrate concentration in Yogyakarta Environmental Health and Disease Control Technical Center (BBTKLPP) laboratory. The physicochemical parameters were tested directly in the field using Hanna instruments. The results indicate that a significant portion of shallow groundwater has high nitrate concentrations, corresponding to the growing settlements in the research area. Furthermore, according to the comparison graph between nitrate and chloride, the nitrate source was indicated as anthropogenic. Fecal matter from sanitation practices using septic tanks will likely influence the nitrate increase.
Faktor Penyebab Gerakan Tanah di Desa Noelmina Kecamatan Takari, Kabupaten Kupang, Provinsi Nusa Tenggara Timur Lindung Freedom Boimau; Hendy Setiawan; Wahyu Wilopo
Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Vol. 15 No. 1 (2026): Cantilever
Publisher : Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35139/cantilever.v15i1.534

Abstract

A landslide is a process where the mass of rock or soil that forms a slope moves due to the force of gravity in a weak area. Landslides that occurred in Noelmina Village, Takari District, Kupang Regency on February 17, 2023, resulted in the main road, which connects the provincial capital of East Nusa Tenggara and several districts on Timor Island, being completely damaged. This research aims to identify the factors that contribute to landslides in Noelmina Village. This research began with collecting regional geological data, a regional geological structure, then continued with primary data collection in the field for geological mapping, geomorphological, and land use data, while rainfall data was taken from the CHIRPS satellite data. Results indicated that the landslide occurred within the Bobonaro carbonate mudstone unit, characterized by a rather steep slope where the geological structure consisted of joints in the rock mass. Additionally, the landslide was situated in an area influenced by the regional geological structure, specifically the left-hand horizontal fault. The land use conditions of the research area are quite varied, but the areas that experienced landslides were located in forest land uses that directly border residential areas and roads. The rainfall conditions during the landslide in February 2023 had a high intensity of 431mm - 463mm. An XRD analysis was conducted on rock or soil samples from the landslide area, and it was found that expansive minerals, namely montmorillonite, illite, and kaolinite, were present. The results of this research indicate that landslide events in the research area were significantly influenced by factors such as rock/soil conditions, geomorphology, geological structure, land use conditions, and the presence of expansive clay minerals. Furthermore, the dominant factor triggering the landslide was the high-intensity rainfall that took place in the study area of less than one month.
Landslide Susceptibility Mapping Using Weight of Evidence Method in Tieng Village and Surrounding Areas, Kejajar District, Wonosobo Regency, Central Java Province, Indonesia Fenora Aninditya Pramesthi; Wahyu Wilopo; Agus Hendratno; Hendy Setiawan; I Gde Budi indrawan; Doni Prakasa Eka putra; Wahyu Sasongko
Journal of Applied Geology Vol 10, No 2 (2025)
Publisher : Geological Engineering Department Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jag.117696

Abstract

Tieng village and its surrounding areas in Kejajar District, Wonosobo Regency, are identified as regions with a relatively high risk of landslide hazards. This research aims to examine the geological conditions influencing landslide occurrences and to develop a landslide susceptibility zonation map within the study area. Methods of landslide mapping using statistical method weight of evidence (WoE), with parameters including slope, lithology and grade of weathering, distance from lineaments, distance from rivers, and land use. All parameters were classified into several class and spatially processed using ArcGIS software. Then, these maps were overlaid and analyzed based on contrast weight values to produce the final landslide susceptibility zonation map. The resulting susceptibility map categorized into four zones: very low, low, medium, and high landslide susceptibility. The very low landslide susceptibility zone is generally found in the eastern part of the area, the low susceptibility zone is in the western and eastern parts, the medium susceptibility zone occurs in the eastern and southern parts, while the high susceptibility zone is distributed in the southeastern, central, and eastern parts of the study area. The parameters that have the most influence on landslide susceptibility in the research area based on their level of influence from strongest to weakest are land use, distance from lineament, distance from river, lithology and grade of weathering and slope. The accuracy of the landslide susceptibility map was assessed using the Success Rate Curve (SRC) and Prediction Rate Curve (PRC) validation. The Area Under Curve (AUC) values obtained from the SRC and PRC analyses were 0.765 for SRC and 0.741 for PRC, respectively, indicating a good level of model performance.
A Strengthening the Capacity of Village Community Institutions through Village-Owned Enterprises in Sumbermulyo Village Bantul, Yogyakarta: - Hendy Setiawan; Nur Wahyu Sulistyo
TRANSFORMASI: Jurnal Manajemen Pemerintahan Vol. 13 No. 2 (2021): TRANSFORMASI: Jurnal Manajemen Pemerintahan
Publisher : Institut Pemerintahan Dalam Negeri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33701/jtp.v13i2.1366

Abstract

The success of village-owned enterprises management cannot be separated from the quality of the performance and leadership of a village head. The more village-owned enterprises can develop rapidly, then there is the role and contribution of the Village Head as a catalyst for strengthening village community institutions. The purpose of this article is to provide an analysis related to how to strengthen village community institutions. Related to the focus of this research, namely the case of village-owned enterprises in Sumbermulyo Village, because the Village Head of Sumbermulyo has repeatedly been named the best Lurah in Yogyakarta, so whether this is in line with the development of village-owned enterprises in the village. The method used in this study uses a descriptive qualitative approach. Data collection techniques in this study used interview, observation, and documentation techniques. Processing research data using the stages of data presentation, verification, and drawing conclusions. The results of the study show that the management of the Sumbermulyo village-owned enterprises has not been able to run effectively and still encounters obstacles so that it is still far from being successful. This is related to strengthening the capacity of village governance which is still minimal so that further direction is needed. But on the other hand, independent innovations outside village-owned enterprises have also been found which are much more successful in their management, so that this can also be a means to form and revitalize village-owned enterprises so that their existence can be in line with village progress.
Co-Authors Adelia Saras Nugraheni Adi, Restu Dwi Cahyo Agung Setianto Agus Hendratno Agus Muji Santoso Agus Syahrani Alia Bihrajihant Raya Anang Wahid M.Diah Anggraeni Dyah S Arifin Dwi Saputro Bachtiar, Willy Dian Rusmanawati Doni Prakasa Eka Putra Dwikorita Karnawati Dwikorita Karnawati Ekasara, Adam Raka Evi Rinata Fenora Aninditya Pramesthi Finda Meyditia Herlina, Lien Heru Hendrayana I Gde Budi Indrawan Lindung Freedom Boimau Monaya, Nova Nanang Wahyudin Nur Wahyu Sulistyo Pardede, Akim Manaor Hara Restu Dwi Cahyo Adi rima siburian Ronny Lesmana Sihotang, Sudiman Wahyu Sasongko Wahyu Wilopo Wawan Budianta Yanuar Dwi Prastyo