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All Journal Indonesian Journal of Geography Sevanam: Jurnal Pengabdian Masyarakat
Rivi Neritarani
Fakultas Geografi UGM
Religion Humanities Earth & Planetary Sciences

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The Impact of Land Use Change on Groundwater Depth in The Groundwater Transition Zone of Merapi Volcano, Yogyakarta, Indonesia Sejati, Sadewa Purba; Neritarani, Rivi
Indonesian Journal of Geography Vol 56, No 1 (2024): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.88452

Abstract

Studies of the impact of land use change on groundwater on the southern slopes of Merapi Volcano tend to be carried out on a macro basis. Micro studies, especially in groundwater transition zones,  have not been previously conducted. In-depth studies need to be undertaken in the groundwater transition zone on the southern slope of Merapi Volcano to identify the impact of land use change on the dynamics of groundwater depth in 2012-2021. Data was collected through field surveys and remote sensing. Groundwater depth data were collected through field surveys in 2012 and 2021. Groundwater depth data were measured in dug wells. The location of the excavated well was determined by using the systematic random sampling method. Groundwater depth data were analyzed using the kriging spatial interpolation method. The results of groundwater depth interpolation in 2012 and 2021 were then compared to determine the changes. Rainfall data were also used in the study. Rainfall data were collected using remote sensing data through cloud computing. Literature studies related to the condition of monitoring wells were also used to determine groundwater dynamics based on rainfall conditions. Data on land use change for 2012-2021 were collected using remote sensing data. Land use change was analyzed using pansharpening, supervised classification, and overlay methods. Cross-tabulation analysis was performed to determine the impact of land use change on groundwater depth. The groundwater depths in the study area were classified into <6 m, 6-11 m, and >11 m. Changes in land use from irrigated rice fields to settlements and open land to scrub occurred predominantly in the study area. Changes in land use did not have a significant impact on changes in groundwater depth in the study area. Based on cross-tabulation analysis, it is known that 11.46% of the study area experienced groundwater deepening, 7.73% experienced groundwater siltation, and 80.81% experienced no change in groundwater depth in the period of 2012-2021. Groundwater deepening generally occurs in areas dominated by scrub and settlements far from river channels. Groundwater that grows shallower and does not change in depth occurs around irrigated rice fields close to river channels. Land use change that does not significantly impact groundwater depth is likely to occur because rainfall in the study area is high. The aquifer material in the study area also had an excellent ability to drain groundwater coming from the upper slopes of Merapi Volcano.
Implementasi Model Pembelajaran dengan Differentiated Instruction Berbasis E-Learning untuk Mahasiswa dengan Hambatan Mental Amri Amrullah, Yusuf; Theopilus Bayu Sasongko; Neritarani, Rivi; Agus Fatkhurohman
Sevanam: Jurnal Pengabdian Masyarakat Vol 1 No 2 (2022): September
Publisher : Universitas Hindu Negeri I Gusti Bagus Sugriwa Denpasar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25078/sevanam.v1i2.1393

Abstract

Masyarakat atau kelompok berkebutuhan khusus pada dasarnya memiliki hak yang dalam memperoleh pendidikan yang bermutu pada satuan pendidikan di semua jenis, jalur dan jenjang pendidikan. Hal ini juga berlaku pada satuan pendidikan tinggi. Institusi pendidikan tinggi wajib untuk mengakomodasi pendidikan bagi mahasiswa dengan hambatan khusus, salah satunya adalah hambatan mental. Salah satu yang menjadi kendala bagi mahasiswa dengan hambatan mental adalah kemampuan untuk memahami materi perkuliahan. Oleh karena itu, institusi pendidikan tinggi perlu mengembangkan model pembelajaran khusus untuk mahasiswa dengan hambatan tersebut. Tujuan dari penelitian ini adalah untuk mengkaji penerapan model pembelajaran khusus untuk mahasiswa dengan hambatan mental. Metode yang digunakan adalah dengan metode Differentiated Instruction, yaitu dengan memberikan pembedaan instruksi sehingga diharapkan dapat membantu mahasiswa tersebut dalam memahami materi perkuliahan. Berdasarkan hasil uji coba penerapan metode ini pada beberapa mahasiswa dengan hambatan mental, dapat diketahui bahwa pembedaan instruksi ini memerlukan media yang disesuaikan dengan profil belajar mahasiswa.
Study of the Impact of Rainfall Pattern Dynamics on Carbon Monoxide and Nitrogen Dioxide Using Cloud Computing (Case Study in the Special Region of Yogyakarta, Indonesia) Sejati, Sadewa Purba; Neritarani, Rivi
Indonesian Journal of Geography Vol 57, No 2 (2025): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.99395

Abstract

Carbon monoxide (CO) and nitrogen dioxide (NO2) are the primary pollutants found in the air. Based on the results of the study of predecessor researchers, it is known that human activity factors cause spatial and temporal changes in primary pollutants in the air, while natural factors, such as rainfall changes during the transition of seasons, have not been studied further. This study was conducted to examine the impact of rainfall changes on spatial patterns of primary pollutants (CO and NO2). The Special Region of Yogyakarta (DIY), Indonesia was chosen as a research area. The data used were remote sensing data, namely CHRIPS (Climate Hazards Group InfraRed Precipitation with Station data, NRTI (Near Real Time) / L3_CO data, and NRTI / L3_NO2 data. The data were analyzed using cloud computing methods based on Google Earth Engine and statistical analysis. The results showed that the dynamics of rainfall patterns had an impact on changes in CO and NO2 concentrations although it was not significant. Based on the study, it is known that an increase in rainfall of 1% causes a decrease in CO concentration of 1.935 x 10-5 mol/m2 and a decrease in NO2 concentration of 3.151 x 10-9 mol/m2.  A study conducted in southern India also concluded that higher rainfall has the potential to reduce CO and NO2 concentrations. The impact of rainfall pattern dynamics presented quantitatively in this study is a new finding, because there have not been many studies that explain the impact of rainfall pattern dynamics on CO and NO2 quantitatively.Received: 2024-08-24 Revised: 2025-01-02 Accepted: 2025-02-16 Published: 2025-05-26
Co-Authors Agus Fatkhurohman Amrullah, Yusuf Amri Sasongko, Theopilus Bayu Sejati, Sadewa Purba