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All Journal Geo Media: Majalah Ilmiah dan Informasi Kegeografian LaGeografiA Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Journal of Degraded and Mining Lands Management AKADEMIKA Jurnal Penelitian Pendidikan IPA (JPPIPA) Jambura Geoscience Review J SIG (Jurnal Sains Informasi Geografi) Journal of Humanity and Social Justice Jurnal Abadimas Gorontalo Journal La Lifesci JURNAL GEOGRAFIKA (GEOGRAFI LINGKUNGAN LAHAN BASAH) Jurnal Abdimas Dosma Jurnal Abdimas Dosma
Jaya, Risman
Department Of Geography, Faculty Of Science And Computer Science, Universitas Muhammadiyah Gorontalo, Indonesia
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PELATIHAN DAN PEMANFAATAN LAHAN DENGAN KONSEP AGROFORESTRY Risman Jaya; Sri Rahayu Ayuba; Nursetia Wati
Jurnal Abdimas Gorontalo (JAG) Vol 6 No 1 (2023): Jurnal Abdimas Gorontalo (JAG), Mei 2023
Publisher : UPPM Politeknik Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30869/jag.v6i1.1197

Abstract

Dulamayo selatan merupakan desa yang terdapat di Kecamatan Telaga Kabupaten Gorontalo. Secara ekologis desa Dulamayo Selatan merupakan kawasan penyangga (buffer zone) yaitu kawasan hulu dari DAS Bone. Dengan menjadi kawasan hulu maka pelu dilakukannya penjagaan terhadap kondisi alamnya secara maksimal. Banyaknya aktivitas masyarakat yang melakukan kegiatan alih fungsi lahan menjadikan permasalahan utama dalam kawasan tersebut. Sehingga perlunya dilakukan pemahaman dan pembinaan dalam mengelola kawasan penyangga. Dalam pengabdian yang dilakukan metode yang digunakan adalah metode vegetatif. Terdapat tiga metode konservasi yaitu metode mekanik, metode vegetatif dan metode kimia. Namun dalam pelatihan yang dilakukan di desa Dulamayo Selatan dengan menggunakan metode vegetatif, menggunakan metode vegetatif dianggap lebih cepat dipahami dan di anggap lebih mudah dalam implementasinya. Metode pelatihan yaitu dengan menggunakan konsep Agroforestri sebagai pengelolaan lahan. Tahapan yang digunakan yaitu pelaksanaan pengabdian yaitu tahap seminar dan penyuluhan, tahap pelatihan yang meliputi pembuatan kontur sebagai arah penanaman, dan penanaman pohon sebagai penahan laju limpasan air dan penahan sedimentasi. Sedimentasi yang terkumpul secara bertahap dapat dimanfaatkan sebagai media tanam dan secara alami sedimentasi akan membentuk lahan teras tering.
Analysis of Infiltration in Various Land Use in The Alo River Sub-Region Wiranto Djauhari; Arthur Gani Koto; Risman Jaya; Sri Rahayu Ayuba; Ahmad Syamsu Rijal; Tisen Tisen
Jurnal Geografika (Geografi Lingkungan Lahan Basah) Vol 4, No 1 (2023): GEOGRAFIKA
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jgp.v4i1.8060

Abstract

In the Alo sub-watershed, the study compares the rates of various types of land use. The Alo sub-watershed is 7,959.98 areas in total. Measurement of infiltration rates for various land uses in the Alo sub-watershed and analysis of differences in infiltration rates for various land uses in the Alo sub-watershed are the problems at hand in this study. The Horton method was used in this study's infiltration measurements. This approach uses a model of time-dependent empirical equations. It is known that multiple infiltration categories exist for plantations, villages, vacant land, bushes, and woods in the infiltration rate class for the kind and usage of dry land used in this study's Alo sub-watershed. It has classes for Fast, Moderate, and Moderate infiltration rates. For the type of land use and paddy field, the infiltration rate falls into the category of being fairly slow. This is due to the high water content of paddy fields, which makes the infiltration process take a while to complete. As a result, the infiltration rate in the Alo sub-watershed, Tibawa District, Gorontalo Regency, and Gorontalo Province reveals that the medium class dominates in the Alo sub-watershed. The cumulative infiltration rate or total amount of infiltrated water is 123,899 mm/hour at point 14 types of vacant land, and 8,476 mm/hour at point 16, which is the smallest cumulative value. The infiltration rate class in the Alo sub-watershed, Tibawa District, Gorontalo Regency, and Gorontalo Province reveals that the Medium Class dominates the sub-watershed.
Relation of morphometric characteristics to land degradation in the Biyonga sub-watershed, Gorontalo Regency, Indonesia Jaya, Risman; Murti, Sigit Heru; Adji, Tjahyo Nugroho; Sulaiman, Muhammad
Journal of Degraded and Mining Lands Management Vol. 11 No. 2 (2024)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2024.112.5263

Abstract

One of the crucial watersheds causing significant sedimentation in Lake Limboto is the Biyonga sub-watershed. This study aimed to examine and evaluate the morphometric characteristics of the watershed that contribute to possible erosion and land degradation hazards in the Biyonga sub-watershed. ALOS PALSAR (11.25 m), TERRASAR-X (5-10 m), and DEMNAS satellite images with a resolution of 8 m were employed, combining spatial analysis with a remote sensing approach and a Geographic Information System. Basic data of morphometric parameters were generated through basin morphometric analysis using Digital Elevation Model (DEM) image extraction. Then, the linear aspect, area, and relief parameters were defined by mathematical morphometric equations. The calculation results were interpreted into field data to confirm the relationship between watershed morphometric characteristics related to erosion and land degradation events. The results of the morphometric analysis showed that the flow density is a medium-textured criterion with a long elongation shape and an elongated flow pattern. Based on the relief aspect, the Biyonga Sub-watershed is in the form of moderate relief, has various characteristics with an average ratio, and has terrain that can trigger erosion and land degradation. This study has provided information that degraded land is not fully influenced by morphometric factors but due to poor land use and management systems, which accelerate erosion and sedimentation.
Analisis Sebaran Tingkat Kerentanan Erosi di Kawasan DAS Alo, Gorontalo Arman, Anggriani; Rijal, Ahmad Syamsu; Dangkua, Talha; Jaya, Risman; Koto, Arthur Gani
Geomedia Majalah Ilmiah dan Informasi Kegeografian Vol. 22 No. 2 (2024): Geo Media: Majalah Ilmiah dan Informasi Kegeografian
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/gm.v22i2.59553

Abstract

Alo Watershed Gorontalo Regency is one of the biggest contributors to watershed sedimentation in Limboto Lake, so it is necessary to conduct research on the distribution of erosion vulnerability levels in Alo Watershed. This study aims to determine the Analysis of the Distribution of Erosion Vulnerability Levels in the Alo Watershed Area, using the USLE (Universal Soil Loss Equation) method by finding the value of A, namely the amount of erosion that is influenced by rainfall (R), soil type (K), slope (LS). ), land use (C), and conservation measures (P) the calculation is the value of A = R x K x LS x C x P. The research results show that the total amount of erosion in the Alo Watershed area is 458,898.35  Ton/Ha/Year. Land use in the Alo watershed area is dominated by moorland or fields, therefore, to reduce the rate of erosion, land conservation measures are needed, for example changing land management habits by making bench terraces. Bench terraces can reduce the length of the slope and hold water so that it can reduce the speed of water flow on the surface.
The Soil and Water Assessment Tool (SWAT) Model in the Context of Erosion Monitoring in the Batulayar Sub-Watershed Area Mujiono, Ikha Setiawaty; Ayuba, Sri Rahayu; Jaya, Risman
Jurnal Geografika (Geografi Lingkungan Lahan Basah) Vol 5, No 2 (2024): GEOGRAFIKA
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jgp.v5i2.13800

Abstract

This study was conducted in the Batulayar Sub-Watershed, Distrik Bongomeme, with the aim of assessing the level of erosion and evaluating the SWAT model as a tool for erosion monitoring. A mixed-method approach was employed, with data analyzed using the ArcSWAT software. The results indicated that the Batulayar Sub-Watershed experienced erosion categorized as "very mild" and "mild," ranging from 0-15 tons/ha/year to 15-60 tons/ha/year, according to the classification by the Ministry of Forestry. Very mild erosion occurred in 15 sub-basins, primarily in areas with flat to moderately steep slopes, while mild erosion was observed in 29 sub-basins with steeper slopes. The main factors contributing to erosion were slope gradient, soil type, and land use, particularly agricultural activities on steep slopes. Calibration and validation results showed an NSE value of 0.9, indicating a high level of accuracy in replicating observed discharge. The SWAT model proved effective in mapping the distribution of erosion levels and provided critical insights for sustainable soil and water conservation management.
Diyonumo Island Tourism Potential Using Geographic Information System Application in Gorontalo Utara Regency Ratna Amir; Ahmad Syamsu Rijal; Risman Jaya
Jurnal Geografi : Media Informasi Pengembangan dan Profesi Kegeografian Vol 20, No 1 (2023)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jg.v20i1.37097

Abstract

One of the new tourist objects in North Gorontalo Regency is Diyonumo Island and until now it has not been optimally developed both in terms of its feasibility as a tourist area. So it really needs intervention from both the government and the private sector to encourage tourism development in North Gorontalo Regency which is based on nature. But there is no information system that provides an overview of this tourism potential. So the researchers identified the tourism potential of Diyonumo Island using a geographic information system in North Gorontalo Regency. The method used in this study was SWOT integrated with a spatial approach to analyze each parameter, namely attractions, infrastructure and accessibility. Based on spatial mapping, Diyonumo Island tourism can be recommended as a strategic tourism area for Gorontalo Province. The results of the analysis show that Diyonumo Island has a percentage of 40% of tourist attractions that have the potential to be developed and become a supporting strategy to increase the number of tourist visits.
Analisis Keterlanjuran Ruang Lingkungan Universitas Muhammdiyah Gorontalo Jaya, Risman; Rijal, Ahmad Syamsu
LaGeografia Vol 19, No 2 (2021): Februari
Publisher : UNIVERSITAS NEGERI MAKASSAR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (885.904 KB) | DOI: 10.35580/lageografia.v19i2.16317

Abstract

Reviewing spatial planning is a must in planning and regional development, besides that, it is also to obtain information related to the suitability of the use of space that has been used. Spatial planning assessment can be based on a tendency towards spatial use and based on land use and spatial function. Techniques and kali have been carried out using spatial analysis with the concept of geographic information systems that cannot be separated from the research parameters used. The method used is a mixed method that combines quantitative and qualitative methods. The quantitative method functions to produce numerical data so that it can be interpreted into a narrative, while qualitative methods are used to describe either numerical data, tables, pictures, or maps into useful narrative information based on the results of the research that has been done. The purpose of this study is to see the progress in the implementation of space suitability in the campus environment of the Muhammadiyah University of Gorontalo. The result of the research shows that the campus area can be classified based on the length of space, which includes the appropriate area in the built area of 1,81537 ha, the undeveloped area of 7,23050 ha and the unsuitable area is in the built area of 0.04513 ha. In addition to producing information related to space suitability, the research results also provide recommendations regarding the plan to use campus space as an alternative for future development.
PENERAPAN POLA TANAM GARIS KONTUR PADA LAHAN PERTANIAN BERBUKIT DALAM RANGKA MENINGKATKAN KESUBURAN TANAH DAN MENGENDALIKAN BESARAN EROSI Ayuba, sri rahayu; Risman Jaya; Ivan Taslim; Intan Noviantari Manyoe
JURNAL ABDIMAS DOSMA (JAD) Vol. 1 No. 1 (2022): Januari
Publisher : IKATAN ALUMNI DOSEN MAGANG KEMENRISTEKDIKTI TAHUN ANGKATAN 2017

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70522/jad.v1i1.7

Abstract

Desa Ipilo didominasi oleh topografi perbukitan yang sebagian besar dijadikan lahan bertani jagung oleh masyarakat sehingga kejadian erosi yang berimbas pada penurunan kesuburan tanah menjadi ancaman yang serius terhadap keberlangsungan aktivitas pertanian. Kegiatan ini bertujuan untuk memberikan pemahaman pada masyarakat akan kondisi lahan serta memperkenalkan cara tanam yang lebih berkelanjutan yakni pola tanam mengikuti garis kontur. Melalui metode sosialisasi dan praktek olah tanah langsung pada lahan, kegiatan ini dapat mengembalikan kesuburan tanah dan memperkecil besaran erosi yang terjadi. Berdasarkan hasil pengabdian dapat disimpulkan bahwa masyarakat mampu membuat titik-titik tanam sesuai garis kontur dengan konsep agroforestry serta mampu menerapkannya. Melalui kelompok tani yang dilatih langsung, diharapkan seluruh lahan bertani didaerah perbukitan Desa Ipilo mampu menekan kebutuhan pupuk kimia sehingga produktifitas dapat terus meningkatkan keuntungan Para petani.  
Karakteristik Morfometri dan Hubungannya dengan Kejadian Banjir di DAS Paguyaman, Gorontalo Karina Meiyanti Maulana; Ahmad Syamsu Rijal S; Talha Dangkua; Risman Jaya; Andrew Mulabbi
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.11909

Abstract

The Paguyaman Watershed represents a strategically significant and essential water resource for the surrounding region. In recent years, this area has become increasingly vulnerable to environmental pressures, including heightened sedimentation, changes in land use, declining water quality, and more frequent flooding events. This study aims to evaluate the morphometric characteristics of the Paguyaman Watershed and their relationship to flood vulnerability observed over the past five years. Morphometric analysis was conducted using quantitative methods within GIS and remote sensing approach. The primary dataset utilized was DEMNAS. The analyzed morphometric parameters include drainage density (3.95), stream frequency (8.61), bifurcation ratio (8.41), form factor (0.13), elongation ratio (0.40), and ruggedness number (8.20). These parameter values indicate that the Paguyaman Watershed possesses an elongated concave shape, steep topography, high surface runoff intensity, and low infiltration capacity. The findings reveal that the watershed exhibits characteristics of high flood susceptibility, as evidenced by recurrent flood events in the villages of Totopo, Tolite, and Juria over the last five years. The spatial pattern of flood vulnerability within the watershed is closely linked to morphological features, such as steep slopes, low soil infiltration capacity, and excessive surface flow accumulation—particularly within the Bilato and Boliyohuto sub-districts.
Analisis Morfometri Komparatif untuk Penilaian Risiko Banjir di Sub DAS Alo dan Molamahu, Kabupaten Gorontalo Indrawan; Talha Dangkua; Ahmad Syamsurijal S; Risman Jaya
Jurnal Penelitian Pendidikan IPA Vol 11 No 8 (2025): August
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i8.11924

Abstract

This study conducts a comparative morphometric analysis of the Alo and Molamahu sub-watersheds, located in the upstream Limboto Watershed, Gorontalo Province, Indonesia, to assess flood risk. Using the National Digital Elevation Model (DEMNAS) with an 8-m spatial resolution, classical morphometric parameters were derived through remote sensing and Geographic Information System (GIS) techniques. Both sub-watersheds share a maximum stream order of 4 and exhibit relatively high drainage density and stream frequency, indicating rapid surface runoff. However, the Molamahu sub-watershed is larger, steeper, and has a higher ruggedness number than Alo, suggesting greater erosion potential and higher susceptibility to landslides and flash floods. In contrast, Alo shows gentler slopes but remains flood-prone due to short overland flow paths. The analysis demonstrates that morphometric characteristics directly influence flood dynamics, highlighting the need for tailored watershed management. Recommended strategies include erosion control and slope stabilization in Molamahu, and water retention measures in Alo, supported by broader reforestation efforts across the Limboto system.
Co-Authors Abdulah, Sri Wulan Ahmad Syamsu Rijal Ahmad Syamsu Rijal S Ahmad Syamsurijal S Andrew Mulabbi Arman, Anggriani Ayuba, Sri Rahayu Hendra Hendra Ilham Junaid Indrawan Intan Noviantari Manyoe Ivan Taslim Karina Meiyanti Maulana Koto, Arthur Gani Matalapu, Irawan Maulana, Karina Meiyanti Mohamad, Irwansyah Reza Muhammad Sulaiman Mujiono, Ikha Setiawaty Munajat Nursaputra, Munajat Nursetiawati Nursetiawati Ratna Amir Sartika Moha Sigit Heru Murti Sri Rahayu Ayuba Sri Rahayu Ayuba Sri Rahayu Ayuba Sri Rahayu Ayuba Talha Dangkua Talha Dangkua Tisen Tisen Tisen Tisen Tjahyo Nugroho Adji Wilan Mooduto Wiranto Djauhari