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All Journal Indonesian Journal of Geography Jurnal Ilmu Lingkungan Agrikultura Teknotan: Jurnal Industri Teknologi Pertanian Jurnal AGROTEKNOLOGI JURNAL TEKNOLOGI LINGKUNGAN Jurnal Keteknikan Pertanian Cropsaver : Journal of Plant Protection Indonesian Journal of Forestry Research SITEKIN: Jurnal Sains, Teknologi dan Industri Journal of Degraded and Mining Lands Management Jurnal Keteknikan Pertanian Tropis dan Biosistem Arena Hukum Prosiding Semnastek Register: Jurnal Ilmiah Teknologi Sistem Informasi Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) JURNAL SUMBER DAYA AIR ZIRAA'AH MAJALAH ILMIAH PERTANIAN Proceedings Series on Physical & Formal Sciences Jurnal Ilmu Kehutanan Jurnal Indonesia Sosial Sains PROSIDING SEMINAR NASIONAL PENELITIAN DAN PENGABDIAN KEPADA MASYARAKAT (SNPPM) UNIVERSITAS MUHAMMADIYAH METRO Jurnal Manusia dan Lingkungan Indonesian Journal of Forestry Research
Chay Asdak
Jurusan Teknik Pertanian, Fakultas Teknologi Industri Pertanian, Universitas Padjadjaran
Religion Agriculture, Biological Sciences & Forestry Humanities Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Neuroscience Physics Public Health Social Sciences Other

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Karakteristik Daerah Aliran Sungai (DAS) Air Bengkulu dan Perubahan Penggunaan Lahannya dalam Kaitannya dengan Kejadian Banjir Saraswati, Gredia Sekar; Asdak, Chay; Joy, Benny
Jurnal Ilmu Lingkungan Vol 23, No 4 (2025): July 2025
Publisher : School of Postgraduate Studies, Diponegoro Univer

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jil.23.4.915-922

Abstract

Daerah Aliran Sungai (DAS) merupakan suatu areal tempat berlangsungnya proses-proses biofisik hidrologis; yang menerima, mengumpulkan air hujan, sedimen dan unsur hara serta mengalirkannya pada sungai utama ke laut atau danau.  Salah satu DAS dengan kepadatan penduduknya paling tinggi di Provinsi Bengkulu adalah DAS Air Bengkulu.  Penelitian ini dilakukan untuk melakukan pengkajian terhadap karakteristik DAS Air Bengkulu, perubahan penggunaan lahan tahun 2013-2022 dan hubungannya dengan frekuensi kejadian banjir. Analisis sistem informasi geografis (SIG), analisis data curah hujan harian, dan Statistical Package for the Social Sciences (SPSS) digunakan dalam penelitian ini.  Hasil penelitian menunjukkan bahwa DAS Air Bengkulu memiliki luas ± 50.035 ha, keliling DAS-nya 110,63 km, Panjang sungai utama 57,91 km, lebar DAS-nya 20,13 km, Panjang DAS-nya 37,93 km, ketinggian tempat 0-1.000 mdpl, dan jumlah sungai keseluruhan 14 buah. Bentuk DAS ini termasuk paralel, dengan pola aliran sungainya denditrik dan nilai kerapatan sungai 1,06. DAS Air Bengkulu ini termasuk kategori yang harus dipulihkan karena memiliki lahan kritis yang luas. Dalam kurun waktu 10 tahun (2012-2021) telah terjadi perubahan penggunaan lahan di DAS Air Bengkulu. Penggunaan lahan berupa hutan berkurang seluas 2.684 ha (5,4%), perkebunan sawit bertambah 1.966 ha (3,9%), pemukiman bertambah 2.800 ha (5,6%), lahan pertanian campur bertambah 1.973 ha (3,9%), dan areal pertambangan bertambah 1.637 ha (3,2%).  Fluktuasi kejadian banjir yang terjadi di DAS Air Bengkulu dipengaruhi oleh intensitas curah hujan dan penggunaan lahannya. Korelasi luasan lahan pertanian, pemukiman, sawah; perkebunan dan pertambangan bernilai positif artinya meningkatnya jumlah penggunaan ini akan meningkatkan nilai debitnya.  Korelasi luasan hutan dan semak belukar bernilai negatif artinya meningkatnya luas penggunaan lahan ini akan menurunkan debit sungainya. Kelas penggunaan lahan dan curah hujan memiliki hubungan yang kuat terhadap debit total, dengan nilai diterminasi 95%.
Spatial dynamics model of land use and land cover changes: A comparison of CA, ANN, and ANN-CA Dede, Moh.; Asdak, Chay; Setiawan, Iwan
Register: Jurnal Ilmiah Teknologi Sistem Informasi Vol 8 No 1 (2022): January
Publisher : Information Systems - Universitas Pesantren Tinggi Darul Ulum

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26594/register.v8i1.2339

Abstract

Land use and land cover (LULC) changes through built-up area expansion always increases linearly with land demand as a consequence of population growth and urbanization. Cirebon City is a center for Ciayumajakuning Region that continues to grow and exceeds its administrative boundaries. This phenomenon has led to peri-urban regions which show urban and rural interactions. This study aims to analyze (1) the dynamics of LULC changes using cellular automata (CA), artificial neural network (ANN), and ANN-CA; (2) the influential factors (drivers); and (3) change probability in the period 2030 and 2045 for Cirebon’s peri-urban. We used logistic regression as quantitative approach to analyze the interaction of drivers and LULC changes. The LULC data derived from Landsat series satellite imagery in 1999-2009 and 2009-2019, validation of dynamic spatial model refers to 100 LULC samples. This research shows that LULC changes are dominated by built-up area expansion which causes plantations and agricultural land to decrease. The drivers have a simultaneous effect on LULC changes with r-square of 0.43, where land slope, distance from existing built-up area, distance from CBD, and accessibility are significant triggers. LULC simulation of CA algorithm is the best model than ANN and ANN-CA based on overall accuracy and overall accuracy (0.96, 0.75, 0.73 and 0.95, 0.66, 0.66 respectively), it reveals urban sprawl through the ribbon and compact development. The average probability of built-up area expansion is 0.18 (2030) and 0.19 (2045). If there is no intervention in spatial planning, this phenomenon will decrease productive agricultural lands in Cirebon's peri-urban.
Identification of Invasive Aliens Plant Species in Cultivated Area of Kamojang Crater at Ibun District, Bandung Regency, West Java Rasiska, Siska; Asdak, Chay; Parikesit, Parikesit; Sudarjat, Sudarjat; Gunawan, Budhi; Setiawan, Iwan; Setiawan, Ditriz
CROPSAVER Vol 6, No 1 (2023)
Publisher : Departemen Hama dan Penyakit Tumbuhan Fakultas Pertanian Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/cropsaver.v6i1.45383

Abstract

The Cultivated Area in Kamojang Crater, Ibun District, Bandung Regency is part of a single landscape mountain, adjacent to conservated and protected areas which has high biodiversity. This study aims to identify invasive alien plants species in cultivated areas, adjacent to conservation and protected areas. The method used is a descriptive qualitative study with the sampling line transect in 500 meter radius of four location, namely near Nature Reserves (NR), near Nature Tourism Parks (NTP), agriculture (A) and near Protected Forests (PF), and this study has done up at July until November, 2022. The results showed that in the cultivated area in Kamojang Crater, Ibun District, Bandung Regency found 41 families and 96 species of understorey, with the highest number being from the Asteraceae, Poaceae and Fabaceae. Diversity of understorey was categorized as high (H'=3.428), evenly distributed (E=0.738), high species richness (R=13.503) and no dominant species (C=0.165). Several understorey, namely 8 orders, 10 families, and 29 species were categorized as invasive aliens plant species, with the highest important values index being Ageratina riparia (99,642%), Imperata cylindrica (72,919%), Paspalum notatum (31,155%), Chromolaena odonata (31,074%), Etlingera elatior (27,905%), Ageratum conyzoides (20,179%), Lantana camara (19,029%), Amaranthus hybridus (18,818%), Pennisetum purpureum (15,120%), Mimosa pudica (15,031%), Crassocephalum crepidioides (14,037%), and Axonopus compresus (10,671%).
Determination of Sustainable Factory Locations for the Lemon Agroindustry using AHP, Mapping and Water Management Asdak, Chay; Octoyne, Aisyah; Kendarto, Dwi Rustan; Prawiranegara, Boy Macklin Pareira
Jurnal Keteknikan Pertanian Vol. 12 No. 2 (2024): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.012.2.272-283

Abstract

This research was conducted in Suntenjaya Village, Lembang, West Bandung Regency, focusing on lemon agro-industry development through the Analytical Hierarchy Process (AHP) method approach, area mapping, and water management to determine a sustainable factory location. The main objective is the selection of factory site by integrating lemon production considering sustainable agriculture aspects, product aspects, and water conservation programs. The results of the study provide a strong foundation for sustainable agro-industrial development will support sustainable agriculture, local economy, and environmental protection. The research also combined qualitative and quantitative elements with a mixed approach that included Focus Group Discussion (FGD) and AHP with the results showing that integrated drainage management was the top priority, followed by sanitation, clean water, reforestation, and sustainable agriculture. Mapping of areas based on geographical characteristics such as rainfall, slope, and soil type provided a map of water infiltration rates that became a key guide in planning water conservation programs. This research has positive implications in supporting sustainable agricultural practices and local economic empowerment. The results of the AHP analysis and area mapping form a strong framework for the development of a sustainable lemon agro-industry with positive economic and environmental impacts.
The Implementation of Micro/Nanobubbles (MNBs) Technology to Treat Basin Water as The Primary Water Source for Hydroponics in Greenhouse Yusuf, Asep; Asdak, Chay; Muhaemin, Mimin; N.P, Sophia Dwiratna; Sugiarto, Anto Tri; Alam, Hilman Syaeful
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 1 (2024): March 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i1.197-204

Abstract

The greenhouse plays a pivotal role in creating an ideal environment for hydroponic cultivation. The greenhouse has utilized rainwater and basin water as a source of raw water for hydroponic farming. Presently, the water quality of Leuwi Padjadjaran basin fails to meet the standards required for hydroponics due to its turbidity, sediment content, discoloration, pH levels exceeding 7, and low dissolved oxygen (DO) concentration of 2.2 mg/l. The micro/nanobubbles (MNBs) technology stands as a viable method for water treatment owing to its capacity to bind impurities via radical OH. The application of MNBs for the treatment of basin water involves the use of a hydrodynamic cavitation MNBs generator with a dual-chamber rotating flow nozzle. The parameters evaluated in this research encompass DO concentration, MNBs stability, microbubble size, and the visual response to MNBs application. MNBs treatment was conducted with three different gases: air, oxygen, and ozone. Microbubbles were measured using the particle image velocimetry (PIV) method. The DO concentration reaches 21.6 mg/l when employing oxygen-based MNBs. On the third day post-generation, MNBs stability still maintains DO concentrations above the initial levels. Thus it can be used as hydroponic raw water.  Keywords:  DO concentration, Greenhouse, Micro/nanobubbles, Water treatment.
The Application of Nanobubble Technology in Hydroponic SWU-01 to Increase Dissolved Oxygen Concentration and Lettuce Plant Growth Yusuf, Asep; Asdak, Chay; Muhaemin, Mimin; Fuadah, Eza Zahrotul; Dwiratna, Sophia; Nanda, Muhammad Achirul; Sugiarto, Anto Tri; Alam, Hilman Syaeful
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 13 No. 4 (2024): December 2024
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v13i4.1395-1402

Abstract

Hydroponic model SWU-01 is a new hydroponic system innovation that regulates watering automatically and independently by utilizing gravity and Archimedes' law. Dissolved oxygen concentration in SWU-01 is only around 3-4.2 mg/L. DO values can be increased by applying nanobubble technology. Ultrafine bubble or nanobubble is a gas bubble in a liquid that has a diameter of <200 nm. The purpose of this study was to determine the effect of nanobubble on dissolved oxygen concentration and growth of lettuce plants cultivated with SWU-01 hydroponics. The experiment used a one-factor randomized complete block design, namely intermittent administration of nanobubble for 15 min every 3 day (P1) and 7 days (P2), and without nanobubble (P0l). The results obtained based on the ANOVA test at the 5% level with the Least Significant Difference (LSD) follow-up test, namely the parameters of fresh weight and number of leaves of lettuce P1 significantly different from P0 and P2, and no significant differences were found in root length, canopy width, and plant height. The P1 treatment is more effective in increasing dissolved oxygen concentration, leaf count, and fresh weight of lettuce produced in lettuce cultivation using the SWU-01 hydroponic system. Keywords: Dissolved oxygen, Hydroponics, Lettuce, Nanobubbles, Plant growth.
Water Balance Analysis Using the Thornthwaite-Mather Method as a Basis for Cropping Pattern Development in Dry Land Dwiratna, Sophia; Ayu, Yogina Lestari; Asdak, Chay; Pithaloka, Nabila Aura
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 2 (2025): April 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v14i2.547-559

Abstract

Soil water availability is crucial for supporting plant growth, especially in drylands that rely on rainfall as the primary source to meet plant water needs. Rainfall variability complicates the prediction of planting times and the optimization of cropping patterns. This condition negatively impacts productivity and increases the risk of flooding and landslides. This study aims to analyze the land water balance using the Thornthwaite Mather method on nine existing planting patterns and schedules, and to recommend strategies that can be implemented to prevent water deficit conditions. A descriptive method with a quantitative approach was used to analyze agroclimatic data to identify periods of water surplus and deficit. The results of the water balance analysis show that water surplus occurs from November to May, while deficit occurs from June to October. Conservation strategies, such as rainwater harvesting through microcatchment and macrocatchment systems, are proposed as effective approaches to address water deficit. These strategies can increase water availability, reduce the risk of crop failure, and optimize the use of available water resources. This study is expected to serve as a foundation for developing adaptive cropping patterns and enhancing the sustainability of the agricultural sector in the face of climate change. Keywords: Dry land, Rainwater harvesting, Thornthwaite-Mather, Water balance, Water management.
Effectiveness of Nanobubble Technology with Gas Variations in Improving the Quality of Vetiver Wastewater and River Water Yusuf, Asep; Nurrachman, Mochamad Anfasa; Nanda, Muhammad Achirul; Asdak, Chay
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 4 (2025): August 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i4.1489-1495

Abstract

Improving the quality of wastewater and river water is a critical priority for environmental conservation. Vetiver root wastewater and water from the Citepus River in the Cikamiri sub-watershed, Garut Regency, have the potential to cause pollution that affects water quality and local ecosystems. This study evaluated different gases (air, oxygen, and ozone) during the application of nanobubble technology to improve the quality of vetiver root wastewater and Citepus River water in the Cikamiri sub-watershed. Parameters measured were DO, pH, and TDS before and during 15-minute nanobubble treatment. Results showed that oxygen and ozone gases significantly increased DO content of the wastewater and river water. In addition, ozone gas improved pH in river water, and decreased TDS most effectively with ozone. It was concluded that nanobubble technology has potential for enhancing wastewater treatment and river conservation.
KAJIAN PEMBUANGAN LIMBAH INDUSTRI BATU ALAM TERHADAP KUALITAS AIR IRIGASI DESA PANONGAN KECAMATAN PALIMANAN KABUPATEN CIREBON Santika, Silvy; Asdak, Chay; Suryadi, Edy
Jurnal Indonesia Sosial Sains Vol. 2 No. 10 (2021): Jurnal Indonesia Sosial Sains
Publisher : CV. Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jiss.v2i10.438

Abstract

Sungai merupakan salah satu sumberdaya air yang sangat dibutuhkan bagi makhluk hidup. Fungsi sungai yaitu sumber air minum, sarana transportasi, irigasi, perikanan, dan sebagainya. Sungai dekat kawasan industri batu alam di Kecamatan Palimanan, Cirebon yaitu Sungai Jamblang, berfungsi sebagai sumber air irigasi Desa Panongan. Sungai Jamblang berpotensi tercemar limbah cair batu alam yang berdampak pada kualitas air irigasi Desa Panongan. Penelitian ini bertujuan untuk mengetahui proses pembuangan limbah cair batu alam di sekitar Sungai Jamblang dan dampak limbah cair batu alam terhadap kualitas air irigasi Desa Panongan. Metode dalam penelitian ini yaitu metode deskriptif dan metode Storet. Parameter uji dalam penelitian ini meliputi pH, DHL, TDS, NO3, Cl, B, PO4, dan K dari setiap titik lokasi pengambilan sampel air. Hasil pengujian dilakukan di PT. Sucofindo kemudian dihitung menggunakan metode Storet. Status mutu air Sungai Jamblang di titik 1 yaitu cemar sedang dan air Sungai Jamblang di titik 2 yaitu cemar berat. Status mutu air irigasi Desa Panongan yaitu cemar sedang. Status mutu air yang diperoleh menunjukkan bahwa adanya limbah cair batu alam berdampak pada kualitas air irigasi, namun tidak semua parameter kualitas air irigasi yang melebihi baku mutu air buruk bagi tanaman pertanian di Desa Panongan.
Analisis Kelayakan Finansial Usahatani Kopi Monokultur dan Agroforestri (Studi Kasus Kelompok Tani Bina Bakti, Sub-DAS Cikamiri, Jawa Barat) Ciptaningtyas, Drupadi; Abdurrahman, Muhammad Zhafir; Thoriq, Ahmad; Asdak, Chay
Teknotan: Jurnal Industri Teknologi Pertanian Vol 19, No 3 (2025): TEKNOTAN, Desember 2025
Publisher : Fakultas Teknologi Industri Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/jt.vol19n3.1

Abstract

Kecamatan Samarang merupakan salah satu daerah penghasil kopi di Kabupaten Garut yang menghadapi ancaman ekologis berupa degradasi lahan akibat konversi hutan menjadi perkebunan kopi, terutama pada usahatani kopi pola monokultur. Pola agroforestri yang mengintegrasikan prinsip konservasi lahan menjadi alternatif yang potensial untuk menyelesaikan permasalahan ini. Penelitian ini bertujuan untuk mengevaluasi kelayakan finansial usahatani kopi pola monokultur dan agroforestri di Kecamatan Samarang berdasarkan kriteria kelayakan investasi yaitu Net Present Value (NPV), net Benefit-Cost Ratio (net B/C), Internal Rate of Return (IRR), dan payback period. Hasil penelitian menunjukkan bahwa kedua pola usahatani tersebut layak secara finansial. Dengan discount factor sebesar 14%, usahatani kopi pola monokultur menghasilkan NPV sebesar Rp28.851.760, net B/C 1,54, dan IRR 23,13%, dengan pengembalian modal pada tahun ke-7. Sementara itu, usahatani kopi pola agroforestri menghasilkan NPV sebesar Rp197.310.592, net B/C 4,54, dan IRR 47,48%, dengan pengembalian modal pada tahun ke-6. Temuan ini mengindikasikan bahwa pola agroforestri tidak hanya lebih menguntungkan secara finansial tetapi juga mendukung keberlanjutan ekosistem, sehingga diharapkan dapat menjadi pendekatan alternatif bagi petani dalam mengelola usahatani kopi di Kecamatan Samarang.
Co-Authors Abdurrahman, Muhammad Zhafir Ahmad Thoriq Amalia, Nabilla Fauzi Amiruddin A.Dajaan Imami Andiles Kusnadi Sentosa Anto Tri Sugiarto Anto Tri Sugiarto Asep Yusuf Asri Widyasanti Ayu, Yogina Lestari B Budiono Benny Joy Boy Macklin Pareira Prawiranegara Devi Maulida Rahmah Dinda Febrima Napitupulu Drupadi Ciptaningtyas Dwi Rustam Kendarto Edy Suryadi Efan Yudha Winata Eza Zahrotul Fuadah Fifi Dwi Pratiwi Fuadah, Eza Zahrotul Gunawan, Budhi Hendarmawan Hendarmawan, Hendarmawan Hilman Syaeful Alam Hilman Syaeful Alam Hilman Syaeful Alam Ida Nurlinda Iga Maliga Ihsan, Daffa Aufa Irfan Ardiansah Iwan Setiawan Kharistya Amaru Leon J. Bran Marjan Siti Maryam Mimin Muhaemin Moh. Dede Muhammad Achirul Nanda N.P, Sophia Dwiratna Nabila Aura Pithaloka Nadia Astriani Nugroho, Chrismaria Putri Nurpilihan Bafdal Nurrachman, Mochamad Anfasa Octoyne, Aisyah Pari kesit Parikesit Parikesit Pithaloka, Nabila Aura Primus Metafaty Daeli Raden Bramadi Nugraha Wargadibrata Ramdhon Bermanakusumah Santika, Silvy Saraswati, Gredia Sekar Selly Harnesa Putri Setiawan, Ditriz Silvy Santika SIska Rasiska, SIska Sophia Dwiratna Sophia Dwiratna Sophia Dwiratna N.P Sophia Dwiratna, Sophia Subiyanto Subiyanto Subiyanto Sudarjat Sudarjat Sugiarto, Anto Tri Sunardi Sunardi SURYADI, DEDE Wagiono - Wahyu Kristian Sugandi Widiyatno Widiyatno Wilda Naily Yogina Lestari Ayu Yogina Lestari Ayu Yogina Lestari Ayu Situmorang Yohanes Christian Yulizar Yulizar Yulizar