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All Journal Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Syntax Literate: Jurnal Ilmiah Indonesia Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering)
Hanggar Ganara Mawandha
Department Of Agricultural And Biosystems Engineering, Faculty Of Agricultural Technology, Universitas Gadjah Mada
Agriculture, Biological Sciences & Forestry Humanities Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences Other

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Spatial Modeling of Vegetation Cover for Soil Erosion Control Based on Arc GIS and the RUSLE Models Dimas Prabowo Harliando; Chandra Setyawan; Hanggar Ganara Mawandha
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 12, No 1 (2023): March 2023
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtep-l.v12i1.14-27

Abstract

Deforestation in the Serayu watershed, Central Java province, Indonesia for agriculture and other uses leaves only 0.73% of vegetation. It has triggered a number of problems such as soil loss (erosion), landslides, floods and sedimentation downstream. Environmental damage control needs to be applied through appropriate conservation programs. This study aims to understand the distribution of soil erosion and the effectiveness of soil erosion control by using vegetation cover. Soil erosion modeling and its correlation to vegetation cover was performed by using an Arc GIS based model of the Revised Universal Soil Loss Equation (RUSLE) through five scenarios of vegetation landscape cover such as 10%, 15%, 20%, 25%, and 30% of the total area of the study site. Five parameters namely rain erosivity (R), soil erodibility (K), slope-length (LS) and crop management (C) and conservation practices (P) factor were used to calculate soil erosion. The results indicated 82.25 tons/ha/year soil erosion reduction due to enhancement of vegetation cover from the actual condition 0.73% to the 30% vegetation cover condition. The increase of 5% vegetation landscape cover (forest) detracted the soil erosion rate by 10,20 tons /ha/year. Very high and high soil erosion hazard levels were found in the northern, east, and west watershed areasKeywords:   Soil erosion, RUSLE model, GIS, Serayu watershed, Vegetation cover
Effect of Biogas Slurry Fertilizer on Dynamics of Soil Consistency and Tillage Power Requirement Cicilia Candra Palupi; Ngadisih Ngadisih; Joko Nugroho Wahyu Karyadi; Rose Tirtalistyani; Muhammad Heikal Ismail; Hanggar Ganara Mawandha
Jurnal Ilmiah Rekayasa Pertanian dan Biosistem Vol 10 No 1 (2022): Jurnal Ilmiah Rekayasa Pertanian dan Biosistem
Publisher : Fakultas Teknologi Pangan & Agroindustri (Fatepa) Universitas Mataram dan Perhimpunan Teknik Pertanian (PERTETA)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (621.344 KB) | DOI: 10.29303/jrpb.v10i1.318

Abstract

Biogas slurry (BS) is a waste used as an organic fertilizer that could improve soil properties. This study was aimed to explore the dynamic of soil consistency and tillage power requirement due to BS fertilizer. Soil consistency and tillage power requirement were analyzed by the liquid (LL), plastic (PL), and adhesive (AL) limits, plasticity index (PI), workability range (WR), and liquidity index (LI). The study was conducted with incubation time and the BS type factors that include control (K), liquid BS (P1), and solid BS (P2). The incubation time factors comprised 2 (I1), 4 (I2), 6 (I3), 8 (I4), 10 (I5), and 12 weeks incubation (I6). The ANOVA test showed that BS fertilizer significantly affected LL, PL, AL, PI, and LI but did not significantly impact WR. The liquid BS fertilizer decreased LL and PI by 2%, increased LI 0.022, and decreased tillage power requirement by 1 horse power (HP). The solid BS, increased LL and PL 3%, PL 3% and AL 2%, while LI decreased by 0.074. The mathematic modeling with a first-order kinetic model was acceptable to describe soil consistency and tillage power requirement (R2>80% and X2<X2 table). The rate of AL for K, P1, and P2 were -0.022/day, -0.032/day, and -0.049/day, respectively. The minus is symbol of decreasing rate. The rate of WR for K, P1, and P2 were 0.024/day, 0.046/day, and 0.079/day, respectively. The form of BS fertilizer (liquid, solid) has changed the soil consistency which in turn has an impact on tillage power requirement.
Evaluasi Kinerja Daerah Irigasi Jejeruk Kabupaten Magetan Berdasarkan Peraturan Menteri PUPR NO 12/PRT/M/2015 Erni Mulyandari; Suryo Handoyo; Hanggar Ganara Mawandha; Lalu Marhayani Kesuma
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (362.282 KB) | DOI: 10.36418/syntax-literate.v7i11.9861

Abstract

Bendung Jejeruk berada pada koordinat 7°39'41" LS dan 111°28'37,56" BT, tepatnya terletak di desa Candirejo, Magetan, Magetan, Jawa Timur. Bendung tersebut memiliki fungsi untuk melayani daerah irigasi lintas kabupaten (Kabupaten Magetan dan Kabupaten Madiun) seluas 5.064 ha. Pada saat ini, Bendung Jejeruk masih kurang optimal dalam mengalirkan air untuk irigasi. Hal tersebut dapat dilihat dari beberapa masalah yang ada di saluran irigasi seperti hilang atau rusaknya beberapa bangunan pengatur atau bangunan pelengkap, rusaknya lining saluran sehingga air tidak bisa secara optimal sampai ke saluran tersier atau kuarter, dan banyaknya sampah yang menumpuk di beberapa titik saluran. Berdasarkan permasalahan tersebut, perlu dilakukan penelusuran jaringan irigasi dan untuk selanjutnya dilakukan evaluasi kinerja di DI Jejeruk berdasarkan Permen PUPR No. 12/PRT/M/2015. Hasil penelusuran jaringan irigasi diperoleh bahwa saluran pembawa utama DI Jejeruk rata-rata berbentuk trapesium dengan material konstruksi pasangan batu. Adapun jumlah saluran yang dimiliki DI Jejeruk yaitu dua saluran primer dan 10 saluran sekunder sedangkan untuk jumlah aset bangunan secara keseluruhan yaitu 55 bangunan pengatur dan 307 bangunan pelengkap. Pada analisis penilaian kinerja DI Jejeruk diperoleh nilai total sebesar 61.33% yang berarti kinerja DI Jejeruk masuk ke dalam kategori kurang dan perlu perhatian.
Modeling River Water Levels in Tidal Swamp Areas using HEC–RAS to Determine the Hydrotopography of Tidal Farmland Faiz Afnan Nurrahman; Chandra Setyawan; Hanggar Ganara Mawandha
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.v14i2.685-700

Abstract

Swamp land is a natural resource that can be utilized to improve community welfare, because swamp land is one of the potential natural resources and can be used as agricultural land development. The aim of this research is to analyze the tidal water movement patterns of rivers and channels in the swamp irrigation area of Palingkau. The stages in this research included the installation of an Automatic Water Level Recorder (AWLR) to collect real-time water level data, then modeling the tidal movement of river water level using HEC–RAS modeling. The results of this research showed that the pattern of tidal water flow movement in the swamp irrigation area of Palingkau is diurnal tide, characterized by the existence of one high tide and one low tide in one day. Furthermore, HEC–RAS modeling can be used to describe the tide of water levels in the swamp irrigation area of Palingkau. Validation of the HEC–RAS model shows that the tidal flow modeling simulation is good and very suitable for use. Based on the hydrotopography class, the land at the research location is classified into 3 classes, namely hydrotopography classes of B, C, and D. Keywords: Agriculture, HEC–RAS Modeling, Hydrotopography, Land, Swamp.
Influence of Fertilizer and Mulch Types on Growth and Yield of Curly Chili (Capsicum annuum L.) Tanjung, Jeane Claudea; Nugroho, Bayu Dwi Apri; Mawandha, Hanggar Ganara; Ardhitama, Aristya; Wulan, Indah Retno
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.v14i4.1222-1232

Abstract

Application of fertilizers and mulches can potentially improve crop productivity. However, the effectiveness and sustainability of these inputs depend on how they are managed. The objective of this study is to evaluate the effects of organic and chemical fertilizers, and plastic and bamboo leaf mulches, on the physiological growth and productivity of curly chili (Capsicum annuum L.). Experiment was performed according to a randomized block design with two factors. First factor was fertilizer (P) types consisting of three levels, namely: P0 (no fertilizer), P1 (ecoenzyme organic fertilizer), and P2 (NPK fertilizer). The second factor is the type of mulch (M) consisted of three levels, including M0 (without mulch), M1 (bamboo leaf mulch), and M2 (plastic mulch). Independent parameters included plant height, leaf number, and fruit weight. Results showed that fertilizer type had no significant effect, while plastic mulch significantly improved all parameters. No interaction was observed. These results suggest that plastic mulch effectively enhances chili growth and yield, particularly in the vegetative stage, but its long-term effects warrant further research.   Keywords: Bamboo leaf mulch, Chemical fertilizer, Curly chili, Organic fertilizer, Plastic mulch.
Modeling River Water Levels in Tidal Swamp Areas using HEC–RAS to Determine the Hydrotopography of Tidal Farmland Nurrahman, Faiz Afnan; Setyawan, Chandra; Mawandha, Hanggar Ganara
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.v14i2.685-700

Abstract

Swamp land is a natural resource that can be utilized to improve community welfare, because swamp land is one of the potential natural resources and can be used as agricultural land development. The aim of this research is to analyze the tidal water movement patterns of rivers and channels in the swamp irrigation area of Palingkau. The stages in this research included the installation of an Automatic Water Level Recorder (AWLR) to collect real-time water level data, then modeling the tidal movement of river water level using HEC–RAS modeling. The results of this research showed that the pattern of tidal water flow movement in the swamp irrigation area of Palingkau is diurnal tide, characterized by the existence of one high tide and one low tide in one day. Furthermore, HEC–RAS modeling can be used to describe the tide of water levels in the swamp irrigation area of Palingkau. Validation of the HEC–RAS model shows that the tidal flow modeling simulation is good and very suitable for use. Based on the hydrotopography class, the land at the research location is classified into 3 classes, namely hydrotopography classes of B, C, and D. Keywords: Agriculture, HEC–RAS Modeling, Hydrotopography, Land, Swamp.
Co-Authors Aristya Ardhitama, Aristya Bayu Dwi Apri Nugroho, Bayu Dwi Apri Chandra Setyawan, Chandra Cicilia Candra Palupi Dimas Prabowo Harliando Erni Mulyandari Faiz Afnan Nurrahman Joko Nugroho Wahyu Karyadi Lalu Marhayani Kesuma Muhammad Heikal Ismail Ngadisih Ngadisih Nurrahman, Faiz Afnan Rose Tirtalistyani Suryo Handoyo Tanjung, Jeane Claudea Wulan, Indah Retno