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All Journal Jurnal Keteknikan Pertanian agriTECH Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Agricultural Biosystem Engineering

Ridwan Ridwan

Fakultas Pertanian, Universitas Lampung

Author-ID : 2870626

Agriculture, Biological Sciences & Forestry Automotive Engineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Materials Science & Nanotechnology

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Articles

Manajemen Sumberdaya Air Daerah Aliran Sungai Sekampung di Antara Bendungan Batutegi dan Bendung Argoguruh, Propinsi Lampung: Kerangka Analitis Penyusunan Pola Operasional Waduk Harian Ridwan Ridwan; Putu Sudira; Sahid Susanto; Lilik Sutiarso
agriTECH Vol 33, No 2 (2013)
Publisher : Faculty of Agricultural Technology, Universitas Gadjah Mada, Yogyakarta, Indonesia

This paper present a technical analysis for obtaining an operating procedure of reservoir referred to water level reservoir and daily water availability at stream flows. Reservoir water level conditions Batutegi since starting operations in 2004 has never reached the normal elevation (+274 m), allegedly as a result of the decline in reservoir inflow discharge Batutegi on one side and on the other hand an increase in outflow discharge to meet the demand (demand) irrigation water by the dam Argoguruh. The increasing demand for water in the dam due to declining Argoguruh Sekampung river discharge from the dam catchment Argoguruh. Management of water resources between the two buildings is not optimal water resources to meet a variety of needs, especially irrigation. The objectives were to promote a watershed resources management system analysis which has two water buildings connected functionally and formulating reservoir daily operational pattern based on the consideration of the water availability at reservoir and river as one integrated water resources management system. Technical analisys which were proposed is the combination of empiric formula approach and SWAT model utilization calibrated to predict water yield of the basin. Technical analysis is done by stages in the process of succession, namely (1) caliberation SWAT model, (2) Analysis of Water Yield, (3) analysis of streamflow (river routing), (4) analysis of river water availability (supply), (5) Analysis of water demand, (6) analysis of water supply reservoirs, and (7) analysis of needs release. Results of the analysis technique was tested by studying the behavior of water supply reservoirs (reservoir routing) test the accuracy of water allocation and use of test reliability with a minimum target of 80%. This analysis method will acquire water availability at reservoir, daily discharge of stream flow, daily release from reservoir, and a new concept for arrange of Standard Operating Procedure (SOP) of reservoir.ABSTRAKMakalah ini menyajikan suatu teknis analisis yang baru dalam penentuan pola operasi (SOP: Standar Operasi Prosedur) waduk Batutegi harian. Elevasi muka air waduk Batutegi sejak mulai beroperasi pada tahun 2004 belum pernah mencapai posisi elevasi normal (+274 m), diduga sebagai akibat semakin menurunnya debit inflow waduk Batutegi pada satu sisi dan di sisi lain terjadi peningkatan debit outflow untuk memenuhi permintaan (demand) air irigasi oleh Bendung Argoguruh. Meningkatnya permintaan air di Bendung Argoguruh akibat menurunnya debit Sungai Sekampung yang berasal dari daerah tangkapan hujan Bendung Argoguruh. Manajemen sumberdaya air di antara kedua bangunan sumberdaya air tersebut belum optimal untuk memenuhi berbagai kebutuhan, terutama irigasi. Tujuan penulisan makalah adalah untuk mempromosikan satu teknik analisis sistem sumberdaya air pada suatu daerah aliran sungai (DAS) yang memiliki dua bangunan air yang terhubung secara fungsional serta merumuskan pola operasional waduk harian berdasarkan ketersediaan air di waduk dan di sungai sebagai salah satu sistem pengelolaan sumberdaya air terpadu. Teknik analisis yang diusulkan menggunakan kombinasi dari penggunaan rumus empiris dan model SWAT yang sudah dikalibrasi untuk memprediksi produksi air DAS harian. Teknik analisis dilakukan dengan tahapan proses secara berturut-turut, yaitu (1) Kaliberasi Model SWAT, (2) Analisis Water Yield DAS, (3) Analisis penelusuran debit sungai (river routing), (4) Analisis ketersediaan air sungai (supply), (5) Analisis kebutuhan air (demand), (6) Analisis ketersediaan air waduk, dan (7) Analisis kebutuhan release. Hasil teknik analisis diuji dengan mempelajari perilaku ketersediaan air waduk (reservoir routing) dan uji ketepatan alokasi air menggunakan uji reliabilitas dengan target minimum 80%. Teknik analisis yang diusulkan dapat digunakan untuk menghitung ketersediaan air pada waduk, debit aliran sungai harian sebagai informasi ketersediaan air di sungai, pelepasan debit harian dari reservoir, dan Standar Operasional Prosedur (SOP) waduk harian.

PENGARUH DEFISIT EVAPOTRANSPIRASI DALAM REGULATED DEFICIT IRRIGATION (RDI) PADA KEDELAI (Glycine Max[L.] Merr.) R. A.Bustomi Rosadi; Ridwan .; Nugroho Haryono; Omi Istiawati
Jurnal Keteknikan Pertanian Vol. 20 No. 1 (2006): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.020.1.%p

ABSTRACT The objective of this research was to investigate the effect of deficit evapotranspiration in regulated deficit irrigation (RDI) on soybean. This research was conducted on an experimental farm under plastic house of Lampung Polytechnique from Augustus to Nupember 2004. The deficit evapotranspiration treatment rates were ET1, (1.0XETC), ET2 (0.8XETC), ET4 (0.4XETC) and ET5 (0.2XETC). Arranged in a randomized block design with four reflications. Irrigation was given at two days interval. The regulated deficit irrigation (RDI) treatment just at vegetative period and its treatmens were stopped at the beginning of flowering phase and afterward the treatmens were watered at 1. 0xetc. The soil water content was monitored by porous blocks. The result showed that soybean plant strated to be stressed at week II with qc = 224.03 %, and Ks = 0.60 when watered at o.6xetc. the optimum yield of soybean plant (31.04 g/plant/0 with CWR=200.39 mm was reached by deficit irrigation at 0.8xetc during the vegetative period. Keywords: ultisol, regulated deficit irrigation, soybean, water stress coefficent

RANCANG BANGUN SISTEM FERTIGASI DENGAN MENGGUNAKAN VENTURIMETER Budianto Lanya; Prabowo Agung Laksono; Mohamad Amin; Ridwan Zahab
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 9, No 2 (2020): Juni 2020
Publisher : The University of Lampung

Di Indonesia banyak petani belum mengenal teknologi-teknologi fertigasi yang akan membantu dan mempermudah pekerjaan para petani-petani di Indonesia. Penelitian ini bertujuan menciptakan alat sistem fertigasi venturimeter, mengetahui debit dari rangkaian sistem, dan debit keluaran nutrisi serta mengetahui debit total dan rasio larutan nutrisi. Penelitian ini dilaksanakan di Laboratorium Daya dan Alat Mesin Pertanian Universitas Lampung pada bulan Juli 2017 sampai Agustus 2017. Rancangan ini menggunakan pipa berukuran 1 inchi dan venturimeter berukuran 1 inchi. Telah dihasilkan alat sistem fertigasi dengan menggunakan venturimeter 1 inchi dengan debit rangkaian sistem irigasi 0,778 l/s, dan debit keluaran nutrisi 0,00106-0,00259 l/s. Alat ini juga memiliki debit total dan rasio larutan nutrisi bervariasi dari jarak vertikal hisap 44 cm, 52 cm, 79 cm, adalah 0,8091 l/s, 0,8038 l/s, 0,7907 l/s dan 0,32 %, 0,26 %, 0,13 %. Kata Kunci : fertigasi, fertigasi venturimeter, venturimeter, dan irigasi fertigasi menggunakan venturimeter.

ANALISIS KOEFISIEN ALIRAN PERMUKAAN PADA BERBAGAI BENTUK PENGGUNAAN LAHAN DENGAN SWAT Danesta Ayu Saputri; Ridwan Ridwan; Mohamad Amin; Sandi Asmara
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 7, No 1 (2018): April
Publisher : The University of Lampung

Way Sekampung Hulu watershed definited as upstream part from Way Sekampung watershed with rain catchment area of 43,063 km2, that located in Tanggamus District of Lampung Province. Land shifting from non-building area to building area will stimulate the magnitude of surface water flow that impacts on the decline of recharge capacity and increased surface water flow that occurs flood in downstream area. The research aim to surface runoff coeffisient values in various land use form of watershed and hydrograph river flow parameter values. The method of this research is approach of hydrology model analysis based GIS, with SWAT model. Data of river flow debit, rainfall, and climatology that used is data record in 2010 until 2015. Process of model calibration with data record in 2010-2012 and model validation with data record in 2013-2015. Result of calibration process with SWAT-CUP are Nse and R2 value for river flow debit (flow out) of 0.63 and 0.66 respectively. Result of model validation are Nse and R2 value of 0.64 and 0.74 respectively. Surface flow coeffisient value (C) for shrubs of 0.13, settlement of 0.22, primary dryland forest of 0.11, open land of 0.44, moor of 0.28 and plantation of 0.15. Analysis result also obtained best values for hydrograph flow parameters such as SURLAG of 0.389, GW_REVAP of 8.451, SOL_AWC of 1.104, EPCO of 0.008, HRU_SLP of 0.898, SLSBBSN of 23.195, CH_N2 of 3.876, ALPHA_BF of 0.636, GW_DELAY of 8.451, ESCO of 1.335 and CN2 of 1.979.

APLIKASI IRIGASI DEFISIT PADA FASE PEMBUNGAAN TANAMAN PADI GOGO (Oryza sativa L.) VARIETAS INPAGO 9 Febrianto Cahya Yosef; RA Bustomi Rosadi; Ridwan Ridwan
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 6, No 2 (2017)
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (384.66 KB)

Penelitian ini bertujuan untuk mengetahui pengaruh aplikasi irigasi defisit pada fase pembungaan tanaman padi gogo varietas Inpago 9. Penelitian ini dilaksanakan di dalam rumah plastik Laboratoritum Lapang Terpadu Universitas Lampung pada bulan Oktober 2016 sampai dengan bulan Maret 2017. Penelitian ini menggunakan rancangan acak lengkap (RAL) dengan 4 taraf perlakuan, yaitu ID1((0-20)-100)% ATT, ID2((0-20)-80)% ATT, ID3((0-20)-60)% ATT, ID4((0-20)-40)% ATT, dan ulangan sebanyak 5 kali. Hasil penelitian menunjukan bahwa, aplikasi irigasi defisit pada fase pembungaan berpengaruh terhadap berat berangkasan padi, produksi padi dan produktivitas air tanaman. Berat berangkasan tanaman tertinggi dicapai oleh perlakuan ID4((0-20)-40)% ATT. Produksi padi tertinggi dicapai oleh perlakuan ID1((0-20)-100)% ATT dengan rata-rata produksi sebesar 45,4 g/ ember. Produktivitas air tanaman tertinggi dicapai oleh perlakuan ID1((0-20)-100)% ATT dengan rata-rata produktivitas air tanaman sebesar 1,01 g/l.Kata Kunci : irigasi defisit, fase pembungaan, padi gogo, dan produktivitas air tanaman

KINERJA SISTEM IRIGASI TINGKAT TERSIER UPTD TRIMURJO DAERAH IRIGASI PUNGGUR UTARA Haposan Maditua Simorangkir; Ridwan Ridwan; M Zen Kadir; Mohamad Amin
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 1 (2019): MARET
Publisher : The University of Lampung

Daerah Irgasi Punggur Utara UPTD Trimurjo merupakan salah satu daerah irigasi yang mengairi sawah fungsional seluas 4.846 ha dari luas baku 6.196 ha. Seiring dengan perkembangan waktu, kondisi perubahan alam sekitar, dan kondisi sosial budaya ekonomi masyarakat sekitar maka suplai dan kebutuhan akan air irigasi untuk mengairi areal sawah yang berada di Daerah Irigasi Punggur Utara UPTD Trimurjo mengalami perubahan. Perubahan kondisi jaringan irigasi dan bangunan pelengkapnya berdampak langsung pada debit air yang dikeluarkan melalui jaringan irigasi tingkat tersier. Berlatar belakang dari permaslahan tersebut maka perlu dilakukan penelitian untuk mengetahui kerapatan saluran dan bangunan jaringan irigasi, kerumitan jaringan irigasi, efisiensi penyaluran air, dan kinerja sistem irigasi tingkat tersier UPTD Trimurjo dari aspek yang dinilai. Penelitian dilakukan dengan metode pengumpulan data sekunder dan data primer. Pengambilan sampel penelitian menggunakan metode stratified purpossive random sampling. Sampel yang diperoleh menggunakan metode stratified purpossive random sampling adalah sebanyak 14 sampel dari 85 petak tersier di UPTD Trimurjo. Dari hasil penelitian diperoleh nilai kerapatan saluran rata-rata sebesar (KS) 70,59 m/ha, kerapatan bangunan rata-rata sebesar (KB) 0,18 Unit/ha, nilai kerumitan jaringan irigasi pada variabel (β) 2,15 ruas/bak bagi dan variabel (θ) rata-rata 810,53 m/bak bagi, dan efisiensi penyaluran air rata-rata sebesar 80,09%. Hasil perhitungan kinerja sistem irigasi tingkat tersier melalui penilaian setiap aspek baik fisik maupun nonfisik mencapai 84,56 %. Hasil penilaian yang dilakukan pada penelitian ini menunjukan bahwa kinerja sistem irigasi pada tingkat tersier di UPTD Trimurjo Daerah Irigasi Punggur Utara sudah sangat baik. Kata kunci: Kinerja sistem irigasi, Sistem irigasi, Irigasi tingkat tersier, Trimurjo, Daerah irigasi punggur utara

Uji Kinerja Portable Rainfall Simulator pada Berbagai Tekanan Pompa Ridwan Ridwan; Oktafri Oktafri; Muhammad Amin; Maya Ardila
Jurnal Agricultural Biosystem Engineering Vol 1, No 3 (2022): September 2022
Publisher : abe.fp.unila.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar

Rainfall simulator is a tool that allows you to create artificial rain simulation as you wish. Rainfall simulator can be used to study runoff, erosion, infiltration, and other events in hydrological processes on a laboratory scale. The purpose of the study was determine the performance of the portable rainfall simulator that had been made with test parameters, namely the discharge radiance value, nozzle constanta, and uniformity coefficient. The test carried out using three variatons of pump pressure treatment, namelay 1.0, 1.3, and 1.6 bar and each treatment was repeated 3 times with a test time of 7.5 minutes. The test result show that the portable rainfall simulator can produce water discharge with uniformity level (CU) greather than 70%. The best pump pressure for the highest uniformity of transmission is 1.6 bar. The pumping pressure affects the water discharge with a uniformity coefficient value (CU), the greather the pump pressure, the greather the water discharge value, and the uniformity coefficient value (CU). The type of nozzle used is good enough to be used as a transmitter from the rainfall simulator that was made. Keywords: Coefficient Uniformity (CU), Discharge, Nozzle, Rain, Rainfall Simulator, Water.

Water Productivity of Mustard Green (Brassica juncea L.) Under Drip Irrigation Systems and Organic Matter Addition Nova Anika; Siti Mutmainah; Muhammad Kusmali; Harmiansyah Harmiansyah; David Septian Sumanto Marpaung; Ridwan Ridwan
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.v14i2.677-684

Drip irrigation technique, in combination with the utilization of organic matter like as biochar and cocopeat, can increase water productivity by tailoring irrigation water to plant demands. This study was to investigate how organic matter can improve water productivity in mustard green production utilizing a drip irrigation technique. The greenhouse pot experiment analyzes the effect of adding varying quantities of biochar and cocopeat to mustard greens' growth medium using a drip irrigation technique. The findings indicate that adding organic matter reduced the quantity of water needed for irrigation. The soil and biochar combination treatment at a 1:1 ratio resulted in the highest water productivity for mustard green, whereas the control treatment produced the least. Mustard green grows optimally in a soil + biochar (1:1) growing medium, yielding the most water productivity at 16.8 g/L. Biochar can boost biomass yield by twice as much as the control treatment. Furthermore, biochar can increase mustard green water productivity by more than 300% when compared to mustard green, which relies solely on soil for planting medium. Further study is needed to investigate the effects of biochar features on water holding capacity, field capacity, and wilting point in different soil types to improve irrigation efficiency. Keywords: Drip irrigation, Irrigation efficiency, Organic matters, Water productivity.

Co-Authors Budianto Lanya Bustomi Rosadi Danesta Ayu Saputri Febrianto Cahya Yosef Haposan Maditua Simorangkir Harmiansyah Harmiansyah Lilik Sutiarso M Zen Kadir Marpaung, David Septian Sumanto Maya Ardila Mohamad Amin Mohamad Amin Muh. Kusmali Muhammad Amin Nova Anika Nugroho Haryono Oktafri Oktafri Omi Istiawati Prabowo Agung Laksono Putu Sudira RA Bustomi Rosadi Sahid Susanto Sandi Asmara Siti Mutmainah

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