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Prastowo Prastowo
Departemen Teknik Pertanian, Fateta-IPB, Kampus IPB Darmaga Bogor 16680
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Engineering

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Pemanenan Air Hujan Mengunakan Konsep Zero Runoff System (ZROS) dalam Pengelolaan Lahan Pala Berkelanjutan Fachruddin Fachruddin; Budi Indra Setiawan; Mustafril Mustafril; Prastowo Prastowo
Jurnal Teknik Sipil Vol 22 No 2 (2015)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/jts.2015.22.2.6

Abstract

Abstrak. Kabupaten Aceh Selatan memiliki rerata curah hujan bulanan yang sangat tinggi sebesar 281,4 mm/bulan, sehingga memiliki potensi aliran permukaan yang tinggi. Ketersediaan curah hujan yang melimpah pada musim hujan belum dimanfaatkan secara optimal pada musim kemarau. Air hujan sebagian akan menjadi aliran permukaan sehingga tidak bisa dimanfaatkan tanaman secara efektif. Dampak dari terjadinya aliran permukaan yang tinggi akan menyebabkan hilang humus tanah sehingga terjadinya penurunan kesuburan lahan. Desain teknis sistem pemanenan air hujan yang efektif untuk konservasi air tanah dan memenuhi kebutuhan air tanaman pala telah dapat dibuat dengan rincian sebagai berikut: Sistem pemanenan air hujan pada penelitian ini menggunakan rorak yang dilengkapi saluran peresapan. Tata letak rorak dan saluran peresapan menyesuaikan dengan kontur lahan. Dimensi rorak ditentukan sesuai dengan debit aliran permukaan, yaitu kedalaman maksimal 30 cm dengan lebar 40 cm danpanjang 100 cm. Setiap rorak disertai saluran peresapan dari sisi kiri dan kanan dengan panjang 100 cm, dalam 10 cm dan lebar 20 cm.Abstract. South Aceh district has a very high average monthly rainfall of 281.4 mm/month, so it has a high potential of runoff. The availability of abundant rainfall during the rainy season has not been used optimally in dry season. A part of rainfall would become surface flow so that the plant cannot use it effectively. The impact of high surface flow will cause in loss of soil humus which leads to the decline of soil fertility. Technical design of rainwater harvesting systems which is effective for soil and groundwater conservation and for fulfil water needs from nutmeg crops could be constructed as : rainwater harvesting systems by using rorak equipped with infiltration channels. Rorak layout and channel infiltration should be adjusted to the contour of the land. Rorak dimensions are determined by the discharge of surface flow, which has the maximum depth of 30 cm, width of 40 cm and length of 100 cm. Each rorak is built with infiltration channels on the left and right side with lengt hand depth of 10 cm and width of 20 cm.
REVIEW TRICKLE IRRIGATION APPLICATION IN GROUNDWATER IRRIGATION SCHEMES Prastowo .; S. Hardjoamidjojo; Bambang Pramudya; K. Murtilaksono
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

ABSTRACT The Government of Indonesia has developed groundwater irrigation schemes in some province e.g. East Java, Central Java, Yogyakarta, Wast Java, Bali, West Nusa Tenggara and East Nusa Tenggara. However, not all regions were able to optimally utilize it. The irrigation effeciency of groundwater irrigation scheme was about 59%, whe;; the wells-pumping efficiencies were varied from 28 to 98 %. In thefuture, the irrigation effieciency should be increased to anticipate water deficit during dry season. The application of trickle irrigation in indonesia has not been widely developed. Although trickle system has been used, however, it is still limited for few commercial agribusinesses. Trickle irrigation systems have a prospect to be developed in some regions having limited water resources. For preliminary stage, the systems could be applied in groundwater irrigation schemes that have been developed either by farmers or government. Keywords: irrigation effieciency, trickle irrigation, groundwater irrigation schemes
RANCANGAN HIDROLlKA IRIGASI TETES UNTUK TANAMAN SEMANGKA DI LAHAN KELOMPOK TANI SEROPAN MAKMUR, KABUPATEN GUNUNG KIDUL, D.I. YOGYAKARTA Prastowo Prastowo; S. Hardjoamidjojo; Y. K. Awang
Jurnal Keteknikan Pertanian Vol. 21 No. 1 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.1.%p

Abstract

ABSTRACT Hydraulic design of trickle irrigation sub unit is very important to achieve high irrigation uniformity and efficiency of its schemes. The sub unit is a pipeline in a trickle irrigation block which is consists of a manifold line, some laterals and emitters. The hydraulic criteria has been used in the design of trickle irrigation scheme for water melon (Citrullus vulgaris L.) at an existing pipeline system of surface irrigation scheme in Seropan Area, Yogyakarta. The hydraulic criteria includes pipeline hydraulics of lateral and manifold, system capacity, and total dynamic head. The number and size of sub unit has been designed, and the head losses (hf) at lateral and manifold were ≤ 11% and ≤ 9% of emitter operating pressure (Ha) respectivel. Theoritically,  variation of emitter discharge will vary at 1.16-1.61%. Diterima: 2 Januari 2007; Disetujui: 30 Januari 2007 
IRRIGATION EFFICIENCY AND UNIFORMITY OF AEROPONICS SYSTEM Prastowo Prastowo; S. Hardjoamidjojo; N. Laelasari
Jurnal Keteknikan Pertanian Vol. 21 No. 2 (2007): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19028/jtep.021.2.%p

Abstract

ABSTRACT The evaluation of the irrigation efficiency and coefficient of unttotmity (CU) of the existing aeroponics system has been conducted for one growing season of petsai (Brassica pekinensis L) in Parung - Bogor, Indonesia. The evaluation covers the CU of the spray discharge, pH, temperature and electrical conductivity (EC) of the nutrient solution. It was concluded that the CU of spray discharge, pH and temperature of the nutrient solution were relatively high, but the CU of EC of the nutrient solution was relatively low. Conveyance efficiency and water-use efficiency were about 84.38% and 40.09%, respectively. The average crop water requirement was about 1,457 cc/crop/season or equal to 16,870 cc per Kg of petsai produced. Diterima: 02 Januari 2007, Disetujui: 19 Pebruari 2007
Analisis Alternatif Solusi Penyediaan Sumber Energi Listrik Studi Kasus: Kabupaten Kupang Rusman Sinaga; Armansyah Halomoan Tambunan; Prastowo Prastowo; Bintang Charles Hamonangan Simangunsong
Jurnal Keteknikan Pertanian Vol. 5 No. 3 (2017): JURNAL KETEKNIKAN PERTANIAN
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1814.392 KB) | DOI: 10.19028/jtep.05.3.283-290

Abstract

AbstractKupang is one of the districts in Indonesia which has low electrification ratio that is about 60%. There are still 32 out of 177 villages having no access to Electrical Energy Sources (EES) supply. It means that there are 30,910 out of 78,011 households without access to electricity supply. The barriers for supplying the electricity were the difficulties to reach the location due to its geographical conditions. This research was aimed to analyze and select the appropriate electrical power system for using the available primary energy resources in the rural area of Kupang district, bounded with three criteria, namely environmentally friendly, efficient, and effective. The results of Analytical Hierarchy Process of the alternative solutions to the provision of EER in Kupang district found that the first option is the solar photovoltaic power system/PLTS (41%), the second option is wind power system/PLTB (27.5%), the third option is microgrid power system/ MG (20.8%) and the fourth is hybrids power system/PLTH (10.8%). AbstrakKupang merupakan salah satu Kabupaten di Indonesia yang memiliki rasio elektrifikasi yang rendah yaitu sekitar 60%. Di Kabupaten Kupang masih terdapat 32 dari 177 desa yang belum mendapatkan pasokan Sumber Energi Listrik (SEL). Hal ini berarti bahwa 30,910 dari 78,011 rumah tangga belum mendapatkan pasokan listrik. Kendala utama pemasokan SEL adalah kondisi georafis yang sulit dijangkau. Tujuan penelitian ini adalah untuk menganalisis dan memilih sistem tenaga listrik untuk penyediaan SEL sesuai dengan sumberdaya energi primer yang dimiliki perdesaan dengan tiga kriteria antara lain ramah lingkungan, efisien dan efektif. Hasil Proses Hirarki Analitik solusi alternatif untuk penyediaan SEL di Kabupaten Kupang ditemukan bahwa pilihan pertama adalah sistem tenaga surya fotovoltaik/PLTS (41%), pilihan kedua adalah sistem tenaga angin/PLTB (27.5%), opsi ketiga adalah sistem microgrid/MG (20.8%) dan yang keempat adalah sistem tenaga hibrida/PLTH (10.8%).
Peningkatan Resapan Air Tanah dengan Saluran Resapan dan Rorak untuk Meningkatkan Produktivitas Belimbing Manis (Studi Kasus di Kota Depok) Yanto Surdianto; Budi Indra Setiawan; Prastowo Prastowo; Satyanto Krido Saptomo
Jurnal Irigasi Vol 7, No 1 (2012): Jurnal Irigasi
Publisher : Balai Teknik Irigasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (840.363 KB) | DOI: 10.31028/ji.v7.i1.1-15

Abstract

Problem faced by star fruit farmers in Depok, West Java, is water availability relying only on rainfed. Therefore, research related to water conservation technique for optimum utilization of rain water and runoff at the starfruit orchard was conducted. The objectives of the research were: 1) The relationship between rainfall, evapotranspiration with starfruit productivity, 2) To find out the effects of soil water absoption on starfruit productivity , and 3) To develope water balance analytical model without runoff for sweet starfruit orchard. In this experiment the water table was approximately 16 m from soil surface, no irrigation was used and water storage canals equipped with silt pits were constructed so that runoff component and contribution of water capillarity movement were zero. The research results showed that: 1) The rainfall and evapotranspiration had influence on the starfruit productivity; 2) The relatively high rainfall followed by high soil water content at the rooting zone, ranging from 0,429 to 0,458 m3/m3, enabled the star fruit to have year-round production with four times harvesting; 3) The water balance analytical model without runoff could nicely simulate the soil water content at the rooting zone with R2 of 0,83.
Co-Authors Armansyah Halomoan Tambunan Bambang Pramudya Bintang C. H. Simangunsong Budi Indra Setiawan Fachruddin Fachruddin K. Murtilaksono Mustafril Mustafril N. Laelasari Rusman Sinaga S. Hardjoamidjojo S. Hardjoamidjojo S. Hardjoamidjojo Satyanto Krido Saptomo Y. K. Awang Yanto Surdianto