Claim Missing Document
Check
Articles

Penentuan Awal dan Durasi Musim Kemarau Menggunakan Fungsi Polynomial dengan Aplikasi Visual Basic for Applications (VBA) Fadli Irsyad; Satyanto Krido Saptomo; Budi Indra Setiawan
Agromet Vol. 28 No. 1 (2014)
Publisher : PERHIMPI (Indonesian Association of Agricultural Meteorology)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (497.975 KB) | DOI: 10.29244/j.agromet.28.1.40-46

Abstract

Forecasting the occurrence of the onset of dry season and its length is important in determining the availability of water for irrigation, domestic and industrial uses. The length of dry season is used for reference in calculating water demand. Prediction of drought can be studied based on the rainfall patterns that have occurred. This is possible because there is a tendency that the rain will repeat a certain pattern at a certain time. The purpose of this study was to predict the onset of dry and rainy seasons as well as their length. Determination of the onset of dry season and its length was conducted using polynomial function of the cumulative amount of rain every single day based on the rain data. The research was conducted using rainfall data from Climate Station III in Serang from 1989 to 2010. The sum of daily rainfall could form a polynomial function. If the magnitude of daily rainfall in a certain period of time is less than the slope of the cumulative annual rainfall, then at that time the dry season is occurred. Determination of the dry season peak can be done by finding the maximum (extreme) point from the polynomial function by getting the second derivative which value is close or equal to zero. In average, the dry season occurred in Serang city started on the 132nd until 300th day. Deviation value for the onset of dry and rainy seasons were 23 and 38 days, respectively, with an average of length of 168 days. The average of R2 value for polynomial function was 0.9937.
Groundwater in the District of Wajo is stored in Siwa-Pompanua basin covering an area of 93,900 ha and discharge of around 379 millions m3/yr.  The groundwater is utilized to irrigate rain-fed rice fields privately by farmers by means of wells.  The distance between wells and pumping rate are designed without considering the characteristics of the aquifer and adequate irrigation management so that damage in environment might occur and consequently farming might not be sustainable.  A research wa Suhardi .; Hidayat Pawitan; Budi Indra Setiawan; Roh Santoso B. Waspodo
Forum Pasca Sarjana Vol. 31 No. 3 (2008): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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

Abstract

Groundwater in the District of Wajo is stored in Siwa-Pompanua basin covering an area of 93,900 ha and discharge of around 379 millions m3/yr.  The groundwater is utilized to irrigate rain-fed rice fields privately by farmers by means of wells.  The distance between wells and pumping rate are designed without considering the characteristics of the aquifer and adequate irrigation management so that damage in environment might occur and consequently farming might not be sustainable.  A research was conducted with the objectives to study the aquifer characteristics and to develop environmentally friendly groundwater management.  Mathematical models were developed by combining equations of conservation of fluid mass (continuity equations) and Darcy’s law, whereas models of groundwater management were based on crop water requirement and aquifer characteristics.  Test of the model resulted in coefficient of determination equal to 0.848 for the prediction of the drawdown groundwater head.  The result of the model optimization indicated the optimum discharge of each of the wells was different.  One of the wells had a the biggest discharge of 1,268.33 m3/day irrigating 27.58 ha and one other  of the wells had a the smallest discharge of 279.54 m3/day irrigating 6.08 ha of paddy fields based on the irrigation water requirement of 45.99 m3/ha.day.  The reasonable minimum area (ha) determined with equation of power function in x, where x are irrigated hours per season.  For one of planting season/yr, the coefficients of the power (α) equal to 0.0123 and the power functions (β) equal to 0.7247, while for two of planting season/yr with α equal to 0.0047 and β equal to 0.8413.   Key words: sustainable groundwater utilization, paddy field irrigation, groundwater management model
Reconstruction of The Inner Baduy’s Ecohouse Structure in Banten Province Meiske Widyarti; Budi Indra Setiawan; Hadi Susilo Arifin; Arief Sabdo Yuwono
Forum Pasca Sarjana Vol. 35 No. 1 (2012): Forum Pascasarjana
Publisher : Forum Pasca Sarjana

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

Abstract

Environment quality has been worsening year by year; and building’s sector contributes 66% of fossil fuels pollution’s sources. The technique in building constructions needs to changing in order to increase environmental friendly manner. Indigenous people, such as the Inner Baduy community, from longstanding experience have developed systems as their local wisdoms adapting to its environment and houses in a sustainable manner. The objective of this study is to emphasize the importance of traditional knowledge in terms of providing low input energy buildings and settlement. A reconstruction of the Inner Baduy house has been drawn as a documentation of an Indonesian traditional house building in a tropical humid climate. The reconstruction is presented in a form of a technical drawings such as plan, view and section  drawing by using SkecthUp computer program. Baduy local wisdom of community is significant  in houseing structure development process. Indications by all the structure materials is taken from local sources such as rumbia roof and bamboo’s wall are taken from leuweung lembur and bantaran sungai. Development system’s local wisdom also very economic and efficient using pre-fabrication system. Key  words:  ecological design, environmental friendly, traditional building, sustainable construction
ESTIMASI EVAPOTRANSPIRASI POTENSIAL MENGGUNAKAN JARINGAN SYARAF TIRUAN Slamet Suprayogi; Budi Indra Setiawan; Suroso Suroso Suroso
Majalah Geografi Indonesia Vol 18, No 1 (2004): Majalah Geografi Indonesia
Publisher : Fakultas Geografi, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (342.549 KB) | DOI: 10.22146/mgi.13265

Abstract

ABSTRAK Berbagai model evapotranspirasi potensial (ETp) telah dikembangkan, mulai dart model-model yang sederhana sampai dengan model-model yang kompleks membutuhkan konversi-konversi dan perhitungan rumit. Model ETp Penman termasuk model yang kompleks membutuhkan parameter-parameter iklim yang cukup banyalcyaitu: suhu udara, kelembaban relatif(relative humidity), kecepatan angin, tekanan uap jenuh (saturation vapor pressure), dan radiasi netto. Proses perhitungannya membutuhkan waktu relatif lama, karena harus melakukan konversi-konversi. Perhitungan ETp dapat dilalcukan secara efisien yalan proses perhitungan cukup singkat dan hasilnya secara basil perhitungan model Penman yaitu dengan model Jaringan SyarafTiruan (Artificial Neural Network), model tersebut merupakan penjabaran fungsi otak manusia (human brain) dalam bentukfungsi matematik yang menjalankan proses perhitungan secara paralel.Tujuan penelitian ini adalah mengestimasi ETp menggunakan model Jaringan Syaraf Tiruan (JST) dengan penjalaran balik (backpropagation). Data yang digunakan adalah data parameter iklim stasiun Serang tahun 1999 sid tahun 2001. Parameter iklim yang digunakan analisis adalah suhu udara, kecepatan angin, kelembaban relatif (RH), dan lama penyinaran matahari. Proses pembelajaran model Jaringan syaraf tiruan penjalaran balik menggunakan input parameter iklim dan output ETp basil perhitungan model Penman. Data training dan test adalah ETp model Penman, parameter iklim tahun 1999, dan ETp, parameter iklim tahun 2000. Verifikasi digunakan ETp, parameter iklim tahun 2001, dengan indikator kesalahn Root Mean Squared Enos (RMSE) digunakan pula koefisien determinasi (R2).Hasil training dan test data menggunakan model jaringan syaraf tiruan penjalaran balik (backpropagation) menunjukkan bahwa data tahun 1999 dan 2000 merupakan data yang representatif dengan.nilai RMSE adalah 0,00056 dan R2 adalah 0,98, sehingga data tersebut dapat mewaldli data parameter iklim stasiun Serang. Verifilcasi dilakukan dengan cara membandingkan ETp harian tahun 2001 basil perhitungan model jaringan syaraf tiruan dengan ETp harian tahun 2001 basil perhitungan model Penman. Nilai RMSE ETp harian tahun 2001 model Jaringan syaraf tiruan dengan model Penman adalah 0,3262, sedangkan koefisien determinasi (R2) adalah 0,88. Nilai tersebut menunjukkan ETp model jaringan syaraf tiruan penjalaran balik (backpropagation) mempunyai nilai yang secara dengan ETp model Penman. Dengan demikian nilaipembobot (weight) basil pembelajaran model JST dapat digunakan untuk mengestimasi ETp stasiun Serang pada tahun-tahun berilannya maupun tahun-tahun yang lalu.
DESIGN OF ZERO RUNOFF SYSTEM AT IPB DARMAGA CAMPUS, BOGOR, WEST JAVA Muhammad Ihsan; Budi Indra Setiawan; Nora H Pandjaitan
Jurnal Teknik Sipil dan Lingkungan Vol. 1 No. 1: April 2016
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.324 KB) | DOI: 10.29244/jsil.1.1.1-10

Abstract

Bogor Agricultural University (IPB) Campus is an urban area that experienced flooding when heavy rain occurred, especially at Graha Widya Wisuda (GWW)’s parking lot, Kamper Street (FEMA), Meranti Street, and Tanjung Street. The drainage system of IPB campus is a conventional system. It drain surface runoff as fast as possible to the outlet. Zero Runoff System (ZROS) is one of technologies to minimize runoff using water storage. The advantages of ZROS are runoff minimization, local aquifer’s recharge, and damage mitigation on public facilities. This research aimed to design ZROS at IPB Campus that capable to minimize surface runoff. This research started by water catchment area (WCA) delineation, design rainfall and peak runoff analysis, infiltration rate measurement, and ZROS design calculation. Based on frequency analysis the design rainfall was 125.68 mm. Sub-sub-WCA 1-1C (3 locations), 1-1B, 2-1B, and 2-2A were the flooding’s location. Water pocket is the proposed technology to be applied in ZROS. To mitigate flooding, sub-sub-WCA 1-1B, 1-1C, 2-1B, and 2-2A needed 44 units of water pockets with length of 1.20 m (sub-sub-DTA 1-1B, 2-1B, dan 2-2A) and 1.60 m (sub-sub-DTA 1-1C),  with depth ranged from 2.41 m to 3.40 m. Keywords: drainage, flood, runoff, water balance, ZROS
ARTIFICIAL NEURAL NETWORK APPLICATION FOR THE ESTIMATION OF ANNUAL RAINFALL DATA UNRECORDED IN CISADANE WATERSHED Elhamida Rezkia Amien; Roh Santoso Budi Waspodo; Budi Indra Setiawan; Rudi Yanto
Jurnal Teknik Sipil dan Lingkungan Vol. 1 No. 1: April 2016
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (407.46 KB) | DOI: 10.29244/jsil.1.1.33-41

Abstract

Naturally in a watershed rainfall distributes spatially. To know rainfall in the watershed needs information from many installed rain gauges. However, rainfall data is found not completely recorded. It is then important to estimate missing or unrecorded  rainfall data. This study aims to estimate annual rainfall data in stations by using ANN (Artificial Neural Network). This study was conducted in Cisadane watershed. This study perfomed using rainfall data for 14  periods, the location of rainfall post (coordinates and elevation), DEM map, and watershed map. Data processing and analyzing performed using Ms. Excel 2010, ArcGIS 10.0, and BackPropogation Neural Network 1.0 program. Data used as input in ANN to estimates unrecorded rainfall data were coordinates (X,Y) and elevation (Z) of each rainfall post. ANN can be used to predict the amount of rainfall in cisadane watershed marked with a value of determination (R2) 0,97. After all data complete, average of rainfall in Cisadane watershed can be calculate using arithmetic, thiessen polygon, and isohyet. The amount of rainfall watershed in Cisadane using the arithmetic mean produce rainfall of 2.609 mm, with Thiessen Polygon of 2.539 mm, and with Isohyets of 2.594 mm. Keywords: ANN, annual rainfall, Cisadane watershed, estimation of rainfall 
Salinization Process on Sand Membrane as a Simulation of Sea Water Intrution and Tidal Flood Effect Akfia Rizka Kumala; Budi Indra Setiawan; Satyanto K Saptomo; Rudi Yanto
Jurnal Teknik Sipil dan Lingkungan Vol. 1 No. 1: April 2016
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (510.567 KB) | DOI: 10.29244/jsil.1.1.11-19

Abstract

 Salinization process through a membrane of sand is  presented in this paper. Two treatments were performed here. Treatment 1, saline water flowed continuously from below the membrane with a stable unsaturated water content depicted as a simulation of sea water intrusion. Treatment 2, the membrane was inundated with saline water depicted as a simulation of flooding. Two kinds of membrane used which were black and white sand. Black sand had saturated water content (θs) 0.35 cm3/cm3, and the white sand 0.52 cm3/cm3. The highest to the lowest evaporation rate were flooded black sand, unflooded black sand, flooded white sand, and unflooded white sand membranes. Flooded and unflooded black sand membrane had higher temperature than flooded and unflooded white sand membrane. Most salt crystals were produced by the not flooded membrane amounted to 14.7 gram and 15 gram.Keywords : salinization, sand membrane, saline water, evaporation
Prediction of Groundwater Storage in Gabus Wetan Subdistrict, Indramayu Regency, West Java Province, Indonesia Septian Fauzi Dwi Saputra; Roh Santoso Budi Waspodo; Budi Indra Setiawan
Jurnal Teknik Sipil dan Lingkungan Vol. 1 No. 3: Desember 2016
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3847.797 KB) | DOI: 10.29244/jsil.1.3.147-158

Abstract

Gabus Wetan Subdistrict, Indramayu Regency in West Java Province known as one of rice production center in Indonesia has common problem of surface irrigation water that is unavailable in dry season. It necessary to find alternative water source from groundwater to increase intensity as well as productivity. The aim of this study were to determine geoelectrical-hydrogeological profiles in form of distribution characteristics of the aquifer indicated by the resistivity of rocks and to predict the groundwater reserve potential in Gabus Wetan, Indramayu Regency. Resulted information can then be used to exploit groundwater for alternative supply of irrigation water. The result of this study shown that the rock resistivity in the area ranging between 1-30 Ωm. The rock aquifers consist of sandy clay, clayey sand, and sand. The shalllow groundwater (unconfined aquifer) are in the range of 3-40 meters below the soil surface having tickness of aquifer in the range of 7-20 meters. The deep groundwater (confined aquifer) can be estimated at the depth of more than 60 meters below the soil surface having tickness more than 40 meters. The hydraulic conductivity is estimated 20 m/day for unconfined aquifer and confined aquifer. The predicted groundwater storage of unconfined aquifer was about 31,687.2 m3/day or 0.37 m3/sec and confined aquifer 99,382.6 m3/day or 1.15 m3/sec.Keywords: aquifer,  groundwater, hydrogeology, hydraulic conductivity, resistivity
Pemetaan Topografi Calon Lokasi Embung di Kampus IPB Darmaga, Bogor Bagus Rahmansyah Priyoadi; Budi Indra Setiawan
Jurnal Teknik Sipil dan Lingkungan Vol. 5 No. 1: April 2020
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (526.743 KB) | DOI: 10.29244/jsil.5.1.51-58

Abstract

Before planning and designing a small dam, land’s topographic mapping and water flow pattern’s analysis are needed. The aim of this research were to identify the land use, water catchment areas, water flow pattern, and analyze land’s topographic condition, as well as producing topographic maps and calculating inundation volume at small dam location at IPB Campus Darmaga. This research was conducted in April - July 2019. The land use around the small dam location consisted of forests, roads, grasslands, bare land, settlements, and agriculture lands. The catchment area of the small dam location was divided into four area, with an area of 2881.0 m2, 4531.0 m2, 2790.0 m2, and 10917.3 m2 respectively. The highest and lowest elevations based on land measurements at small dam location were 199.71 masl and 187.23 masl. The topographic map was created using Surfer 13 software with the most appropriate interpolation method was natural neighbor. The direction of the surface water flow was relatively uniform and leads to the North and South. The minimum and maximum of inundation volume were 1.5 m3 and 13752.8 m3, and the optimum inundation volume was 2824.8 m3.
Desain Kolam Retensi Berbantu Komputer di Cibuluh Kota Bogor Muhammad Nor Mahmudi; Budi Indra Setiawan
Jurnal Teknik Sipil dan Lingkungan Vol. 5 No. 2: Agustus 2020
Publisher : Departemen Teknik Sipil dan Lingkungan, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jsil.5.2.115-124

Abstract

Water retention serves to control the surface runoff and conservation of rainwater in maintaining groundwater accumulation. This research aims to know the discharge of flood, know the volume of water to be accommodated in water retention, determine optimal water retention volume capacity, produce an effective design of water retention technical design, and produce a cost budget plan. Research conducted in Cibuluh Quarter, Tanah Baru Village, District Bogor Utara, Bogor City, West Java. Komulative flood discharge is 12.01 m3/sec. Capacity of Ciheuleut River is 9.38 m3/sec. Total capacity of water retention is 5272.52 m3. The Capacity development is 10481 m2. Water retention area that can be constructed is 4241 m2. The depth is 4 m so the capacity is 16964 m3. The structure is oval. The shortest diameter dimension is 50 m and the longest is 108 m. Total depth plan of 6 m is able to accommodate maximum 25446 m3 of water. Planned a type of sluice with width 1300 mm x height 1600 mm with a discharge of 4.89 m3/sec. It takes a total of 5 sluices on inlet and outlet. The cost required in the construction of Cibuluh Water Retention is Rp13.680.570.000,00.
Co-Authors - Nurfaijah - Reskiana - Rudiyanto - Wiranto Adlan Adlan Agus Sakawuna, Wandira Ahmad Fausan Ahmad Fausan Akfia Rizka Kumala Akfia Rizka Kumala, Akfia Rizka Aldi , Kukuh Allen Kurniawan Amalia Nurul Huda Amalia, Regina Anna Farida Ardiansyah -- -- Ari Sugiarto Arief Sabdo Yuwono Arief Sabdo Yuwono Armanto, Muhammad Edi Bagus Rahmansyah Priyoadi Bakri Bakri Bakri Bakri Budiman Minasny Budy Wiryawan Chusnul Arif Deka Trisnadi Munarso Drajat Martianto Edi Susanto Eka Sulaecha Elhamida Rezkia Amien Elokpere, Immanuel Nauk Enan Mulyana Adiwilaga Endang Gunawan Erfiana, Eka Erizal , Fachruddin Fachruddin Fachruddin, Fachruddin Fadli Irsyad Hadi Susilo Arifin Hanhan Ahmad Sofiyuddin Hanhan Ahmad Sofiyuddin Haris, Abdul Hermantoro . Heru Anggara Hidayat Pawitan Hideki Furuya I Dewa Made Subrata Immanuel Nauk Elokpere Joice Ester Manihuruk Joko Sumarsono Kamarudin Abdulah Kazutoshi Osawa Khusnita Azizah Kukuh Aldi Kunihiko Yoshino Leopold O. Nelwan Lilik B. Prasetyo LILIK BUDIPRASETYO Lismining Pujiyani Astuti Liyantono Liyantono . Lolly M. Martief Luthfi Riady M. Yanuar J. Purwanto Manihuruk, Joice Ester Marimin , Martianto D Martianto D Martianto D, Martianto D Masaru Mizoguchi Masaru Mizoguchi Matsuda, Hiroshi Meiske Widyarti Meiske Widyarti Moch Ridwan Widiansyah Momon Sodik Imanuddin Muh. Sakti Muhammadiah Muh. Taufik Muhamad Askari Muhamad Askari Muhammad Didik Nugraha Muhammad Edi Armanto Muhammad Ihsan Muhammad Ihsan Muhammad Nor Mahmudi Muhammad Nor Mahmudi Muhammad Yanuar J. Purwanto Mustafril . Mustafril Mustafril Mustafril Mustafril Mustafril Mustafril Mustafril, Mustafril Nana Mulyana Arifjaya Nanda Nashiha Ihsani Naresworo Nugroho Niken Tanjung Murti Pratiwi Nora H. Pandjaitan NP, Ratmini S Nur Aini Iswati Hasanah Nur Aini Iswati Hasanah Nur Aini Iswati Hasanah Nurfaijah Nurfaijah Nurwahid Dimas Saputro Oktari Ega P. Perdinan Popi Redjekiningrum Dwi Mustatiningsih Popi Rejekiningrum Pradha Wihandi Sinarmata Prasetyo LB Prasetyo LB, Prasetyo LB,, Prasetyo LB Prastowo Prastowo Prastowo, Prastowo Priyoadi, Bagus Rahmansyah Purwanto MYJ Purwanto MYJ Purwanto MYJ, Purwanto MYJ Rahmat Isnain Ramadan, Risky Ratmini S NP Riani Muharomah Riani Muharomah Riani Muharomah Risky Ramadan Roh Santoso B. Waspodo Roh Santoso Budi Waspodo Rosmina Zuchri, Rosmina Rudi Yanto Rudi Yanto, Rudi rudiyanto Rudiyanto . Rudiyanto Rudiyanto Rusianto Saputra, Septian Fauzi Dwi Satyanto Krido Saptomo Septian Fauzi Dwi Saputra Slamet Suprayogi Slamet Suprayogi Slamet Widodo Slamet Widodo Soewarso Soewarso Sri Wahjuni Suhardi . Sulaecha, Eka Suroso Suroso Suroso Suwardi Suwardi Suwardi Suwardi Syafriyandi, Debby Tamrin Tamura, Koremasa Tarissa Kristina Teuku Devan Assiddiqi Tri Julianto, Baskoro Umi Hanifah Vita Ayu Kusuma Dewi Widiansyah, Moch Ridwan Willy Bayuardi Suwarno Wiranto . Yanto Surdianto Yanuar Chandra Wirasembada Yanuar Chandra Wirasembada Yazid Ismi Intara Yudi Chadirin Yuli Suharnoto