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All Journal MANAJEMEN HUTAN TROPIKA Journal of Tropical Forest Management Jurnal Ilmu Pertanian Indonesia Jurnal Ilmu dan Teknologi Kelautan Tropis Forum Pasca Sarjana Jurnal Keteknikan Pertanian Jurnal Penelitian Pengelolaan Daerah Aliran Sungai Jurnal Tanah dan Iklim Aceh International Journal of Science and Technology
Hidayat Pawitan
Bogor Agricultural University, Darmaga Campuss, Bogor
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Library & Information Science

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STUDY OF SHORELINE CHANGES AT JENEBERANG RIVER DELTA, MAKASSAR Sakka Sakka; Mulia Purba; I Wayan Nurjaya; Hidayat Pawitan; Vincentius P. Siregar
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 3 No. 2 (2011): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (568.813 KB) | DOI: 10.29244/jitkt.v3i2.7826

Abstract

The study of shoreline changes during 1990 - 2008 in the delta of the River Jeneberang, Makassar was conducted by evaluating sediment transport into and out of a cell. Longshore sediment transport was computed by considering the influence of heights and angles of the breaking waves. Results of calculation of sediment transport showed that the dominant of sediment transport was to the north during the arrival of the southwest and west waves, and to the south when the wave coming from the northwest. Comparison between shore profiles resulting from model and coastline satellite imagery showed similarity. The difference between the two tend to be occurred at the head land part of the shoreline. This was due to complexity of coastal dynamic at the area. The results of the 19 years shoreline simulation showed that there was a tendency of abrasion at the upsteam head land part as the wave energy tend to converge and accretion at the bay part as the wave energy tend to diverge. Abrasion mainly occurred at Tanjung Bunga (head land) where the coast retreat 181.1 m. Accretion occur in the bay area (Tanjung Merdeka) where the coast advance to the sea for about 59.8 m. The shoreline tend to be stable when the profile was straight such as Barombong Coast.Keywords: abrasion, accretion, sediment transport, shoreline changes.
Kinerja Hidrolika Sistem Fertigasi Mikro Naswir .; Soedodo Hardjoamidjojo; Nora H. Pandjaitan; Hidayat Pawitan
Jurnal Keteknikan Pertanian Vol. 22 No. 1 (2008): Jurnal Keteknikan Pertanian
Publisher : PERTETA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1778.528 KB) | DOI: 10.19028/jtep.022.1.%p

Abstract

A micro fertigation system was designed using local components, simple and easy to build, operate and repair by farmers. Evaluation of hydraulic performances consists oflong-path size in emitters, relationship between discharge and head in emitter, head loss along the lateral, and emission uniformity. The result of the research indicated that the micro fertigation system with 0,5 mm inside diameter micro-tubing used to control the flow from outlets along laterals. The individual microtube was 0,6 m long and spaced at 0,3 m interval along laterals. The discharge was adjusted by stop valves and ranges from 0,48 -2, 74 ltrs/h at operating heads of 0,2-1,5 m. The emission exponent, x was 0,86, and the head-discharge equation was Qe= 1,94 H0,86. The coefficient of manufacturing variation, CV was 0,043 from 125 samples of emitters, and an interpretation of values was excellent. Accordingly allowable length of lateral (at operation head, H = 1 m) 15 meters of length PVC hose ¼ inch size was acceptable and 25 meters of length PVC hose 5/16 inch size was acceptable. The design of micro fertigation system have emission uniformity, EU > 85% far all treatments.  Keywords: micro fertigatian system, hydraulic performance, emission exponent, head loss, emission uniformity Diterima: 6 Agustus 2007; Disetujui: 12 Nopember 2007
Detecting Tidal Flood Pattern with Landsat TM Remote Sensing Data in South Sumatra Coastal Area KUSUMO NUGROHO; U.S WIRADISASTRA; S. ARSYAD; HIDAYAT PAWITAN; . SUDARSONO
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 25 (2007): Juli 2007
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n25.2007.%p

Abstract

Detecting the availability of sufficient water in tidal land management is important for agriculture. Tidal flood pattern provides an information of area where has tidal flood as well as drought by time and places. The objectives of this research are 1) to study the tidal flood spatial pattern by using real time data and digital data image processing, 2) to determine a tidal flood classification based on ground water level on a specific locationand time, and 3) to study the hydrological factors affecting the flood. The tidal flood pattern can be classified within a block by their ground water fluctuation. The visual analysis with four image of different time, gives a clear differences between tidal flood pattern change and tidal fluctuation. The classification on the moist Landsat TM image after a Tesseled Cap transformation can produce classified image with similar flooded condition with the same range of ground water level. After the test, the tidalflooded pattern was found similar with the classification results. The tidal flood pattern is also recognized having a specific relationship with land use or land utilization type. The land use and land management affect the pattern. The application of geographical information system, especially remote sensing digital image data analysis, will help in determining tidal flood pattern as well as the ground water spatial pattern.
Characterization and Resilience of Upland Degraded Soils of Central Kalimantan M ANANG FIRMANSYAH; . SUDARSONO; HIDAYAT PAWITAN; S DJUNIWATI; G DJAJAKIRANA
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 27 (2008): Juli 2008
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n27.2008.%p

Abstract

In relation to land management and sustainable environment quality, soil degradation is considered as important issue. Soil degradation could be appropriately overcome when the characteristics of restoration or its resilience are recognized. The main purpose of this research is to characterize and classify upland degraded soils in Central Kalimantan based on land quality (LQ) that determine land suitability classification within landutilization type (LUT). The parameters of LQ involve water availability (w), nutrient availability (n), Al toxicity (t), soil resistance to erosion (e), and antropogenic soil deterioration (d). While, for LUT, there are several types i.e. rice; rice-rice-soybean; rubber; and oil palm within three patterns A, B, C. The other purpose is to characterize and classify degraded soils and soilresilience based on land index and land suitability classification. The parametric reffering to land index taken from production of commodity estimation within each LUT based on land quality is used to classify land suitability. Research result shows that Alfisols has the highest soil capability. It is indicated by land index that is higher than the other soils. The main indicators of soil degradation and resilience involve LQ of nutrient availability, water availability, and Al toxicity. The high soil potency does notshow the ability of resilience. On the other hand, the low soil potency cannot be able to keep sensitivity of degradation. The resistency of soils at study area is relatively high. Generally, degraded agricultural land region is difficult to be conserve through natural revegetation period known as bare land. Both natural and antropogenic resilience are not quite different atupland soils in Central Kalimantan. Soil taxa cannot reflect the difference of degrada
Use of AGNPS Model to Estimate Watershed Scaled Erosion NONO SUTRISNO; S. ARSYAD; HIDAYAT PAWITAN; K. MURTILAKSONO
Jurnal Tanah dan Iklim (Indonesian Soil and Climate Journal) No 20 (2002): Desember 2002
Publisher : Balai Besar Penelitian dan Pengembangan Sumberdaya Lahan Pertanian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21082/jti.v0n20.2002.%p

Abstract

Method of watershed scaled erosion prediction is different from plot scale erosion prediction. The objective of this study was to predict watershed scaled erosion by measuring sediment yield and using Agricultural Non-Point Source Pollution (AGNPS) model. The plot scale experiment was set in randomized block design with 7 treatments i.e combination of ridges and raised beds. In the experiment, surface erosion was measured with soil pan method, watershed scale erosion (sediment yield) by sampling at the outlet. The method of watershed scale prediction were using AGNPS model. The result shows that AGNPS model was applicable to predict Tugu Utara sub watershed erosion (sediment yield) and simulate its land use management. The simulation of AGNPS model, with crop factor of 0.18 and slope length 5 m significantly reduced watershed erosion. This implies that AGNPS model is reliable to predict Tugu Utara sub watershed erosion and the model proves that watershed erosion is different from plot scale erosion.
KARAKTERISTIK HIDROLOGI DAN DAMPAKNYA TERHADAP BANJIR DAERAH ALIRAN SUNGAI JAMBO AYE DI ACEH INDONESIA (Hydrological Characteristics And Its Impact On Flood Jambo Aye Basin In Aceh Indonesia) Cut Azizah; Hidayat Pawitan; Nuraida Nuraida; Halus Satriawan; Rahmat Abbas; Sarif Robo; Misnawati Misnawati
Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Management Research) Vol 5, No 2 (2021): Jurnal Penelitian Pengelolaan Daerah Aliran Sungai (Journal of Watershed Managem
Publisher : Center for Implementation of Standards for Environmental and Forestry Instruments Solo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20886/jppdas.2021.5.2.171-184

Abstract

ABSTRACT The increase in damage are experienced by many watershed due to human interactions and interventions which impacted in the hydrological balance that may lead to disasters. Flooding is a routine hydrological disaster that occurs in the Jambo Aye Basin. This study aims to analyze the relationship of the hydrological characteristics of the Jambo Aye Basin to the potential and occurrence of floods. Characteristics of slope, soil movement, hydrological soil group (HSG) analysis, antecedent precipitation index (API) and runoff curves are used as hydrological indicators to identify potential flooding in the watershed. The analysis show that the Jambo Aye Basin is proned to flooding. The potential for inundation floods is found in the downstream area which has the characteristics of gentle slopes (12%), very low infiltration capacity (37,95%), high runoff curve values (17%) and high levels of wetness (26%). Flash floods have the potential to occur in the upstream area which has the characteristics of steep slopes, soil movement and high rainfall. Integrated watershed management needs to be carried out in the Jambo Aye Basin considering the frequent occurrence of floods. Keywords: antecedent precipitation index; flash floods; flood; curve numbers; land use ABSTRAKDaerah Aliran Sungai (DAS) mengalami peningkatan kerusakan akibat hubungan dan interferensi manusia yang berdampak pada kesetimbangan hidrologi sehingga terjadi bencana. Bencana banjir yang merupakan bencana hidrologi rutin terjadi di DAS Jambo Aye. Penelitian ini bertujuan untuk menganalisa hubungan karakteristik hidrologi DAS Jambo Aye terhadap potensi dan kejadian banjir di wilayah DAS Jambo Aye. Karakeristik kemiringan lereng, pergerakan tanah, analisis kelompok hidrologi tanah (HSG), Antecedent Precipitation Index (API) dan kurva limpasan digunakan sebagai indikator hidrologi untuk mengidentifikasi potensi banjir yang terjadi di DAS Jambo Aye. Analisis menunjukkan DAS Jambo Aye termasuk wilayah yang berpotensi mengalami banjir. Potensi banjir genangan terdapat di wilayah hilir yang mempunyai karakteristik lereng landai (12%), kapasitas infiltrasi sangat lambat (37,95%), nilai kurva limpasan tinggi (17%) dan tingkat kebasahan yang tinggi (26%). Banjir bandang berpotensi terjadi di wilayah hulu yang mempunyai karakteristik lereng curam, adanya pergerakan tanah dan curah hujan yang tinggi. Pengelolaan DAS perlu dilakukan di DAS Jambo Aye mengingat kejadian banjir yang sering terjadi. Kata kunci: antecedent precipitation index; banjir bandang; banjir; curve number; penggunaan lahan
Water Footprint Analysis In Krueng Aceh Watershed, Aceh Province, Indonesia Purwana Satriyo; Hidayat Pawitan; Yanuar J Purwanto; Yayat Hidayat
Aceh International Journal of Science and Technology Vol 6, No 3 (2017): December 2017
Publisher : Graduate Program of Syiah Kuala University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (586.617 KB) | DOI: 10.13170/aijst.6.3.8655

Abstract

Water is one the most important natural resources to maintain human life and all other living things in the earth. Around 65% water were consumed for drinking purpose, while others were used for daily needs. The increasing amount of work on water use and scarcity in relation to consumption and trade has led to the emergence of the field of Water Footprint (WF). Climate change, rural development, world population growth and industrialization have placed considerable stress on the local availability of water resources. Thus, it is necessary to perform study in order to analyze water demands and supply for sustainable water availability. Recently, water footprint analysis has been widely draw attention to the scientists and engineers. The water footprint analysis is closely related with virtual water from which it is defined as total water volume used for consumption and trade. The main aim of this present study is to analyze and assess the total water requirement based on community water footprint in Krueng Aceh watershed area. The virtual water used in this study are dominant consumption food commodities. The result shows that water footprint per capita in Krueng Aceh watershed area was 674.52 m3/year. Water footprint for rural and urban population were 608.27 m3/year and 740.77 m3/year respectively. The WF of food consumption in urban area of Krueng Aceh watershed is 690.74 m3 / capita / year and 584.22 m3/capita/year or average 625.69 m3/capita/year, while for non-food, the WF per capita is 24.05 m3/year in rural or 32.46% of the total water footprint. Non-food consumption per capita in Krueng Aceh and in urban areas is 50.03 m3/year or 67.53%. The total water demand based on the water footprint is 378,906,655.05 m3 in 2015 which is consumed by most of residents in the Krueng Aceh watershed area. Furthermore, total WF in rural and urban area are 193,489,128.95 m3 and 185,417,526.10 m3 respectively.
Co-Authors . Soedarsono Abbas, Rahmat ABDUL RAUF Anak Agung Gede Sugianthara Budi Indra Setiawan Cut Azizah G DJAJAKIRANA G. Gravenhorst Gatot Irianto H. Soewardjo Halus Satriawan I Nengah Surati Jaya I Wayan Nurjaya K. MURTILAKSONO Kukuh Murtilaksono Kusumo Nugroho Laksono Trisnantoro M ANANG FIRMANSYAH M. Yanuar J. Purwanto Misnawati Misnawati Moch. Anwar Mulia Purba Naik Sinukaban Naswir . Ngudiantoro . Nono Sutrisno Nora H. Pandjaitan Nuraida Nuraida Purwana Satriyo Robiyanto H. Susanto Roh Santoso B. Waspodo S Djuniwati S. Arsyad Saiful Akhyar Lubis Sakka Sakka Sarif Robo Soedodo Hardjoamidjojo Sudarsono Suhardi . Suria Darma Tarigan Tania June Trihono Kadri U.S WIRADISASTRA Vincentius P Siregar