Penentuan Metode Intensitas Hujan Berdasarkan Karakteristik Hujan dari Stasiun Pengamat Hujan Disekitar Kecamatan Karawang Timur

2019 ◽  
Vol 5 (1) ◽  
Author(s):  
Melisa Permatasari ◽  
M. Candra Nugraha ◽  
Etih Hartati
Keyword(s):  
Drainage System ◽  
Daily Rainfall ◽  
Intensity Analysis ◽  
Rain Intensity ◽  
Rainy Period ◽  
Discharge Plan ◽  
Calculation Results ◽  
Value Determination ◽  
Maximum Daily Rainfall ◽  
Method Approach

<p>The rain intensity is the high rainfall in unit of time. The length of rain will be reversed by the amount rain intensity. The shorter time the rain lasts, the greater of the intensity and re-period of its rain. The value of rain intensity is required to calculate the flood discharge plan on the drainage system planning area in East Karawang district. Determining the value rain intensity is required the maximum daily rainfall data obtained from the main observer stations in the Plawad station planning area. The method of determination rain intensity analysis can be done with three methods: Van Breen, Bell Tanimoto and Hasper der Weduwen. Selected method is based on the smallest deviation value. Determination deviation value is determined by comparing rain intensity value of Van Breen method, Bell Tanimoto, Hasper der Weduwen. By comparing rain intensity value of the Van Breen method, Bell Tanimoto, Hasper der Weduwen with the results of calculating three methods through the method approach Talbot, Sherman and Ishiguro. Calculation results show that the method of rain has smallest deviation standard is method Van Breen with Talbot approach for rainy period (PUH) 2, 5, 10, 25, 50 and 100 years.</p>

scholarly journals FLOOD MODELLING OF BADENG RIVER USING HEC-RAS IN SINGOJURUH SUB DISTRICT, BANYUWANGI REGENCY, EAST JAVA, INDONESIA

2021 ◽  
Vol 13 (1) ◽  
pp. 76
Author(s):  
Syamsul Bachri ◽  
Yulius Eka Aldianto ◽  
Sumarmi Sumarmi ◽  
Kresno Sastro Bangun Utomo ◽  
Mohammad Naufal Fathoni
Keyword(s):  
Local Community ◽  
Agricultural Land ◽  
Daily Rainfall ◽  
Flood Hazards ◽  
Economic Sectors ◽  
Discharge Plan ◽  
The Future ◽  
Inundation Modelling ◽  
Detrimental Impact ◽  
Maximum Daily Rainfall

The flood disaster is a severe threat in Indonesia due to the enormous impacts on environmental degradation, social and economic sectors. One flood event due to the overflow is the Badeng River's flooding in 2018 at Singojuruh Subdistrict, Banyuwangi Regency. The flood had a detrimental impact on the local community, especially on agricultural land and residential. Anticipatory steps need to be taken to minimize losses due to flooding in the future. Inundation modelling in this research is purposed to predict flood hazards. Hence it can have appropriate anticipatory steps in the future. The software used to model the inundation in this study was the HEC-RAS Program. Data needed in this study are river geometry, manning coefficient, and maximum daily rainfall from the year 2010 until 2019. The research e stages in this study consist of (1) Calculation of watershed morphometry, (2) Calculation of average regional rainfall, (3) Calculation of rainfall plan, (4) Rain Data Suitability Test, (5) Calculation of Rain Intensity, (6) Calculation of Flood Discharge Plan, (7) Geometry Modelling, (8) Extraction of Manning Coefficient, and (9) Inundation Simulation. The results of the Gama 1 method's peak discharge plan showed an increase in each return period. The area with the highest level of susceptibility around the Badeng River occurs in Alasmalang Village, Singojuruh Subdistrict. This area has the smallest river storage capacity than other river crossings. Hence it has the most significant potential for flooding.Keywords: inundation modelling, flood, HEC-RAS, Badeng RiverBencana banjir menjadi ancaman serius bagi negara Indonesia karena memberikan dampak yang besar terhadap kerusakan lingkungan, sosial maupun ekonomi. Salah satu kejadiannya adalah banjir yang terjadi akibat luapan sungai Badeng pada tahun 2018 di Kecamatan Singojuruh, Kabupaten Banyuwangi. Kejadian Banjir tersebut memberikan dampak yang merugikan bagi masyarakat setempat, terutama pada lahan pertanian dan permukiman. Langkah antisipasi perlu dilakukan untuk meminimalisir kerugian akibat bencana banjir di masa mendatang. Pemodelan genangan dalam penelitian ini dibuat bertujuan untuk  memprediksi bahaya banjir, sehingga dapat dilakukan langkah antisipasi yang tepat. Software yang digunakan untuk memodelkan genangan dalam penelitian ini adalah Program HEC-RAS. Data yang dibutuhkan berupa data geometri sungai, koefisien manning dan curah hujan harian maksimum selama periode tahun 2010 sampai 2019. Beberapa tahapan dalam penelitian ini meliputi (1) Perhitungan morfometri DAS, (2) Perhitungan hujan rerata wilayah, (3) Perhitungan curah hujan rencana, (4) Uji Kesesuaian Data Hujan, (5) Perhitungan Intensitas Hujan, (6) Perhitungan Debit banjir rencana, (7) Pemodelan geometri, (8) Ekstraksi angka kekasaran manning, dan (9) Simulasi Genangan. Hasil perhitungan debit puncak rencana metode Gama 1 menunjukkan peningkatan pada setiap periode ulang. Daerah yang mempunyai tingkat kerawanan paling besar adalah areal sekitar Sungai Badeng yang berada di Desa Alasmalang Kecamatan Singojuruh. Daerah ini memiliki kapasitas tampung sungai yang paling kecil daripada penampang sungai yang lainnya, sehingga memiliki potensi terjadinya banjir paling besar. Kata kunci: pemodelan genangan, banjir, HEC-RAS, Sungai Badeng

scholarly journals Analisis Debit Puncak untuk Perencanaan Sistem Drainase di Kawasan Teknopark Pelalawan

2019 ◽  
Vol 20 (2) ◽  
pp. 281
Author(s):  
Robertus Haryoto Indriatmoko
Keyword(s):  
System Analysis ◽  
Drainage System ◽  
Daily Rainfall ◽  
Main Channel ◽  
Peak Discharge ◽  
Planning Period ◽  
Channel System ◽  
Mapping Process ◽  
Drainage Capacity ◽  
Maximum Daily Rainfall

ABSTRACTA drainage system is an infrastructure that plays an important role for regions such as in Pelalawan technopark. Drainage system design needs to be carried out comprehensively to obtain the results of the predicted regional channel system analysis based on maximum daily rainfall data in the area. Thus, any rain falling in each sub-watershed within the region can be properly flowed, through the channel system in the four main drainages and does not cause flooding in the area. The methodology for the analysis of drainage systems is carried out through 4 comprehensive stages, starting with delineation of the four sub-watersheds in the area and performing sub-watershed morphometry until mapping process of the main drainage system of the Pelalawan technopark area. The results of peak discharge analysis is derived from the calculation of rain plan/predicted rain results in the 25-year return period, the Petarik sub-watershed has value of 158.21 m3/sec, while the Bedaguh Guntung watershed,  the Kahayan sub-watershed, and the Langgam watershed have results about 53.64 m3/dt, 30.56 m3/sec, and 34.16 m3/sec respectively. If the drainage system is to be built in the Technopark area, one main channel must be provided in each sub-watershed with channel capacity by the peak discharge. If the four main channels have been prepared, the Technopark Region will be free of flooding for the planning period from the rain with a 25 year return period.Keyword: Technopark, infiltration, rainfall, return periode, peak discharge, drainage capacity ABSTRAKRancangan sistem  drainase adalah sebuah infrastruktur yang memegang peranan penting termasuk untuk kawasan seperti di teknopark Pelalawan. Perencanaan sistem drainase perlu dilaksanakan dengan baik untuk mendapatkan hasil analisis sistem saluran kawasan yang diprediksi berdasarkan data  hujan hujan harian maksimum dalam kawasan tersebut.  Dengan demikian, setiap hujan  yang jatuh di dalam setiap sub DAS dalam kawasan dapat dialirkan dengan baik, melalui sistem saluran pada keempat drainase utama dan tidak menimbulkan banjir dalam kawasan. Metodologi untuk analisis sistem  drainase, dilakukan melalui 4 tahap yaitu yang dimulai dengan melakukan deliniasi terhadap keempat sub DAS dalam kawasan dan melakukan morfometri sub DAS untuk mendapatkan data luas dari masing-masing sub DAS, kemiringan lereng, koefisien runoff, dan time of consentration (tc). hingga pemetaan sistem drainase utama  kawasan teknopark Pelalawan. Hasil analisis  debit puncak  pada 4 sub DAS  dalam kawasan teknopark yang berasal dari perhitungan hujan rencana/ hujan hasil prediksi pada periode ulang 25 tahun, untuk ke 4 adalah Sub DAS Petarik sebesar 158,21 m3/dt, sub DAS Bedaguh Guntung sebesar 53,64  m3/dt. Sub DAS Kahayan sebesar  30,56 m3/dt  dan  Sub DAS Langgam sebesar 34,16 m3/dt. Apabila dalam kawasan Teknopark tersebut akan dibangun sistem drainase, maka harus disediakan 1 (satu) buah saluran utama di setiap  Sub DAS dengan kapasitas saluran sesuai dengan besarnya sesuai dengan debit puncak. Jika keempat saluran utama tersebut telah disiapkan maka Kawasan Teknopark akan dapat terbebas dari banjir untuk periode perencanaan dari hujan dengan periode ulang 25 tahun.Kata kunci: Teknopark, infiltrasi, hujan, periode ulang, debit puncak, kapasitas saluran

scholarly journals Analisis Hidrologi untuk Penentuan Metode Intensitas Hujan di Wilayah Kecamatan Bogor Barat, Kota Bogor

2020 ◽  
Vol 5 (2) ◽  
Author(s):  
Siti Amalia Fajriyah ◽  
Eka Wardhani
Keyword(s):  
Standard Deviation ◽  
Statistical Method ◽  
Daily Rainfall ◽  
Selection Method ◽  
Drainage Channel ◽  
Rain Intensity ◽  
Maximum Daily Rainfall

<p>Rain intensity is defined as the rainfall falls in per unit time, expressed in mm/hours. Rain determined to get the discharge flood plans in sub-districts west Bogor, Bogor. Discharge flood plan needed to take into account the drainage channel would be designed again in districts west Bogor having problems. The study aimed to determine the intensity of rainfall in west Bogor as the basic determination of the drainage channel in west Bogor. Research carried out by changing the maximum daily rainfall to rain intensity. Methods used the method Bell Tanimoto, Van Breen, and Hasper Der Weduwen which is a statistical method and produce the intensity of rain. The amount of rain obtained will be substituted into formula Talbot, Sherman, and Ishiguro, and then compared to the early rain intensity. The selection method determined based on the value of the smallest standard deviation. The result of this study showed that the method chosen to determine the intensity of rain is Van Breen Method with Talbot Formula. </p>

scholarly journals SPATIALIZATION OF THE ANNUAL MAXIMUM DAILY RAINFALL IN SOUTHEASTERN BRAZIL

2019 ◽  
Vol 39 (1) ◽  
pp. 97-109
Author(s):  
Marcelo L. Batista ◽  
Gilberto Coelho ◽  
Carlos R. de Mello ◽  
Marcelo S. de Oliveira
Keyword(s):  
Daily Rainfall ◽  
Southeastern Brazil ◽  
Annual Maximum ◽  
Annual Maximum Daily Rainfall ◽  
Maximum Daily Rainfall

scholarly journals SIDOARJO MUD DRAINAGE SYSTEM

CI-TECH ◽  
2020 ◽  
Vol 1 (01) ◽  
pp. 31-37
Author(s):  
Achmad Baydhowi ◽  
Soebagio
Keyword(s):  
Drainage System ◽  
Soil Condition ◽  
Drainage Channel ◽  
The South ◽  
The West ◽  
South Side ◽  
Flood Discharge ◽  
Discharge Plan ◽  
Embankment Height

Sidoarjo or Lusi mud has an area of ​​640 ha and an average embankment height of 10 meters and submerges three sub-districts, namely Porong District, Jabon District and Tanggulangin District. In 2018, the Sidoarjo mud embankment has decreased or subsided by up to 8.5 meters at several points, which was caused by the condition of the embankment which was almost full and caused the soil condition of the embankment to become unstable. For this problem, it is necessary to build a drainage channel at the edge of the embankment to overcome the overflow of the embankment and flow it to the Porong river which is on the south side of the Sidoarjo mud embankment. From the calculation of the planned rain discharge, it is found that R2 = 72.95 mm after the planned rainfall is obtained, then the next is to look for the flood discharge plan which then plans the dimensions of the channel on the west and east sides of the embankment after obtaining the dimensions of the channel, then the next is planning the resistance pond and draining it to the porong river. with Siphon Network Pipe

scholarly journals ANALISIS TINGGI MUKA AIR BANJIR DAS BELAWAN DENGAN MENGGUNAKAN SOFTWARE HECRAS

2018 ◽  
Vol 7 (1) ◽  
pp. 26-29
Author(s):  
Asril Zevri
Keyword(s):  
Water Level ◽  
Cross Section ◽  
Return Period ◽  
Industrial Development ◽  
Daily Rainfall ◽  
Flood Water ◽  
Flood Discharge ◽  
Flood Level ◽  
Maximum Daily Rainfall ◽  
River Cross Section

Abstract: Belawan River Basin is one of the watershed, which currently change the land use because of the increasing population and industrial development. Rainfall with high intensity can cause rapid runoff, causing flood around the plains of the river cross section. The purpose of this research is to determine the flood water level of Belawan Watershed and flood discharge return period. Scope of activity in this research is analyzing daily rainfall Belawan watershed with the flood-discharge return period. Scope of activity in this research is analyzing maximum daily rainfall Belawan Watershed, and simulating flood water level with HECRAS. The result of the study shows that the potency of Belawan watershed flood water level is caused by flood discharge at 25 to 100 years especially in the middle to downstream of river cross section that is between 0.7 m and 3.3 m. Keywords: Flood Discharge, Flood Level, Belawan Watershed, Software HECRAS. Abstrak: Daerah Aliran Sungai Belawan adalah salah satu DAS yang pada saat ini mengalami perubahan tata guna lahan seiring bertambahnya jumlah penduduk dan perkembangan industri. Curah hujan yang tinggi dapat mengakibatkan limpasan sehingga menimbulkan tinggi muka air banjir di sekitar dataran penampang sungai. Tujuan dari penelitian ini adalah untuk mensimulasi tinggi muka air banjir DAS Belawan dengan debit banjir periode kala ulangnya. Lingkup kegiatan dalam penelitian ini yaitu menganalisa curah hujan harian maksimum rata-rata DAS Belawan dan menganalisa debit banjir kala ulang 2 sampai dengan 100 tahun, mensimulasi tinggi muka air banjir dengan HECRAS. Hasil studi menunjukan potensi tinggi muka air banjir DAS Belawan terjadi akibat debit banjir periode kala ulang 25 sampai dengan 100 tahun khususnya  di bagian tengah sampai hilir penampang sungai yaitu berkisar antara 0.7 m sampai dengan 3.3 m. Kata kunci: Debit banjir, Tinggi Banjir, DAS Belawan, Software HECRAS.

COSMIC RADIATION EXPOSURE CALCULATIONS FOR INTERNATIONAL AND DOMESTIC FLIGHTS DEPARTS FROM ISTANBUL AND ANKARA

2020 ◽  
Vol 192 (1) ◽  
pp. 61-68
Author(s):  
L Amon Susam ◽  
H Yilmaz Alan ◽  
A Yilmaz ◽  
A Erol ◽  
C I Inci ◽  
...  
Keyword(s):  
Mathematical Method ◽  
Radiation Exposure ◽  
Cosmic Radiation ◽  
Radiation Doses ◽  
Flight Duration ◽  
Software Program ◽  
Calculation Results ◽  
Method Approach

Abstract In this study, cosmic radiation doses were calculated for domestic and international flights departing from Istanbul and furthermore for domestic flights departing from Ankara using a software program called CARI-7A and also a mathematical method approach. Main parameters for calculating cosmic radiation are vertical cut-off rigidity, flight duration, latitude–longitude and altitude of the flight. Our calculation results agree with the measurements for domestic and international flights departing from Istanbul and Ankara.

scholarly journals Maximum daily rainfall in South Korea

2007 ◽  
Vol 116 (4) ◽  
pp. 311-320 ◽  
Author(s):  
Saralees Nadarajah ◽  
Dongseok Choi
Keyword(s):  
South Korea ◽  
Daily Rainfall ◽  
Maximum Daily Rainfall

scholarly journals Parameterization of a bucket model for soil-vegetation-atmosphere modeling under seasonal climatic regimes

2011 ◽  
Vol 15 (12) ◽  
pp. 3877-3893 ◽  
Author(s):  
N. Romano ◽  
M. Palladino ◽  
G. B. Chirico
Keyword(s):  
Soil Moisture ◽  
Soil Water ◽  
Seasonal Variations ◽  
Rainfall Variability ◽  
Daily Rainfall ◽  
Field Capacity ◽  
Richards Equation ◽  
Precipitation Regime ◽  
Water Balance Components ◽  
Rainy Period

Abstract. We investigate the potential impact of accounting for seasonal variations in the climatic forcing and using different methods to parameterize the soil water content at field capacity on the water balance components computed by a bucket model (BM). The single-layer BM of Guswa et al. (2002) is employed, whereas the Richards equation (RE) based Soil Water Atmosphere Plant (SWAP) model is used as a benchmark model. The results are analyzed for two differently-textured soils and for some synthetic runs under real-like seasonal weather conditions, using stochastically-generated daily rainfall data for a period of 100 years. Since transient soil-moisture dynamics and climatic seasonality play a key role in certain zones of the World, such as in Mediterranean land areas, a specific feature of this study is to test the prediction capability of the bucket model under a condition where seasonal variations in rainfall are not in phase with the variations in plant transpiration. Reference is made to a hydrologic year in which we have a rainy period (starting 1 November and lasting 151 days) where vegetation is basically assumed in a dormant stage, followed by a drier and rainless period with a vegetation regrowth phase. Better agreement between BM and RE-SWAP intercomparison results are obtained when BM is parameterized by a field capacity value determined through the drainage method proposed by Romano and Santini (2002). Depending on the vegetation regrowth or dormant seasons, rainfall variability within a season results in transpiration regimes and soil moisture fluctuations with distinctive features. During the vegetation regrowth season, transpiration exerts a key control on soil water budget with respect to rainfall. During the dormant season of vegetation, the precipitation regime becomes an important climate forcing. Simulations also highlight the occurrence of bimodality in the probability distribution of soil moisture during the season when plants are dormant, reflecting that soil, it being of coarser or finer texture, can be preferentially in either wetter or drier states over this period.

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