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ITS » PhD Theses » Program Doktoral Teknik Sipil
Posted by dee@its.ac.id at 02/11/2011 11:37:49  •  317 Views

MODEL DISAGREGASI DATA HUJAN TEMPORAL DENGAN PENDEKATAN BAYESIAN SEBAGAI INPUT PEMODELAN BANJIR

TEMPORAL RAINFALL DISAGREGATION MODEL USING BAYESIAN APPROACH AS FLOOD MODELLING

Created by :
HIDAYAH, ENTIN  ( 3107301001 )



SubjectPengambilan keputusan
Alt. Subject Bayasian statistical decision theory
KeywordDisagregai data hujan
PAR
Bayesian
Adjusting
Filtering

[ Description ]

Pemodelan hujan-aliran dalam rangka mengestimasi debit banjir rencana membutuhkan data hujan resolusi tinggi (jam-jaman). Pada umumnya, di Indonesia yang tersedia adalah alat pengukur hujan harian, sedangkan alat pengukur hujan otomatis (yang menyediakan data hujan secara jam-jaman) jumlahnya terbatas. Penelitian ini bertujuan untuk membuat model disagregasi data hujan harian menjadi jam-jaman guna menyediakan input data pemodelan banjir. Data diambil dari dari satu lokasi stasiun pengukur hujan di Stasiun Sentral, Bondowoso Jawa Timur. Data yang digunakan untuk memodelkan adalah data series bulan Desember dari tahun 2005-2008. Penelitian ini mencoba untuk mendisagregasi data hujan skala jamjaman dari data hujan skala harian menggunakan model time series autoregresi Periodik (PAR(1)24) yang diberi perlakuan dengan prosedur adjusting dan filtering. Metode yang digunakan dalam proses estimasi model ini adalah Bayesian Markov Chain Monte Carlo (MCMC) yang dibantu dengan sofware statistik WinBUGS 1.4. Model ini dievaluasi melalui membandingkan model dengan hasil implementasi Heytos. Selanjutnya, prediksi model disagregasi hujan ini dibantu dengan Matlab yang dihubungkan dengan WinBUGS. Hasil simulasi model PAR (1)24 yang diberi perlakuan dengan adjusting dan filtering ini memberikan nilai Mean Absolute Error (MAE) sebesar 0,44. Model ini mampu meningkatkan kinerja sebesar 15 % jika dibandingkan hasil aplikasi Heytos. Kinerja prediksi model menunjukkan hasil yang bagus untuk tinggi hujan maksimum (selisih tinggi hujannya hanya 6,1 % terhadap tinggi hujan observasi). Keandalan model ini telah diuji untuk dua kejadian. Pertama, implementasi untuk bulan Desember tahun 2009 memberikan kinerja yang bagus dengan nilai MAE 0.37. Kedua, hasil kalibrasi dan implementasi model untuk bulan-bulan lain selain Desember tahun 2005-2008 menunjukkan bahwa model ini mampu mendisagregasi data hujan dari harian ke jam-jaman terutama pada bulan basah. Pemanfaatan data hasil disagregasi telah diuji dalam perhitungan hidrograf banjir dengan hasil yang sangat memuaskan karena menghasilkan hidrograf banjir yang polanya mirip dengan hidrograf banjir yang dibangun dari data observasi.


Alt. Description

Rainfall-runoff modeling in order to estimate the flood design requires high resolution rainfall (hourly) data. In general, in Indonesia, there are lack of automatic rain gauges providing high resolution rainfall, and a number of daily rain gauges, on the other hand, is available. This is an obstacle for rainfallrunoff modeling. This research is aimed to create a model of disaggregated daily rainfall data into hourly rainfall data in order to provide input for flood modeling. The research is conducted in a single location at Sentral Station. The data used in this modeling is the rainfall data series in December from 2005 to 2008 in Sentral Station, Bondowoso East Java. This study tries to disaggregating daily scaled rainfall data to hourly scaled rainfall data using periodic auto-regression model (PAR (1)24) coupled with adjusting and filtering procedures. The model is employed for estimating the hourly rainfall from daily rainfall. The Bayesian Markov Chain Monte Carlo (MCMC), WinBUGS 1.4 is utilized for the purpose. The Evaluation of model is compared the results provided by the Heytos program. Furthermore, the prediction of the disaggregated data is modeled by using Matlab linked with WinBUGS. The simulation model of PAR (1)24 coupled with adjusting and filtering procedures gives Mean Absolute Error (MAE) value of 0.44. This model has successfully increased the performance of the output by15% compared to the results of Heytos application. This model demonstrates better prediction of maximum rainfall depth (only 6.1% differ from the observation ) than the Heytos. The reliability of this model is tested for 2 conditions. Firstly is by implementing the model to the rainfall data in December 2009. I shows that this model works significantly well in disaggregating the rainfall data from daily to hourly with the MAE value of 0.37. Secondly is by calibrating and implementing the model to the rainfall data in Januari-Nopember 2005-2008. It shows that this parameter model works well mostly for wet seassons.The data obtained from the model has been used for developing a flood hydrograph and the result shows the similarity with the one build by using observed data.

Contributor:
  1. Prof. Dr. Ir. Nadjadji Anwar, M.Sc
  2. Prof. Drs. Nur Iriawan, MIKomp. PhD
Date Create:11/02/2011
Type:Text
Format:pdf
Language:Indonesian
Identifier:ITS-Undergraduate-3100011042955
Collection ID:3100011042955
Call Number:RDS 519.542 Hid m


Source :
Disertasi of Civil Engineering, RDS 519.542 Hid m, 2011

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[ Free Download - Free for All ]

  1.  ITS-PhD-15746-model-disagregasi-data-hujan-temporal-denganpendekatan-bayesian-sebagai-input-pemodelan-banjir.pdf - 195 KB pdf files
  2.  ITS-PhD-15746-temporal-rainfall-disagregation-model-usingbayesian-approach-as-flood-modelling.pdf - 96 KB pdf files
  3.  ITS-PhD-15746-Approval_Sheet.pdf - 753 KB pdf files
  4.  ITS-PhD-15746-Abstract_id.pdf - 221 KB pdf files
  5.  ITS-PhD-15746-Abstract_en.pdf - 180 KB pdf files
  6.  ITS-PhD-15746-Table_of_Content.pdf - 313 KB pdf files
  7.  ITS-PhD-15746-Tables.pdf - 230 KB pdf files
  8.  ITS-PhD-15746-Illustrations.pdf - 247 KB pdf files
  9.  ITS-PhD-15746-Notations.pdf - 255 KB pdf files
  10.  ITS-PhD-15746-Bibliography.pdf - 297 KB pdf files
  11.  ITS-PhD-15746-Chapter1-314659.pdf - 307 KB pdf files
  12.  ITS-PhD-15746-Conclusion-1468276.pdf - 1434 KB pdf files
  13.  ITS-PhD-15746-Paper-860954.pdf - 841 KB pdf files
  14.  ITS-PhD-15746-Enclosure_List.pdf - 226 KB pdf files

[ FullText Content - Please, register first ]

  1. ITS-PhD-15746-Chapter2-447767.pdf - 437 KB pdf files
  2. ITS-PhD-15746-Chapter3-225740.pdf - 220 KB pdf files
  3. ITS-PhD-15746-Chapter4-1108865.pdf - 1083 KB pdf files
  4. ITS-PhD-15746-Enclosure-1485139.pdf - 1450 KB pdf files
  5. ITS-PhD-15746-Enclosure-1502176.pdf - 1467 KB pdf files
  6. ITS-PhD-15746-Enclosure-1496856.pdf - 1462 KB pdf files
  7. ITS-PhD-15746-Enclosure-1503241.pdf - 1468 KB pdf files
  8. ITS-PhD-15746-Enclosure-1280074.pdf - 1250 KB pdf files
  9. ITS-PhD-15746-Enclosure-394692.pdf - 385 KB pdf files


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Adjusting , Bayesian , Disagregai , Disagregai data hujan , Filtering , PAR , data , hujan




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