Flood Discharge Estimation in Baddegama Using Pearson Type III and Gumbel Distributions

2021 ◽  
pp. 329-337
Author(s):  
T. N. Wickramaarachchi
Keyword(s):  
Type Iii ◽  
Flood Discharge ◽  
Pearson Type ◽  
Discharge Estimation

scholarly journals Analysis of Cross-Sectional Capacity of the Jambi River in the Muaro Jambi Temple About Various Times of Flooding Using HEC-RAS Software

2021 ◽  
Vol 004 (02) ◽  
pp. 127-140
Author(s):  
Putri Mayasari ◽  
Freddy Ilfan ◽  
Yasdi Yasdi ◽  
Rimba Rimba
Keyword(s):  
Water Level ◽  
Return Period ◽  
Unit Hydrograph ◽  
Cross Sectional ◽  
Tourist Attractions ◽  
Type Iii ◽  
Flood Discharge ◽  
Temple Complex ◽  
Pearson Type ◽  
Synthetic Unit Hydrograph

Jambi River is one of the rivers located in the Muaro Jambi Temple Complex Area, Muaro Jambi Regency, Jambi Province. Muaro Jambi Temple is one of the tourist attractions in Jambi Province. This study aims to find the capacity of Jambi River tested by planned flood discharge utilizing (synthetic unit hydrograph) HSS Nakayasu method for a return period of two, five, ten, twenty-five, fifty and hundred years. HEC-RAS software used to analyse the water level in the Jambi River towards the flood potential that causes the submerging of the Kedaton Temple building. This research used the log Pearson type III method to calculate the planned rain return period and used the Nakayasu synthetic unit method to calculate the planned flood discharge. The analysis showed that the Jambi River could not load the flood discharge in the five, ten, twenty-five, fifty, and one hundred years return period at several measurement points: river sta-1, river sta-2 and river sta-5. The floodwater level did not cause the Kedaton Temple building to be flooded from the simulation result

ESTIMATION OF THE T-YEAR SPECIFIC DISCHARGE USING THE REGIONALISED SKEWNESS COEFFICIENT OF THE LOG-PEARSON TYPE III DISTRIBUTION

2020 ◽  
Author(s):  
Jakub Mészáros ◽  
◽  
Pavol Miklánek ◽  
Pavla Pekárová ◽  
◽  
...  
Keyword(s):  
River Basin ◽  
Type Iii ◽  
River Region ◽  
Pearson Type ◽  
Skewness Coefficient ◽  
Distribution Parameters ◽  
Design Values ◽  
Specific Discharge ◽  
Morava River ◽  
Pearson Type Iii Distribution

In this paper the results are presented of estimation of T-year specific discharge of several streams in two regions in Slovakia. The Qmax time series used in the study were observed at water gauges from lowland Slovak part of the Morava River basin, and from the mountainous Belá River basin. For estimating the design values, we have studied the use of only one type of probability distribution, namely the Log-Pearson Type III Distribution (LP3 distribution). The use of only one type of distribution brings several benefits, e.g. possibility of the regionalization of the distribution parameters (in this study skew coefficient). In the first step the design values of the specific discharge series qmax (with historical data) were estimated and regional skew coefficients Gr of the LP3 distribution were computed. Regional skewness coefficient Gr was estimated to be 0.38 in the Morava River region, and 0.73 in the Belá River region. In many cases the estimate of the 1000-year specific discharge is two times higher than the value of the 100-year specific discharge. Then we have derived the empirical relations between station skew coefficient G and the elevation of the water gauge. In the second step we have derived the empirical relationships between 1000-years specific discharge q1000 and the elevation of the water gauge for both regions separately. The derived empirical regional equations can be used to estimate the 1000-years specific discharge of other streams in the region.

An Empirical Study of an Estimate of Skewness for the Pearson Type III Distribution

1956 ◽  
Vol 10 (2) ◽  
pp. 13
Author(s):  
John Caffrey ◽  
N. C. Perry ◽  
D. Teichroew
Keyword(s):  
Empirical Study ◽  
Type Iii ◽  
Pearson Type ◽  
Pearson Type Iii Distribution

scholarly journals A best-fit probability distribution for the estimation of rainfall in northern regions of Pakistan

2016 ◽  
Vol 11 (1) ◽  
pp. 432-440 ◽  
Author(s):  
M. T. Amin ◽  
M. Rizwan ◽  
A. A. Alazba
Keyword(s):  
Probability Distribution ◽  
Goodness Of Fit ◽  
Probability Distributions ◽  
Future Research ◽  
Maximum Rainfall ◽  
Type Iii ◽  
Goodness Of Fit Tests ◽  
Pearson Type ◽  
Northern Regions ◽  
Best Fit

AbstractThis study was designed to find the best-fit probability distribution of annual maximum rainfall based on a twenty-four-hour sample in the northern regions of Pakistan using four probability distributions: normal, log-normal, log-Pearson type-III and Gumbel max. Based on the scores of goodness of fit tests, the normal distribution was found to be the best-fit probability distribution at the Mardan rainfall gauging station. The log-Pearson type-III distribution was found to be the best-fit probability distribution at the rest of the rainfall gauging stations. The maximum values of expected rainfall were calculated using the best-fit probability distributions and can be used by design engineers in future research.

scholarly journals MENENTUKAN DISTRIBUSI REPRESENTATIF FREQUENSI CURAHAN HUJAN HARIAN MAKSIMUM DENGAN METODEHISTOGRAM DAN METODE PARAMETIK DI PROVINSI SUMATERA BARAT

2018 ◽  
Vol 1 (1) ◽  
Author(s):  
Selpa Dewi
Keyword(s):  
Goodness Of Fit ◽  
Type Iii ◽  
Pearson Type ◽  
Chi Squared ◽  
Anderson Darling

Penelitian ini bertujuan untuk menentukan distribusi yang representatif frequensi curahan hujan harian maksimum di Provinsi Sumatera Barat. Data yang digunakan untuk penelitian ini diambil dari data hujan maksimum harian selama 20 sampai 40 tahunan, dengan 24 stasiun penakar hujan untuk provinsi Sumatera Barat. Data masing-masing stasiun kemudian disusun dalam dua jenis deret data, yaitu deret data annual maxima dan deret data annual exceedances. Dari hasil uji deret data ini diharapkan mengikuti satu atau beberapa dari distribusi yang umum dipakai dalam hidrologi rekayasa, yaitu distribusi normal, normal-log, Gumbel, Gama-II, Gama-III dan distribusi Log-Pearson Type III (LP-III). Dengan mengunakan uji kecocokan (goodness of fit), uji parametrik, Chi-Squared test, Kolmogorov-Smirnovtest dan Anderson-Darling test ditambah dengan metode histrogram (visual).Kata kunci:Intensitas hujan distribusi representative annual maxima, annual exceendances, goodness of fitprovinsi Sumatera Barat.

scholarly journals Analyses of flood peak discharge in Cimadur river basin, Banten Province, Indonesia

2021 ◽  
Vol 331 ◽  
pp. 08006
Author(s):  
Arniza Fitri ◽  
Muhammad Shubhi Nurul Hadie ◽  
Adelia Agustina ◽  
Dian Pratiwi ◽  
Susarman ◽  
...  
Keyword(s):  
River Basin ◽  
Return Period ◽  
Daily Rainfall ◽  
Annual Rainfall ◽  
Rainfall Distribution ◽  
Flood Peak ◽  
Type Iii ◽  
Pearson Type ◽  
Catchment Areas ◽  
Peak Discharges

Cimadur river basin is one of the most important catchment areas in Lebak District, Banten Province. For the past few years, the catchment has experienced floods during the rainy season. The big issue of flooding has been recorded recently in December 2019 which has caused damage and negative impacts to the local people and surrounding community. This study aims to analyze the possibility of flood peak discharges in the catchment area of the Cimadur river. The flood discharges are calculated for 2, 5, 10, 25, 50, and 100 years return period based on the daily rainfall data from the year 2011 to 2020. The rainfall and land use data are obtained from PT Saeba Consultant. In this study, the hydrological analyses are including 1) analyses of average annual rainfall using the Thiessen method; 2) analyses of rainfall distribution and estimation of design rainfall by considering three methods involving: Log-Normal, Log Pearson Type III, and Gumbel Type 1; and 3) analyses of flood discharges by adopting Nakayasu Synthetic Hydrograph Unit (SHU). The rainfall distribution analyses show that the Log Pearson Type III provided the best fit. Based on the flood peak discharges analyses, the results show that the flood discharges for the 5, 10, 25, and 50 years return period in the Cimadur river basin are 470.71 m3/s, 560.16 m3/s, 698 m3/s, and 820.4 m3/s, respectively.

scholarly journals Estimation of T-year flows using a regional skewness coefficient of Log-Pearson type III. Distribution

2019 ◽  
Vol 20 (1) ◽  
Author(s):  
Jakub Mészáros ◽  
Pavla Pekárová ◽  
Katarína Melová ◽  
Ján Pekár
Keyword(s):  
Type Iii ◽  
Pearson Type ◽  
Skewness Coefficient ◽  
Pearson Type Iii Distribution

scholarly journals Karakteristik Morfometri Dan Hidrologi Daerah Aliran Sungai Way Apu Kabupaten Buru

Agrologia ◽  
2020 ◽  
Vol 9 (1) ◽  
Author(s):  
Rafael M. Osok ◽  
Silwanus M. Talakua ◽  
Alfredo Manusama ◽  
Pieter J. Kunu
Keyword(s):  
Type Iii ◽  
Model Unit ◽  
Pearson Type ◽  
Log Normal

ABSTRAKKarakteristik morfometri penting untuk memahami proses hidrologis  pada suatu DAS. Tujuan penelitian ini (1) mengkaji karakteristik morfometri DAS Way Apu, (2) menganalisis debit banjir rencana dan hidrograf satuan untuk mendukung perencanaan pengembangan bangunan air di DAS Way Apu. Analisis data meliputi karakteristik lahan morfometri DAS, dan hidrologi DAS. Distribusi frekuensi hujan dihitung dengan metode Log-Pearson Type III, Gumbel, Normal, Log-Normal. Hujan dan debit rencana dihitung dengan kala ulang 2, 5, 10, 25, 50, dan 100 tahun untuk masing-masing metode. Debit banjir rencana dihitung dengan metode Rasional, sedangkan model unit hidrograf DAS Way Apu dihitung dengan  metode Nakayasu. Hasil penelitian menunjukkan bahwa bentuk DAS kategori lonjong atau memanjang, dengan 4 orde sungai, pola aliran dendritik, dan kemiringan sungai kecil. Curah hujan rencana untuk periode ulang 2, 5, 10, 20, 25, 50 dan 100 tahun berkisar 37,59 – 185,14 mm (Log Pearson Type  III), 41,32 – 180,28 mm (Gumbel), 47,68 – 139,98 mm (Normal), dan 36,82 – 203,66 mm (Log-Normal). Hasil uji Smornov-Kolmogorof menunjukkan bahwa metode Log-Pearson Type III, Gumbel, dan Log-Normal dapat digunakan untuk perhitungan debit banjir rencana. Data debit banjir rencana Gumbel dapat digunakan untuk umur bangunan air 25 tahun, sedangkan bila bangunan airnya dibangun untuk umur 100 tahun, Log-Normal lebih cocok. Berdasarkan Hidrograf Satuan Sintetik Nakayasu, kapasitas tampung DAS Way Apu adalah 21,37 m3/dtk, dan kondisi ini tidak mampu menampung debit banjir yang terjadi.Kaca Kunci: Karakteristik morfometri DAS, debit banjir rencana, DAS Way Apu

Sign in / Sign up

Export Citation Format

Share Document