scholarly journals A new synthetic unit hydrograph computation method based on the mass conservation principle

2013 ◽  
Author(s):  
D. K. Natakusumah ◽  
D. Harlan ◽  
W. Hatmoko
Keyword(s):  
Mass Conservation ◽  
Computation Method ◽  
Unit Hydrograph ◽  
Conservation Principle ◽  
Synthetic Unit Hydrograph

scholarly journals A Hybrid MPI-OpenMP Parallel Algorithm for the Assessment of the Multifractal Spectrum of River Networks

Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3122
Author(s):  
Leonardo Primavera ◽  
Emilia Florio
Keyword(s):  
River Basin ◽  
Message Passing Interface ◽  
Multifractal Spectrum ◽  
Computation Method ◽  
Processing Unit ◽  
Unit Hydrograph ◽  
Fast Evaluation ◽  
Correlation Integral ◽  
Central Processing ◽  
Instantaneous Unit Hydrograph

The possibility to create a flood wave in a river network depends on the geometric properties of the river basin. Among the models that try to forecast the Instantaneous Unit Hydrograph (IUH) of rainfall precipitation, the so-called Multifractal Instantaneous Unit Hydrograph (MIUH) by De Bartolo et al. (2003) rather successfully connects the multifractal properties of the river basin to the observed IUH. Such properties can be assessed through different types of analysis (fixed-size algorithm, correlation integral, fixed-mass algorithm, sandbox algorithm, and so on). The fixed-mass algorithm is the one that produces the most precise estimate of the properties of the multifractal spectrum that are relevant for the MIUH model. However, a disadvantage of this method is that it requires very long computational times to produce the best possible results. In a previous work, we proposed a parallel version of the fixed-mass algorithm, which drastically reduced the computational times almost proportionally to the number of Central Processing Unit (CPU) cores available on the computational machine by using the Message Passing Interface (MPI), which is a standard for distributed memory clusters. In the present work, we further improved the code in order to include the use of the Open Multi-Processing (OpenMP) paradigm to facilitate the execution and improve the computational speed-up on single processor, multi-core workstations, which are much more common than multi-node clusters. Moreover, the assessment of the multifractal spectrum has also been improved through a direct computation method. Currently, to the best of our knowledge, this code represents the state-of-the-art for a fast evaluation of the multifractal properties of a river basin, and it opens up a new scenario for an effective flood forecast in reasonable computational times.

scholarly journals Analysis of urban flood using synthetic unit hydrograph (SUH) and flood mitigation strategies along way Halim River: a case study on Seroja street, Tanjung Senang District

2021 ◽  
Vol 331 ◽  
pp. 07015
Author(s):  
Dian Pratiwi ◽  
Arniza Fitri ◽  
Arlina Phelia ◽  
Nabila Annisa Amara Adma ◽  
Kastamto
Keyword(s):  
Mitigation Strategies ◽  
Flood Mitigation ◽  
Trigger Factor ◽  
Urban Flooding ◽  
Unit Hydrograph ◽  
Urban Flood ◽  
Flood Discharge ◽  
Absorption Area ◽  
Synthetic Unit Hydrograph

In the urban area, flooding becomes the most common disaster that has not been resolved until today. The utilization of river border area into housing and lack of absorption area becomes the trigger factor of urban flooding, as what is happening around Way Halim River on Seroja street. In this area, floods often happen during the rainy season, with the latest events recorded on January 21st, 2021. Analysis of flood intensities and discharges can be parameters for the decision-making of flood mitigation strategies. This study aims to analyze the flood discharges along Way Halim River, Seroja street by comparing the flood discharges resulting from three analysis methods of Synthetic Unit Hydrograph (SUH) including Gama I SUH, Nakayasu SUH, and Snyder SUH. Finally, suitable flood mitigation strategies were also proposed in this study based on the flood discharges and rain intensities. The results showed that Nakayasu SUH had the highest peak flood discharge than Snyder SUH and Gama I SUH. Based on the results of the investigation of land suitability; and analysis of rainfall intensities and flood discharges, the proposed flood mitigation in Seroja street is by installing biopore infiltration holes along Seroja street for storing water and reducing the risk of flooding in the area.

scholarly journals The use of NRCS synthetic unit hydrograph and Wackermann conceptual model in the simulation of a flood wave in an uncontrolled catchment/ Zastosowanie syntetycznego hydrogramu jednostkowego NRCS oraz konceptualnego modelu Wackermana do symulacji fali wezbraniowej w zlewni niekontrolowanej

2014 ◽  
Vol 23 (1) ◽  
pp. 53-59 ◽  
Author(s):  
Izabela Pietrusiewicz ◽  
Agnieszka Cupak ◽  
Andrzej Wałęga ◽  
Bogusław Michalec
Keyword(s):  
Conceptual Model ◽  
Peak Flow ◽  
Engineering Calculation ◽  
Point Of View ◽  
Flood Wave ◽  
Unit Hydrograph ◽  
Concentration Time ◽  
Synthetic Unit Hydrograph ◽  
Calculation Point ◽  
Different Levels

Abstract The paper presents the results of using two models: a conceptual model of Wackermann and a NRCS-UH synthetic unit hydrograph, for flow calculation in uncontrolled catchment of the Słonka, Poland. These models were chosen because of simplicity of models’ parameters evaluation, what is important from engineering calculation point of view. Flows with the probability of exceed amounting to 0.5%, 1%, 2%, 5%, 10%, 20%, and 50% and for different levels of the catchment moisture were evaluated. The flood waves generated in the Wackermann model were characterized by a short duration (over 2 hours), shorter concentration time (about 1 hour), and by about 70% higher peak flow values than those generated using the NRCS-UH method. A common feature of both methods were higher values of peak flows for the third level of the catchment moisture, as compared to the second level. It is also worth noticing that in both methods no flood wave was generated for the probabilities of 10, 20 and 50% and for the second level of the catchment moisture. It was assumed that hydrographs made with use Wackermann model better describe flood wave in mountain river, which Słonka is.

Synthetic Unit Hydrograph Development for Ungauged Basins Using Dimensional Analysis

Opflow ◽  
2016 ◽  
Vol 108 ◽  
pp. E145-E153
Author(s):  
Jayantilal N. Patel ◽  
Akshay R. Thorvat
Keyword(s):  
Dimensional Analysis ◽  
Ungauged Basins ◽  
Unit Hydrograph ◽  
Synthetic Unit Hydrograph

Flood Hydrograph with Synthetic Unit Hydrograph Routing

2015 ◽  
Vol 29 (15) ◽  
pp. 5765-5782 ◽  
Author(s):  
M. K. Bhuyan ◽  
Sanjay Kumar ◽  
Joygopal Jena ◽  
P. K. Bhunya
Keyword(s):  
Unit Hydrograph ◽  
Flood Hydrograph ◽  
Synthetic Unit Hydrograph
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