hydraulic analysis
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UKaRsT ◽  
2021 ◽  
Vol 5 (2) ◽  
pp. 174
Author(s):  
Prabowo Prabowo ◽  
Gusfan Halik ◽  
Entin Hidayah ◽  
Taqiudin Haq

Flood disasters frequently occurred in Jember Regency, East Java. It is usually caused by the overflow of the Tanggul River in the rainy season, especially in the downstream area. Flood control could be done by building dams, embankments, shortcuts, and other technical flood protections. Meanwhile, mitigation efforts such as developing thematic maps of flood inundation need to be done to minimize losses caused by the flood. This study aims to design a flood mitigation strategy technically. The flood control structure was proposed by designing a shortcut in Kali Tanggul. Its performance was analyzed to reduce flood inundation in the Tanggul watershed. The flood inundation modeling was carried out using spatial analysis using ArcGIS 10.1 and hydraulic analysis using HECRAS 5.0.3. Flood inundation results were compared with the Tanggul watershed flood map developed by UPT PUSDA Lumajang. Based on modeling results, flood control using shortcuts is considered an effective strategy for flood mitigation. It was indicated by the reduction of flood inundation distributions, flood inundation height, and flood-affected areas. The results show that the flood height decrease 0.47 up to 0.56 m


Hydrology ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 186
Author(s):  
Muhammad Kaleem Sarwar ◽  
Muhammad Atiq Ur Rehman Tariq ◽  
Rashid Farooq ◽  
Hafiz Kamran Jaleel Abbasi ◽  
Faraz Ul Haq ◽  
...  

Shock waves are generated downstream of spillways during flood operations, which have adverse effects on spillway operations. This paper presents the physical model study of shock waves at the Mohmand Dam Spillway project, Pakistan. In this study, hydraulic analysis of shock waves was carried out to investigate its generation mechanism. Different experiments were performed to analyze the rooster tail on a flat spillway chute and to examine the factors affecting the characteristics of the rooster tail. The study results show that shock wave height is influenced by spillway chute slope, pier shape, and flow depth. Moreover, the height of the shock wave can be minimized by installing a semi-elliptical pier on the tail part of the main pier. Further modifications in the geometry of the extended tail part of the pier are recommended for the elimination of the shock wave. Based on observed data collected from the model study, an empirical equation was developed to estimate the shock wave height generated on the flat slope spillway chutes (5° to 10°).


Water ◽  
2021 ◽  
Vol 13 (24) ◽  
pp. 3516
Author(s):  
Rosanna Bonasia ◽  
Mackendy Ceragene

The floodplain of La Sabana River, Guerrero State, Mexico, was subject to disastrous floods due to the passage of extreme weather phenomena. This is a situation facing many ungauged rivers in Mexico, as well as in other developing countries, where increased urbanization and a lack of monitoring systems make many inhabited areas more vulnerable to flooding. The purpose of this work is to provide a tool for determining the flood terrain response to flooding based on a hydraulic study. This methodology combines a hydrological analysis of the river basin with the floodplain hydraulic study for the precise identification of overflow points and the resulting flood levels. Results show that, for an ungauged river, hydraulic analysis is an essential tool for determining the main potential flood points and establishing whether the river has the capacity to contain floods. Specifically, it is shown that La Sabana River is predisposed to overflow long before the river reaches its maximum flow, even in correspondence with more frequent flood scenarios. This study shows a further application that a hydraulic model can have to improve flood risk preparedness for ungauged rivers of regions where other types of monitoring tools cannot be used.


2021 ◽  
Vol 173 ◽  
pp. 112850
Author(s):  
Xinghao Wen ◽  
Junjun Li ◽  
Aiguo Sang ◽  
Yong Ren ◽  
Xiaogang Liu ◽  
...  

2021 ◽  
Vol 173 ◽  
pp. 112836
Author(s):  
R. Bonifetto ◽  
A. Di Zenobio ◽  
L. Muzzi ◽  
S. Turtù ◽  
R. Zanino ◽  
...  

2021 ◽  
pp. 108874
Author(s):  
M. Behzadi ◽  
A. Zolfaghari ◽  
M.R. Abbassi ◽  
A. Norouzi ◽  
M.M. Mirzaeegoudarzi

2021 ◽  
Vol 930 (1) ◽  
pp. 012019
Author(s):  
D I Kusumastuti ◽  
A Gustira ◽  
E P Wahono

Abstract Municipal Waterworks Tirta Musi manages and supplies clean water to Palembang city. The distribution network system of Municipal Waterworks Tirta Musi is expected to distribute water sufficiently to all customers in the 18 districts this Municipal Waterworks serves. However, it was found that in Alang-alang Lebar service unit water was not delivered sufficiently. Moreover, Alang-alang Lebar service unit plans to improve the service so that the system will serve increasing customers until the next 20 years. This study aims to analyze the water distribution system to find the cause of insufficient water in Alang-Alang Lebar; predicting the number of customers in the next 20 years, and propose some improvements in the distribution system. A computer program EPANET was used to conduct the simulations on pipe networks. Data required for hydraulic analysis using EPANET was obtained from Municipal Waterworks Tirta Musi. The result shows that head pressure was the main problem in Alang-Alang Lebar. Adding discharge of pump reservoir, enlarging pipe diameters in some parts will improve the distribution performance. The proposed design of the distribution system will be able to deliver water for the next 20 years with an increasing number of the customer.


Author(s):  
Saeid Mohammadzade Negharchi ◽  
Rouzbeh Shafaghat

Abstract Reducing the occurrence of pipe bursts, reducing leakage, and reducing energy consumption are the three main goals in implementing pressure control programs in water distribution networks. Service Pressure Regulation Strategy is an evolved approach that encompasses all goals of pressure management. This paper has investigated this approach in a rural network with hydraulic complexities as a case study so that some parts of the network have excess pressure and other low pressure. A computer code based on the Method of Characteristics (MOC) has been developed for network hydraulic analysis. The generated code analyzes unsteady flow, pressure-driven demand analysis, and dynamic adjustment of pressure control valves based on the target node. Also, the experimental results of a laboratory network have been applied to validate and calibrate the numerical simulation. In addition, by measuring the flow rate and pressure of the network and the results of the MNF method, three consumption patterns were used to generate pulsed nodal demands. Studies show that creating Pressure-Management Areas by hydraulic analysis by MOC will determine the best control strategies. The mean pressure has decreased 54% by applying this strategy. Furthermore, the average fluctuations of pressure have reduced from 9.7 meters to 3.5 meters.


2021 ◽  
Vol 32 (4) ◽  
pp. 30-42
Author(s):  
M. Awad ◽  
H. Mostafa ◽  
A. El-Booz ◽  
A. El-Ghonemy

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