Evaluation of Discharges by CSOs from Water Depth Measurements: Case Study of a Lateral with a Low and Long Crest

2002 ◽  
Author(s):  
M. Zug ◽  
F. Blanchet ◽  
C. Joannis ◽  
G. Ruban ◽  
F. Cohen-Solal
Keyword(s):  
Water Depth

scholarly journals Investigation of spillway rating curve via theoretical formula, laboratory experiment, and 3D numerical modeling: A case study of the Riam Kiwa Dam, Indonesia

2021 ◽  
Vol 930 (1) ◽  
pp. 012030
Author(s):  
J Zulfan ◽  
B M Ginting
Keyword(s):  
Numerical Modeling ◽  
Laboratory Experiment ◽  
Water Depth ◽  
Laboratory Model ◽  
Theoretical Formula ◽  
Rating Curve ◽  
3D Numerical Modeling ◽  
Construction Costs ◽  
3D Software

Abstract The spillway rating curve of the Riam Kiwa Dam was investigated via theoretical formula, laboratory experiment, and 3D numerical modeling. It is an ogee type with two uncontrolled and five gated spillways with a total length of 77.5 m. The experiment was performed with a scale of 1:50, while the numerical modeling was conducted using FLOW-3D software. Several discharge values (16.67–2,652.7 m3/s) were tested and observed for two different scenarios of gate openings. For the low discharge in Scenario 1, the theoretical formula and FLOW-3D computed the rating curve less accurately with the error values greater than 10%. A similar phenomenon was observed in Scenario 2, where both theoretical formula and FLOW-3D predicted the rating curve accurately with error values less than 10% for the higher discharge. The discharges tend to be overestimated for the water depth values greater than 2 m giving the average discharge deviation of 6% for the PMF condition. FLOW-3D was found to calculate water depth for all scenarios accurately. It shows a promising approach between numerical simulation and physical modeling, to minimize laboratory model construction costs.

scholarly journals The level of The Utilization of Main Facilities of Birea Fish Landing Base, Bantaeng Regency

2021 ◽  
pp. 15-24
Author(s):  
Darma Darma ◽  
Safruddin Safruddin ◽  
Achmar Mallawa
Keyword(s):  
Key Words ◽  
Direct Observation ◽  
Water Depth ◽  
Secondary Data ◽  
Primary Data ◽  
Utilization Rate ◽  
Production Data ◽  
Research Results ◽  
Pool Area

This study aims to identify main facilities and determine the level of the main facilities utilization of Birea fish landing base, Pa'jukukang District, Bantaeng Regency. The research was conducted from May to July 2020. The method used in this research is a case study. Primary data was consisting of the length of the pier, the distance between ships, the length of time to moor, the length of the breakwater and the length of the trip, and the size and number of ships anchored, were collected through direct observation in the field. Meanwhile, secondary data such as catch production data, development of the number and types of fishing units, the size of the port pool area, and the depth of the waters were taken through the interviews method. The utilization rate of the main facilities utilization of Berea fish landing base are a pier utilization rate of 90.5%, a port pool of 72.5%, a land port 86%, and two meters of water depth are required. Based on the research results, it is found that the long pier is still possible to accommodate ships that are anchored, while the port pool and portland still meet the requirements, however, dredging is necessary for dredging the depth of the waters for shipping in and out of ships. Key words: birea fish landing base, the level of main facilities utilization, bantaeng regency.

scholarly journals The model of low impact development of a sponge airport: a case study of Beijing Daxing International Airport

2020 ◽  
Author(s):  
Jing Peng ◽  
Jiayi Ouyang ◽  
Lei Yu
Keyword(s):  
Water Depth ◽  
Stormwater Management ◽  
Storage Tank ◽  
Comprehensive Evaluation ◽  
Low Impact Development ◽  
Management Model ◽  
Storm Water Management Model ◽  
International Airport ◽  
Removal Capacity

Abstract A sponge airport is a new concept of airport stormwater management, which can effectively relieve airport flooding and promote the usage of rainwater resources, often including the application of low impact development (LID) facilities. Although many airports in China have been chosen to implement sponge airport construction, there is a lack of quantitative evaluation on the effect of LID facilities. This paper takes Beijing Daxing International Airport as a case study and develops a comprehensive evaluation on the effect of LID facilities using the storm water management model (SWMM). The performance of four LID design scenarios with different locations and sizes of the rain barrel, the vegetative swale, the green roof, and the storage tank were analyzed. After LID, the water depth of J7 reduces from 0.6 m to 0.2 m, and duration of accumulated water reduces from 5 hours to 2.5 hours. The water depth of J17 reduces from 0.5 m to 0.1 m, and duration of accumulated water reduces from 2 hours to 15 minutes. The capacity of conduits has been greatly improved (Link 7 and Link 17). The application of LID facilities greatly improves rainwater removal capacity and effectively alleviates the waterlogging risk in the study area.

scholarly journals A sewer overflow mitigation during festival and rainfall periods: case study of Karbala

2020 ◽  
Vol 10 (12) ◽  
Author(s):  
Hussein Abed Obaid Alisawi
Keyword(s):  
Water Management ◽  
Water Depth ◽  
Storm Water ◽  
Management Model ◽  
Sewer Pipe ◽  
Sewer System ◽  
Storm Water Management ◽  
Storm Water Management Model ◽  
Sewer Overflow

AbstractThe objective of the present study to assess the performance of a suggested sewer line by using pipe jacking system (PJS) in order to enhance the sewage capacity and mitigate sewer flooding of historic pilgrimage city of Karbala, Iraq. The storm water management model (SWMM5) was used for this purpose. The simulation of exiting sewer system reveals that sewer discharge during peak pilgrimage period is more than 200% of the capacity of existing sewer line. Installation of SLL having a diameter of 2.5 m at a depth ranging between 12 and 22 m by PJS can reduce water depth in sewer pipe by 78%. The reduction of water depth at sewer pipe can reduce sewer overflow up to 70%, if the system is installed and managed properly. The methodology proposed in the paper can be applied in any location having similar problem with necessary modifications.

scholarly journals Usage of SIMWE model to model urban overland flood: a case study in Oslo

2020 ◽  
Vol 51 (2) ◽  
pp. 366-380 ◽  
Author(s):  
Hong Li ◽  
Hongkai Gao ◽  
Yanlai Zhou ◽  
Chong-Yu Xu ◽  
Rengifo Z. Ortega M. ◽  
...  
Keyword(s):  
Spatial Resolution ◽  
Water Depth ◽  
Large Scale ◽  
Overland Flow ◽  
Depth Maps ◽  
Physically Based ◽  
Spatially Distributed ◽  
Overland Flow Model

Abstract There has been a surge of interest in the field of urban flooding in recent years. However, current stormwater management models are often too complex to apply on a large scale. To fill this gap, we use a physically based and spatially distributed overland flow model, SIMulated Water Erosion (SIMWE). The SIMWE model requires only rainfall intensity, terrain, infiltration, and surface roughness as input. The SIMWE model has great potential for application in real-time flood forecasting. In this study, we use the SIMWE model at two resolutions (20 m and 500 m) for Oslo, and at a high resolution (1 m) at the Grefsen area, which is approximately 1.5 km2 in Oslo. The results show that the SIMWE model can generate water depth maps at both coarse and high resolutions. The spatial resolution has strong impacts on the absolute values of water depth and subsequently on the classification of flood risks. The SIMWE model at a higher spatial resolution produces more overland flow and higher estimation of flood risk with low rainfall input, but larger areas of risk with high rainfall input. The Grefsen case study shows that roads act as floodways, where overland flow accumulates and moves fast.

FHS Semi: A Semisubmersible Design for Dry Tree Applications

2009 ◽  
Author(s):  
Alaa M. Mansour
Keyword(s):  
Gulf Of Mexico ◽  
Water Depth ◽  
Time Domain ◽  
Frequency Range ◽  
Integration Technique ◽  
Natural Period ◽  
Ballast Tank ◽  
New Feature ◽  
Fully Coupled

In this paper the performance of a new conceptual semisubmersible design that provides motion response similar to a Spar is investigated. The new invention introduces a new feature which is the Free-Hanging Solid Ballast Tank, hence the name FHS Semi. The use of the free-hanging Solid Ballast Tank (SBT) significantly increases the heave natural period while controlling the heave response in the wave frequency range and, therefore, enables the use of the FHS Semi in dry tree applications. The new design’s quayside integration technique and its interface with the top tensioned risers are presented in this paper. Case study for the new design to support a 32,000 ST payload including 15 Top Tensioned Risers (TTRs) in an ultra-deepwater of 8,000 ft water depth is considered. Frequency domain and fully coupled time-domain hydrodynamic analyses have been performed and numerical results are presented to illustrate the new semisubmersible design response in extreme Gulf of Mexico hurricane events.

scholarly journals Effects of Water Depth and Ice Thickness on Ice Cover Blasting for Ice Jam Flood Prevention: A Case Study on the Heilong River, China

Water ◽  
2018 ◽  
Vol 10 (6) ◽  
pp. 700
Author(s):  
Tao Wang ◽  
Xinlei Guo ◽  
Hui Fu ◽  
Yongxin Guo ◽  
Xuming Peng ◽  
...  
Keyword(s):  
Water Depth ◽  
Ice Cover ◽  
Ice Thickness ◽  
Flood Prevention ◽  
Ice Jam

scholarly journals BATHYMETRY MAPPING USING HYPERSPECTRAL DATA: A CASE STUDY OF YAMADA BAY, NORTHEAST JAPAN

2016 ◽  
Vol XLI-B7 ◽  
pp. 61-64
Author(s):  
E. Ariyasu ◽  
S. Kakuta ◽  
T. Takeda
Keyword(s):  
Water Depth ◽  
Hyperspectral Image ◽  
Hyperspectral Data ◽  
Inversion Method ◽  
Main Island ◽  
Inherent Optical Properties ◽  
Ground Survey ◽  
Iwate Prefecture ◽  
Sand Bottom

This study aims to examine if the inversion method using hyperspectral data is applicable in Japan. Nowadays, overseas researchers are mainly applied an inversion method for accurately estimating water depth. It is able to gain not only water depth, but also benthic spectral reflection and inherent optical properties (IOPs) at the same time, based on physics-based radiative transfer theory for hyperspectral data. It is highly significant to understand the possibility to develop the application in future for coastal zone of main island, which is a common water quality in Japan, but there is not any case study applied this method in Japan. The study site of Yamada bay in Iwate Prefecture is located in northeast of Japan. An existed analytical model was optimized for mapping water depth in Yamada bay using airborne hyperspectral image and ground survey data which were simultaneously acquired in December, 2015. The retrieved remote-sensing reflectance (R<sub>rs</sub>) is basically qualitatively appropriate result. However, when compared with all ground survey points, the retrieved water depth showed low correlation, even though ground points which are selected sand bottom indicates high relationship. Overall, we could understand the inversion method is applicable in Japan. However, it needs to challenge to improve solving error-caused problems.

scholarly journals Simulation of storm surge inundation under different typhoon intensity scenarios: case study of Pingyang County, China

2020 ◽  
Vol 20 (10) ◽  
pp. 2777-2790
Author(s):  
Xianwu Shi ◽  
Pubing Yu ◽  
Zhixing Guo ◽  
Zhilin Sun ◽  
Fuyuan Chen ◽  
...  
Keyword(s):  
Storm Surge ◽  
Water Depth ◽  
Storm Surges ◽  
Economic Losses ◽  
Astronomical Tide ◽  
Evacuation Plans ◽  
Typhoon Intensity ◽  
Typhoon Tracks ◽  
The Impact

Abstract. China is one of the countries that is most seriously affected by storm surges. In recent years, storm surges in coastal areas of China have caused huge economic losses and a large number of human casualties. Knowledge of the inundation range and water depth of storm surges under different typhoon intensities could assist predisaster risk assessment and making evacuation plans, as well as provide decision support for responding to storm surges. Taking Pingyang County in Zhejiang Province as a case study area, parameters including typhoon tracks, radius of maximum wind speed, astronomical tide, and upstream flood runoff were determined for different typhoon intensities. Numerical simulations were conducted using these parameters to investigate the inundation range and water depth distribution of storm surges in Pingyang County considering the impact of seawall collapse under five different intensity scenarios (corresponding to minimum central pressure values equal to 915, 925, 935, 945, and 965 hPa). The inundated area ranged from 103.51 to 233.16 km2 for the most intense typhoon. The proposed method could be easily adopted in various coastal counties and serves as an effective tool for decision-making in storm surge disaster risk reduction practices.

Case Study of a 300-ft Water Depth Jackup in a Class IV Hurricane

2004 ◽  
Author(s):  
Harvey Duhaney ◽  
Harold Keys ◽  
Paul Daigle ◽  
John Laird
Keyword(s):  
Water Depth ◽  
Class Iv
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