scholarly journals Uncertainty analysis of flood control design under multiple floods

2020 ◽  
Author(s):  
Yuming Huang ◽  
Yanjie Li ◽  
Min Liu ◽  
Liang Xiao ◽  
Fuwan Gan ◽  
...  
Keyword(s):  
Uncertainty Analysis ◽  
Return Period ◽  
Flood Control ◽  
Control Design ◽  
Specific Aspect ◽  
Flood Peak ◽  
Multivariate Frequency Analysis ◽  
Study Case ◽  
Best Fit

The conventional flood control design analysis usually focuses on a specific aspect like flood peak discharge or the volume of flood, with the development of technology, hydrological analysis tends to be multi-dimensions research. The multivariate frequency analysis of a flood has been widely investigated, while there is lack of literatures about flood control design under multiple floods. In this study, taking the Guiping Shipping Hub as a study case, a Copula-based approach is proposed to investigate the flood control design under multiple floods, comparison between the proposed method and conventional approach is investigated, the sampling uncertainty is analyzed. The results indicate that (1) the joint distribution of main and tributary floods is modeled by Clayton Copula with PE3 as the best-fit marginal distributions. The proposed Flood Control return period (FC-RP) can describe the different role of main and tributary floods in flood control design. (2) flood combinations uncertainty analysis indicates that the uncertainty of the joint design combinations under the effect of multiple floods decreases with the increase of sample size n, but increases with the increase of the design return period. (3) the 95% confidence interval and standard deviation of the design value of flood control design water level calculated by Flood Control RP is smaller than that of OR RP, which means the Flood Control RP can reduce the uncertainty of flood control design under the condition of multiple floods.

scholarly journals Study of Flood and Coastal Flood Control in Madukoro Area, Semarang City, Indonesia

2018 ◽  
Vol 4 (3) ◽  
pp. 189
Author(s):  
Dian Wahyu Jatmiko
Keyword(s):  
Water Level ◽  
Land Subsidence ◽  
Return Period ◽  
Flood Control ◽  
High Tide ◽  
Northern Coast ◽  
Flood Peak ◽  
Runoff Volume ◽  
Total Runoff ◽  
Drainage Channels

Madukoro area located on the northern coast of Semarang City has been prone to flooding caused by rainfall and seawater high-tide. Ineffective flood control management and land subsidence are considered as the cause of this problem. In order to understand land subsidence effect and flood control performance, location, water surface height of the inundation in West Flood Canal, western part of Madukoro area need to analyze. Flood analysis was conducted using HEC-HMS software and rational method. Flow hydraulics on five channels, i.e. the West Flood Canal, Ronggolawe River, Karangayu River, Arterial Channel and Madukoro were analyzed using HEC-RAS software. Increasing levee level and additional water pumps in Madukoro and Ronggolawe were chosen as flood control alternatives. Its performance was investigated through software simulation. The results showed total runoff volume in all drainage channels for 2-years return period discharge was about 80% of capacity with 0.7 m water depth. Runoff volume in West Flood Canal with 50-years return period discharge was about 40%. Land subsidence 4 cm/year affected the water level increase on West Flood Canal. Operation of 2 - 4 pump units could not significantly decrease water level at flood peak, yet increase flood recession time 6 - 8 hours. 

Sewer System for Improving Flood Control in Tokyo: A Step towards a Return Period of 70 Years

1994 ◽  
Vol 29 (1-2) ◽  
pp. 303-310 ◽  
Author(s):  
Kazuyuki Higuchi ◽  
Masahiro Maeda ◽  
Yasuyuki Shintani
Keyword(s):  
Return Period ◽  
Flood Control ◽  
Rainfall Intensity ◽  
Runoff Coefficient ◽  
Large Drop ◽  
Construction Costs ◽  
Sewer System ◽  
Construction Period ◽  
Metropolitan Government ◽  
Under Construction

The Tokyo Metropolitan Government has planned future flood control for a rainfall intensity of 100 mm/hr, which corresponds to a return period of 70 years, and a runoff coefficient of 0.8. Considering that the realization of this plan requires a long construction period and high construction costs, the decision was made to proceed by stages. In the first stage, the improvement of the facilities will be based on a rainfall intensity of 75 mm/hr (presently 50 mm/hr), corresponding to a return period of 17 years, and a runoff coefficient of 0.8. In the next stage the facilities will be improved to accommodate a rainfall intensity of 100 mm/hr. In the Nakano and Suginami regions, which suffer frequently from flooding, the plan of improvement based on a rainfall intensity of 75 mm/hr is being implemented before other areas. This facility will be used as a storage sewer for the time being. The Wada-Yayoi Trunk Sewer, as a project of this plan, will have a diameter of 8 m and a 50 m earth cover. This trunk sewer will be constructed considering several constraints. To resolve these problems, hydraulic experiments as well as an inventory study have been carried out. A large drop shaft for the trunk sewer is under construction.

scholarly journals Hydraulic Evaluation of the Levee System Evolution on the Kurobe Alluvial Fan in the 18th and 19th Centuries

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4406
Author(s):  
Tadaharu Ishikawa ◽  
Hiroshi Senoo
Keyword(s):  
Channel Capacity ◽  
Flood Control ◽  
River Flow ◽  
Global Climate ◽  
Flow Simulation ◽  
Japan Sea ◽  
Main Channel ◽  
Alluvial Fan ◽  
Flood Peak ◽  
Levee System

The development process and flood control effects of the open-levee system, which was constructed from the mid-18th to the mid-19th centuries, on the Kurobe Alluvial Fan—a large alluvial fan located on the Japan Sea Coast of Japan’s main island—was evaluated using numerical flow simulation. The topography for the numerical simulation was determined from an old pictorial map in the 18th century and various maps after the 19th century, and the return period of the flood hydrograph was determined to be 10 years judging from the level of civil engineering of those days. The numerical results suggested the followings: The levees at the first stage were made to block the dominant divergent streams to gather the river flows together efficiently; by the completed open-levee system, excess river flow over the main channel capacity was discharged through upstream levee openings to old stream courses which were used as temporary floodways, and after the flood peak, a part of the flooded water returned to the main channel through the downstream levee openings. It is considered that the ideas of civil engineers of those days to control the floods exceeding river channel capacity, embodied in their levee arrangement, will give us hints on how to control the extraordinary floods that we should face in the near future when the scale of storms will increase due to the global climate change.

The Mediating Role of Job Satisfaction in the Work Stress-Marital Interaction Relationship

1994 ◽  
Vol 24 (3) ◽  
pp. 122-130 ◽  
Author(s):  
Lynne Widrich ◽  
Karen Ortlepp
Keyword(s):  
Job Satisfaction ◽  
Work Stress ◽  
Causal Link ◽  
Work And Family ◽  
Specific Aspect ◽  
Self Report ◽  
Marital Interaction ◽  
Marital Functioning ◽  
The Relationship

The present study examined the relationship between work stress and a specific aspect of marital functioning, namely, marital interaction. An interactionist model of stress was adopted, with three role stresses, namely, role ambiguity, role conflict and role overload, being used as indicators of work stress. Despite the abundance of studies investigating the link between employment and family functioning over the past decade, the causal link between the two domains remains unclear. As previous research has indicated that the relationship between work and family is neither simple nor linear, the present study aimed to investigate the role of job satisfaction in the relationship. The final sample of the study consisted of 80 married men employed in a large financial organization. Data were gathered in the form of self-report questionnaires. Statistical analysis, using a longitudinal path analytic research design, did not support the proposed mediational model, that is, job satisfaction was not found to mediate the relationship between work stress and marital functioning.

scholarly journals School Climate and Perceived Academic Performance: Direct or Resilience-Mediated Relationship?

2020 ◽  
Vol 13 (1) ◽  
pp. 68
Author(s):  
Naiara Escalante Mateos ◽  
Arantza Fernández-Zabala ◽  
Eider Goñi Palacios ◽  
Iker Izar-de-la-Fuente Díaz-de-Cerio
Keyword(s):  
Academic Performance ◽  
School Climate ◽  
Basque Country ◽  
School Adjustment ◽  
Specific Aspect ◽  
Mediation Model ◽  
Mediating Role ◽  
Resilience Scale ◽  
Climate Scale

Although there is a growing interest in identifying the variables that enhance student school adjustment, there is a lack of understanding of the mechanisms involved in it during adolescence. Despite there being works that confirm the positive relationship between school climate and academic performance, it is still unresolved which of the more specific aspects of climate are linked to this performance, as well as the degree to which an individual variable such as resilience can play a mediating role between both; these unknown factors constitute the objective of this study. A total of 731 students (mean age, Mage = 15.20 years; Standard Deviation, SD = 1.62) from the Basque Country participated; they completed the PACE-33 -school climate scale-, the CD-RISC10 -resilience scale- and the EBAE-10 -perceived academic performance subscale-. The full mediation model and the partial mediation model were tested. The results show that the model of choice is that of partial mediation: the resilience mediates the relationship between two specific aspects of the school climate (peer relationship and teachers’ ability to motivate) and perceived academic performance, and a third specific aspect (teachers’ expectations) has a direct relationship with perceived academic performance. These findings highlight the importance of attending to variables specific to the context in which the subject interacts, with the role of the teacher being especially important, in addition to promoting the development of resilience, due to the weight it has on the perception that students have about their school performance.

CAPITANAS Y PATRONAS. MUJERES EN LA ACTIVIDAD CORSARIA DE MALLORCA EN EL SIGLO XVII

2021 ◽  
pp. 1-30
Author(s):  
Andreu Seguí Beltrán
Keyword(s):  
Maritime Economy ◽  
Study Case ◽  
Current Lines

ABSTRACT This paper belongs to the current lines of research on women in the pre-industrial maritime economy. It offers a study case focused on “captaines” and “shipmistresses” during the rise of corsair activity in Majorca between 1635-80. We remark the role of these women representing their husbands while they were absent. Some of them did an outstanding job assuming agency when the situation demanded to go further than what the deputyship established. We also state “captaines” and “shipmistresses” had greater prominence in four areas of a corsair business, in which family was essential.

The Interrelation between Public Participation and Access to Justice in the eia Context in the Face of the Increasing Use of Digital Technologies: Comment on the cjeu Judgment in the A.Flausch et al Case (C-280/18)

2021 ◽  
Vol 18 (1-2) ◽  
pp. 39-55
Author(s):  
Vasiliki (Vicky) Karageorgou
Keyword(s):  
Public Participation ◽  
Digital Technologies ◽  
Specific Aspect ◽  
Time Limit ◽  
Access To Justice ◽  
Eu Law ◽  
The Public ◽  
The Face ◽  
Procedural Autonomy

Abstract The article analyzes the cjeu Judgment in the A. Flausch et al case, which concerns the compatibility of the Greek procedural rules relating to specific aspects of the public participation in the eia context and to a specific aspect of access to justice (time limit) with the respective EU Law provisions in the face of the increasing use of digital technologies in the public participation procedures. This ruling is important, because it sets limits to the procedural autonomy of ms when it comes to the rules that are applied to the eia-related disputes and those that concern the public participation arrangements. It demonstrates, though, the lack of a steady line in the Court’s jurisprudence concerning the standards for assessing the national procedural rules and the role of Article 47 cfr. Moreover, the Court did not lay the ground for an interpretation of the ΕU public participation provisions in a way that an obligation for taking measures could be established, with the aim to ensure equal participation opportunities.

L'attaccamento al partner e a Dio come risorsa psicologica nel processo di adattamento alla malattia cancro

2009 ◽  
pp. 59-74
Author(s):  
R. Cassibba ◽  
E. Costantino ◽  
S. Papagna ◽  
R. Montanaro ◽  
V. Mattioli
Keyword(s):  
Specific Aspect ◽  
Insecure Attachment ◽  
Attachment To God ◽  
Secure Attachment ◽  
Coping With Cancer ◽  
Behavioral System ◽  
Fighting Spirit ◽  
Diagnosis Of Cancer ◽  
Relational Resources

- The diagnosis of cancer troubles people and their identity; it is a threat for their survival. To cope with cancer, people have to collect all their psychological and relational resources. The behavioral system of attachment is activated when people are in danger and it makes them looking for significant others who can be a "secure base" for them. This study investigates the role of specific adult attachment relationships, such as the bond with God and with the partner, on coping with cancer, hypothesizing that patients with a secure attachment with God or with the partner cope better and perceive less stress, respect to patients with an insecure attachment. The results show that the intensity of religious beliefs and security of attachment with God and with the partner are associated to some specific coping strategies to cancer. In particular, insecurity of attachment to God and a specific aspect of insecurity of attachment to the partner (fear of loss) are connected to a higher level of anxiety and a lower level of fighting spirit in coping with cancer. Only attachment to God is associated to a lower level of perceived stress.

Simulation of karst floods with a hydrological model improved by meteorological model coupling

2021 ◽  
Keyword(s):  
Flood Control ◽  
Underground Structure ◽  
Wrf Model ◽  
Precipitation Forecast ◽  
Karst Area ◽  
Peak Time ◽  
Flood Prediction ◽  
Meteorological Model ◽  
Flood Peak ◽  
Flood Warning

Abstract Karst basins are prone to rapid flooding because of their geomorphic complexity and exposed karst landforms with low infiltration rates. Accordingly, simulating and forecasting floods in karst regions can provide important technical support for local flood control. The study area, the Liujiang karst river basin, is the most well-developed karst area in South China, and its many mountainous areas lack rainfall gauges, limiting the availability of precipitation information. Quantitative precipitation forecast (QPF) from the Weather Research and Forecasting model (WRF) and quantitative precipitation estimation (QPE) from remote sensing information by an artificial neural network cloud classification system (PERSIANN-CCS) can offer reliable precipitation estimates. Here, the distributed Karst-Liuxihe (KL) model was successfully developed from the terrestrial Liuxihe model, as reflected in improvements to its underground structure and confluence algorithm. Compared with other karst distributed models, the KL model has a relatively simple structure and small modeling data requirements, which are advantageous for flood prediction in karst areas lacking hydrogeological data. Our flood process simulation results suggested that the KL model agrees well with observations and outperforms the Liuxihe model. The average Nash coefficient, correlation coefficient, and water balance coefficient increased by 0.24, 0.19, and 0.20, respectively, and the average flood process error, flood peak error, and peak time error decreased by 13%, 11%, and 2 hours, respectively. Coupling the WRF model and PERSIANN-CCS with the KL model yielded a good performance in karst flood simulation and prediction. Notably, coupling the WRF and KL models effectively predicted the karst flood processes and provided flood prediction results with a lead time of 96 hours, which is important for flood warning and control.

EFFECTS OF CLIMATE ON THE ARCHITECTURAL AND URBAN DESIGN OF TRIPOLI

2021 ◽  
Vol 3 (4) ◽  
pp. 295-311
Author(s):  
AbuRawi Mustafa ALMARKIYAH ◽  
Fouziya Alzarqani Ipraheem FADHLULLAH
Keyword(s):  
Urban Design ◽  
Architectural Design ◽  
Building Design ◽  
Active Role ◽  
Motion Path ◽  
Qualitative And Quantitative ◽  
Architectural Elements ◽  
Study Case ◽  
The City

Tripoli is a city of a Mediterranean Sea climate; this has contributed with some social and religious factors to affect the architectural and urban design, which all originally has come from the Islamic content. This study argues the climatic features of Tripoli in order to show the ways followed by the Libyan Muslim architect. In other words, these ways were used to adapt with the climate and create the demanding architectural treatments, which have served the building units. This is considered as a study case that can discuss the possibility of the climatic reflection on the walls. That is to say, the walls’ thickness, the type of the used substance in building, the substance’s properties, the type of roof used in covering the building units and the architectural design of the building as treatments achieved professionally by the architect in decreasing the heat in summer and increasing the heat in winter through the mass block. Additionally, the researchers have stated that Tripoli’s building design respected the privacy of the inhabitants and their isolation from the world outside their buildings. That is because they wanted to have their own cold spaces inside which were rich of light, air and shadow. As a result of the aforementioned considerations, the architectural buildings contained the uncovered space and the broken entrance to keep the privacy from the passengers and to protect the inhabitants from wind and sand. These were regarded as final solutions for the architectural and climatic problem. Further, this study illustrates the active role of using the planning including the architectural formations and the treatments of motion path. That is according to their width, their length, their form, their guidance and their direction change in order to make shadow and isolate the front of buildings. This also contributed to give the streets the northern wind which in turn helped to keep the air moving as long as possible to tone down the climatic influences. Moreover, the planning aimed to show its turn through analytical, architectural and documentary survey for realistic examples in the archeological registrar of the potential city treatments. These architectural elements were important in making the sustainable architecture in respect to the environment and human relaxation requirements. Finally, the researchers measured the following factors temperatures, wind, rain, and ratio humidity for variety of spaces in the city. That was followed by qualitative and quantitative statistical analysis supported by graphs

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