scholarly journals Modelling of natural water retention in the catchment basin of the Opava river during flood

Beskydy ◽  
2013 ◽  
Vol 6 (2) ◽  
pp. 109-116 ◽  
Author(s):  
M. Palát ◽  
M. Palát ◽  
J. Prudký
Keyword(s):  
Water Retention ◽  
Flood Protection ◽  
Catchment Basin ◽  
Protection Measures ◽  
Factors Affecting ◽  
Small Collection ◽  
Long Time ◽  
Short Time ◽  
The Given

The aim of the analysis involved in the article is to define the significance of separate factors affecting the natural process of retention in the catchment basin thus can assess the priorities in undertaking flood protection. The analysis was based on results achieved by using a new method how to determine water retention in the catchment basin. Resulting dependent variables of effective long-time retention, effective short-time retention, effective total retention and maximum specific runoff for single catchment basins of the Opava river, were evaluated statistically by means of linear regression and correlation analysis, stepwise regression and multiple regression. It is possible to say, that the results achieved may suggest to re-evaluate some established views concerning the role of separate factors influencing natural retention of the landscape. The results of the research testify the fact that in case of densely settled floodplain regions the combined flood protection measures, i.e. as technical and nature friendly ones should be applied. Due to relatively small collection of observations it is not possible to generalize all the conclusions absolutely, nevertheless they have a certain validity at least for the given area.

scholarly journals Assessment of the flood damages on the real estate property in the Czech Republic area

2010 ◽  
Vol 56 (No. 7) ◽  
pp. 317-324 ◽  
Author(s):  
J. Korytárová ◽  
V. Hromádka
Keyword(s):  
Real Estate ◽  
Flood Protection ◽  
Protection Measures ◽  
The Real ◽  
The Real Estate ◽  
Estate Property ◽  
Basic Quality ◽  
The Individual ◽  
The Given ◽  
Property Index

The problem of floods can be solved by investment activities in the form of the flood protection measures or by the potential liquidation of damages after the flood. In the frame of the solved grant projects, there was developed the basic methodology for the losses on the immovable property in the territory assessment and consequently the database of input data for its use. The output of the described methodology enables the comparison of the potential losses on immovable property with the investment costs for the flood protection measures. In order to be able to estimate the occurred losses, the own method has been developed by the members of the research team. This method consists of the specification of the territorial property valuation and the evaluation of the damage on the territorial property caused by floods. The basic quality of the Territorial Property Index is that it respects the generally defined structure of the real estate property in the given area. The Territorial Property Index is then calculated for the individual area categories. While evaluating the damage, first the measure of the damages of the property representatives depending on the hydrological situation defined in advance must be investigated. The damages are then estimated based on three defined primary parameters.  

scholarly journals The Role of Memory in the Perception of the Screen Image

2012 ◽  
Vol 4 (2-3) ◽  
pp. 96-105
Author(s):  
Vitaly Fyodorovich Poznin
Keyword(s):  
Human Memory ◽  
The Other ◽  
Screen Image ◽  
Other Hand ◽  
Different Types ◽  
Long Time ◽  
Short Time ◽  
Artistic Image ◽  
Psychology Of Art

The article investigates one of the aspects of psychology of art, namely, the role of different types of human memory — sensory, long-time, short-time — in the forming of an artistic image in the perception of an audiovisual entity. The audience’s perception of such specific cinematic methods as pan shot and dolly shot, as well as different types of parallel, associative and distance montage rests on the peculiarities of our short-time and long-time memory. On the other hand, the complex polyphonic combination of various visual chronotopes in modern films is based on the imitation of memory typical for our dreams.

scholarly journals Development and Prospect of Nanoarchitectured Solar Cells

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Bo Zhang ◽  
Wenxu Xie ◽  
Yong Xiang
Keyword(s):  
Solar Cells ◽  
Solar Cell ◽  
Quantum Effect ◽  
Photovoltaic Device ◽  
Device Performance ◽  
Key Factors ◽  
Factors Affecting ◽  
Long Time ◽  
Lower Production

This paper gives an overview of the development and prospect of nanotechnologies utilized in the solar cell applications. Even though it is not clearly pointed out, nanostructures indeed have been used in the fabrication of conventional solar cells for a long time. However, in those circumstances, only very limited benefits of nanostructures have been used to improve cell performance. During the last decade, the development of the photovoltaic device theory and nanofabrication technology enables studies of more complex nanostructured solar cells with higher conversion efficiency and lower production cost. The fundamental principles and important features of these advanced solar cell designs are systematically reviewed and summarized in this paper, with a focus on the function and role of nanostructures and the key factors affecting device performance. Among various nanostructures, special attention is given to those relying on quantum effect.

Research on the Role of Pre-Oxidation in the Separation of Cu-Pb in the Presence of Potassium Dichromate

2011 ◽  
Vol 402 ◽  
pp. 526-528 ◽  
Author(s):  
Bao Lin Ke ◽  
Jian Hua Chen
Keyword(s):  
Sodium Hypochlorite ◽  
Potassium Dichromate ◽  
Copper Concentrate ◽  
Long Time ◽  
Short Time

It is the most effective method to use potassium dichromate to separate copper from lead when galena is oxidized. However, it needs long time to oxidize galena by potassium dichromate. The efficiency of five oxidants on potassium dichromate depressing ability to galena have been studied completely in this paper, and results suggest that separation of Cu-Pb can be carried out effectively in short time in the presence of potassium dichromate when galena is pre-oxidized by oxidants. Sodium hypochlorite is the best oxidant, and after the interaction of 15 min., the grade and the recovery of copper concentrate are 24.02% and 81.93% respectively, and the grade and the recovery of lead concentrate are 17.88% and 84.98% respectively.

Language factor and Brazilian national identity

2021 ◽  
pp. 94
Author(s):  
Olga Yu. Kornienko
Keyword(s):  
National Identity ◽  
Close Connection ◽  
Indian Languages ◽  
Linguistic Identity ◽  
Factors Affecting ◽  
Complex Processes ◽  
Brazilian Version ◽  
Long Time ◽  
Objective Tool

The article examines the role of the linguistic factor in the formation of linguistic identity in Brazil. National identity reflects the complex processes of the existence and development of a nation in cultural and linguistic environment, the language being not only an important identification factor, but also an objective tool for determining other factors affecting the formation of the Brazilian nation and its identity. The close connection between the ongoing economic, spatial-historical and social processes and the formation of identity is analyzed with the help of the author's method of sociolinguistic isomorphism. It resulted in the following findings: the formation of the Brazilian version of the Portuguese language was greatly influenced by the Indian languages, information about which was meticulously collected and systematized by the Jesuits; the language maintained a close connection with the language of the metropolis for a long time, having taken its own track only after gaining independence. At present the shifts in the linguistic reflection of Brazilian reality are revealed through the polysemy trends, transfer of meaning, professional media slang, youth slang.

scholarly journals Antecedent precipitation index evaluation at chosen climatological stations

2010 ◽  
Vol 58 (4) ◽  
pp. 135-140
Author(s):  
Silvie Kozlovská ◽  
František Toman
Keyword(s):  
Water Retention ◽  
Curve Number ◽  
Precipitation Index ◽  
Water Retention Capacity ◽  
Soil Humidity ◽  
Catchment Basin ◽  
Retention Capacity ◽  
Protection Measures ◽  
Antecedent Precipitation ◽  
Antecedent Precipitation Index

The water retention capacity of a landscape, usually measured for a catchment basin, is a very important and decisive characteristic to identify the runoff amount from the catchment area and, in consequence, for antierosion and flood protection measures. Besides, creating water reserves in the landscape and keeping the water in them is also rather important.Soil humidity contributes to the calculation of potential water retention through modelling the runoff amount and peak discharge from the catchment basin within an area not larger than 5–10 km2. This method is based on curve number values (CN), which are tabulated according to hydrological characteristics of soils, land use, vegetation cover, tillage, antierosion measures and soil humidity, estimated as a 5-day sum of preceding precipitation values. This estimation is known as the antecedent precipitation index and it is divided into 3 degrees – I, II, III. Degree I indicates dry soil but still moist enough to till, whereas degree III means that the soil is oversaturated by water from preceding rainfall. Degree II is commonly used in this context as the antecedent precipitation index. The aim of this paper is to obtain real antecedent precipitation index values in given climatological stations (Brno, Dačice, Holešov, Náměšť nad Oslavou, Strážnice, Telč – Kostelní Myslová, Velké Meziříčí, Znojmo – Kuchařovice) for the period of years 1961 – 2009. Daily precipitation sums higher than 30 mm were considered to be the best candidate for such precipitation value since this occurs approximately once a year in studied areas. The occurence of these sums was also analysed for each month within the growing season (April to October). The analysed data was tabulated by climatological stations in order to check the real occurence of all antecedent precipitation index degrees within the studied period.Finally, the effects of different antecedent precipitation index values on the potential water retention capacity of the sample catchment basin were calculated to compare the results.

scholarly journals Hydraulic Review of the Flood Protection Measures in Bardejov

2021 ◽  
Vol 1203 (3) ◽  
pp. 032095
Author(s):  
Andrej Šoltész ◽  
Lea Cubanová ◽  
Jakub Mydla ◽  
Michaela Cerveňanská ◽  
Dana Baroková
Keyword(s):  
Mathematical Modelling ◽  
Phase I ◽  
Open Channel ◽  
Flood Protection ◽  
Hydraulic Analysis ◽  
Protection Measures ◽  
North East ◽  
The North ◽  
The Given ◽  
The City

Abstract The contribution is dedicated to hydraulic analysis of the flood protection of county town Bardejov in the north-east part of Slovakia where after numerous floods on the Topľa River the flood protection has been constructed just partially in the central residential area of the city (phase I.) Next phases II. and III., which append to phase I. upstream and downstream are currently in a process of evaluation, so the flood protection of the city is far from being complete. The submitted article deals with hydraulic assessment of realized flood protection measures and their impact on proposal of phases II. and III. Authors have solved the given problem using mathematical modelling of open channel flow for steady and unsteady conditions of flood discharge at really measured flood wave in the year 2010 which was very close to the value of Q100 water. At the same time, they have proposed flood protection measures on the Topľa River in localities which are not considered and not solved by present realized flood protection. Proposed flood protection measures downstream and upstream of the realized flood protection were proven by mathematical modelling in HEC-RAS software program and they should get under control even the historical flood which appeared in Bardejov City in 2010.

scholarly journals A Systems Dynamics Simulation Study of Network Public Opinion Evolution Mechanism

2019 ◽  
Vol 27 (4) ◽  
pp. 189-207
Author(s):  
Ge Gao ◽  
Tianyong Wang ◽  
Xianrong Zheng ◽  
Yong Chen ◽  
Xiaobo Xu
Keyword(s):  
Public Opinion ◽  
New Media ◽  
Dynamics Simulation ◽  
Systems Dynamics ◽  
Media Report ◽  
Role Of Government ◽  
Factors Affecting ◽  
Relationship Model ◽  
Long Time

The factors that affect formation and dissemination of public opinion have been studied for a long time. However, the findings are disparate and fragmented, given the characteristics of netizens and new media in the Big Data era. To this end, this article introduces eight mechanisms working on formation and dissemination of public opinion on network. Based on system dynamics, this article further proposes a comprehensive causal relationship model to explore the factors affecting the consequence of public opinion on network. Particularly, the role of government is taken into consideration in this model. A simulation with Vensim PLE is conducted. The results of the simulation indicate that group polarization among netizens, opinion leaders, the quantity of media audience, the frequency of media report, government attention, and warning mechanism for public opinion crisis affect the consequence of public opinion on network significantly. Implications of the findings are discussed.

scholarly journals Urban Riverscapes: Reconnecting Urban Environments With the River Landscape

2021 ◽  
Author(s):  
◽  
Elle Fairgray
Keyword(s):  
New Zealand ◽  
Urban Environment ◽  
Urban Environments ◽  
Flood Protection ◽  
Protection Measures ◽  
Rainfall Events ◽  
Culture History ◽  
River Flood ◽  
Pass Through

<p>Water is a fundamental component of New Zealand’s landscape, culture, history and identity. It is moving, changing form, accumulating and dispersing, it is ever changing never in the same context twice. Rivers are a single representation of this process in which we experience water in the landscape.  New Zealand has beautiful and intense water ways that pass through urban environments, yet due to the flood protection measures in place, they are disconnected from the urban environment. They are difficult to access and do not hold a presence in our growing urban environment which they once had significance in.  Stopbanks are the most common form of river flood protection infrastructure in New Zealand. They treat the river as a static element without giving them the space to move, flood and meander. They create a physical barrier between the urban environment and river space and do not respond to the differences of rivers and urban environments.  Growing urbanisation is increasing the pressure on stormwater infrastructure and growing the risk and effects of flooding. Increasing magnitude and frequency of rainfall events is only putting more pressure on flood protection infrastructure and stopbank infrastructure is crumbling under the pressure. Urban environments are requiring a larger level of flood protection that the traditional stopbank can provide.  This thesis is an investigation into the role of stopbanks for flood protection in urban river spaces and their effect of the experiential and ecological experience of the river. This investigation, developed through an analysis of the Waiwhakaiho River in New Plymouth, the Waikanae River in Kapiti and the Waipoua River in the Waiarapa informs a redesign of flood protection measures in New Zealand medium sized towns to repair the disconnection of the urban environment to the river.</p>

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