scholarly journals Control of Systems of Reservoirs with the Use of Risk Analysis

10.14311/538 ◽  
2004 ◽  
Vol 44 (2) ◽  
Author(s):  
P. Fošumpaur ◽  
L. Satrapa
Keyword(s):  
Risk Analysis ◽  
Flood Control ◽  
Water System ◽  
Water Reservoir ◽  
The Czech Republic ◽  
Run Off ◽  
Hydropower Plants ◽  
Basic Functions ◽  
And Control

A system of reservoirs is usually defined as a system of water management elements, that are mutually linked by inner and outer connections in a purpose-built complex. Combined elements consist of reservoirs, river sections, dams, weirs, hydropower plants, water treatment plants and other hydraulic structures. These elements also include the rainfall system, the run-off system, the ground water system, etc. A system of reservoirs serves many purposes, which result from the basic functions of water reservoirs: storage, flood control and environmental functions. Most reservoirs serve several purposes at the same time. They are so called multi-purposes reservoirs. Optimum design and control of a system of reservoirs depends strongly on identifying the particular purposes. In order to assess these purposes and to evaluate the appropriate set of criteria, risk analysis can be used. Design and control of water reservoir functions is consequently solved with the use of multi-objective optimisation. This paper deals with the use of the risk analysis to determine criteria for controlling the system. This approach is tested on a case study of the Pastviny dam in the Czech Republic.

scholarly journals Reduction of Energy Consumption in Hotels with Aerothermal Energy. Case Study: Canary Islands (Spain)

2018 ◽  
Vol 7 (3.32) ◽  
pp. 127
Author(s):  
Francisco Javier Díaz Perez ◽  
David Chinarro ◽  
M Rosa Pino Otín ◽  
Ricardo Díaz Martín ◽  
Adib Guardiola Mouhaffel
Keyword(s):  
Canary Islands ◽  
Water System ◽  
Heat Pumps ◽  
Hot Water ◽  
Hourly Rate ◽  
The Hours ◽  
Reduction Of Energy Consumption ◽  
Opening And Closing ◽  
And Control

This article presents a management model and control of energy efficiency in hotels adapted to the consumption patterns that ensure the comfort requirements of customers and integrated into the environment of an intelligent tourist complex. The analysis of the hot water system (DHW) of two hotels in the Canary Islands (Spain) in relation to their occupation, yields a solution based on renewable energies using high temperature heat pumps with aerothermal dissipation and supported by boilers of existing LPG propane. The control by programmable automatons (PLC) integrated in a system of control and acquisition of data (SCADA) optimizes the systems to maintain the maximum accumulated energy during the periods of cheapest electric tariff, by means of a system of opening and closing of hydraulic Valves that It manages to adjust the demand of DHW consumption to achieve the highest energy accumulation during the hours with the cheapest electricity tariff. The result after two and a half years of activity registration is a faster return on investment due to the optimized energy management of the system, through the control of operating hours adjusted to the needs of customers and the hourly rate. It has also been predicted that during the estimated 12 years of the system will have saved more than € 1,179,737 and thermal 8,780,005 kWh in a hotel 1 and € 1,315,104 and thermal 9,522,301 kWh in the hotel 2. This model shown can be seen how economically and energetically very efficient.  

scholarly journals Risk Analysis of Reservoir Operations Considering Short-Term Flood Control and Long-Term Water Supply: A Case Study for the Da-Han Creek Basin in Taiwan

Water ◽  
2017 ◽  
Vol 9 (6) ◽  
pp. 424 ◽  
Author(s):  
Wen-Ming Cheng ◽  
Chien-Lin Huang ◽  
Nien-Sheng Hsu ◽  
Chih-Chiang Wei
Keyword(s):  
Risk Analysis ◽  
Water Supply ◽  
Flood Control ◽  
Reservoir Operations ◽  
Short Term

Model-based estimation and control of interface level in a two-phase vertical decanter: A case study of palm-oil/water system

2018 ◽  
Vol 108 ◽  
pp. 372-381
Author(s):  
Wirachai Chonwattana ◽  
Chanin Panjapornpon ◽  
Atthasit Tawai ◽  
Tanawadee Dechakupt
Keyword(s):  
Palm Oil ◽  
Water System ◽  
Two Phase ◽  
Model Based ◽  
Oil Water ◽  
Estimation And Control ◽  
And Control

scholarly journals State forest administration performance in the Czech Republic: A case study of forestry legislation implementation in the South Bohemian Region

2021 ◽  
Vol 67 (4) ◽  
pp. 248-257
Author(s):  
Michal Hrib ◽  
Marcel Riedl ◽  
Petra Hýsková ◽  
Jaroslav Maršík ◽  
Martina Jarkovská
Keyword(s):  
Czech Republic ◽  
Timber Harvesting ◽  
The Czech Republic ◽  
State Administration ◽  
Decision Making Processes ◽  
Forest Act ◽  
Administrative Proceedings ◽  
And Control ◽  
Hunting And Fishing

Abstract In the Czech Republic, the present state forest administration is incorporated into general state administration. Municipalities with extended competence (MECs) as first-instance forest administration bodies thus perform the so-called “mixed” administration. Besides forestry, MECs cumulatively perform hunting and fishing administration, observing several different laws. On an example of three MECs in South Bohemia (České Budějovice, Týn nad Vltavou and Písek), the paper analyses the decision-making processes and control activities concerning the implementation of administrative activity, particularly the Forest Act. The findings show that during the observed period 2011–2015, the most frequently conducted administrative proceedings under the Forest Act involved binding opinions regarding permission for buildings at a distance of fewer than 50 m from the forest and decisions on timber harvesting. Other frequently performed acts somewhat surprisingly concerned issuing licenses for professional forest managers and decisions whether or not the land fulfils forest functions. Based on the findings, the paper also suggests stimuli and suggestions (de lege ferenda) for changes in the Forest Act and other regulations relating to this issue.

scholarly journals The impact of using lead pellets on lead contamination of mallards (Anas platyrhynchos) in the Czech Republic

2013 ◽  
Vol 82 (1) ◽  
pp. 55-59 ◽  
Author(s):  
Zdeňka Hutařová ◽  
Olga Čelechovská ◽  
Vladimír Večerek ◽  
Zdeňka Svobodová
Keyword(s):  
Czech Republic ◽  
Flood Control ◽  
Anas Platyrhynchos ◽  
Absorption Spectrometry ◽  
Lead Contamination ◽  
Limited Information ◽  
Hunting Season ◽  
The Czech Republic ◽  
And Control ◽  
The Impact

The aim of the study was to assess the degree of lead contamination in mallards in the Czech Republic as a result of using lead shots for wildfowling. Two sites used for mallard hunting were chosen, namely a flood-control reservoir in Moravia and a small fishpond in Bohemia. Lead concentrations were determined in the tissues of 20 mallards (Anas platyrhynchos) raised at those standing open water sites (n = 10 at each site) and killed there during the autumn hunting season with a steel shot. Control groups were made up of 20 mallards from the same breeding facility as experimental groups but raised in an enclosure without access to water (n = 10 at each site). Lead concentrations were determined in selected tissues (breast muscle, heart, liver, gizzard, kidney, feathers - quill base, lung, brain and humerus) by high resolution continuum source atomic absorption spectrometry. The results showed elevated lead concentrations in all tissues of mallards compared with control in the reservoir in Southern Moravia. The highest lead concentrations (mg/kg) were found in the humerus (14.254 ± 4.525 and 5.083 ± 0.748 for experimental and control mallards, respectively). In contrast, lead concentrations in mallards from small fishpond in Southern Bohemia were lower compared to control. Similarly, the highest lead concentrations were found in the humerus (2.219 ± 0.349 and 8.930 ± 1.012 for experimental and control mallards, respectively). This study extends very limited information about lead contamination of wild ducks in the Czech Republic in connection with hunting activities.

scholarly journals Risks Analysis and Response of Forecast-Based Operation for Ankang Reservoir Flood Control

Water ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1134 ◽  
Author(s):  
Zhao Liu ◽  
Jiawei Lyu ◽  
Zhifeng Jia ◽  
Lixia Wang ◽  
Bin Xu
Keyword(s):  
Risk Analysis ◽  
Flood Control ◽  
Forecast Accuracy ◽  
Information Collection ◽  
Remedial Measures ◽  
Short Term ◽  
Risk Sources ◽  
Regulation Method ◽  
Flood Regulation

With the improvement of short-term flood forecasting and short-term rainfall forecast accuracy, as well as the advance of hydrological and meteorological information collection and collation methods, the reservoir flood regulation method taking rainfall or inflow forecast into consideration is gaining more and more attention. As the index of Forecast-Based Operation (FBO), the forecasted factor plays an important part in determining success or failure of FBO due to its uncertainty and accuracy. In this study, possible risk sources were analyzed considering the process and the characteristics of reservoir flood regulation firstly, and the uncertainty of the forecast information and the FBO risks were discussed based on hypothesis testing. Then, combined with the case study of applying FBO on Ankang Reservoir, in which the forecasted net rainfall was selected as the index of the FBO rules, the probability distribution of the forecasted net rainfall errors was derived as the basis of risk analysis. Finally, FBO risk analysis was conducted based on Monte Carlo method for several real flood processes, while a simulation was also carried out with the Conventional Operation (CO) for contrast. The results indicate that the maximum risk was reduced more than half when FBO was adopted. Consequently, the possible remedial measures were put forward in the case of invalid forecast happened based on simulation and the analysis of the principle of flood regulation. The conclusions and methods in this research provide ideas for real-time flood regulation and risk management of reservoirs.

scholarly journals Multipurpose Water Reservoir Management: An Evolutionary Multiobjective Optimization Approach

2014 ◽  
Vol 2014 ◽  
pp. 1-14 ◽  
Author(s):  
Luís A. Scola ◽  
Ricardo H. C. Takahashi ◽  
Sérgio A. A. G. Cerqueira
Keyword(s):  
Multiobjective Optimization ◽  
Flood Control ◽  
Electric Energy ◽  
Water Reservoir ◽  
Optimization Approach ◽  
Operation Planning ◽  
Nsga Ii ◽  
Evolutionary Multiobjective Optimization ◽  
Hydropower Plants ◽  
The Cost

The reservoirs that feed large hydropower plants should be managed in order to provide other uses for the water resources. Those uses include, for instance, flood control and avoidance, irrigation, navigability in the rivers, and other ones. This work presents an evolutionary multiobjective optimization approach for the study of multiple water usages in multiple interlinked reservoirs, including both power generation objectives and other objectives not related to energy generation. The classical evolutionary algorithm NSGA-II is employed as the basic multiobjective optimization machinery, being modified in order to cope with specific problem features. The case studies, which include the analysis of a problem which involves an objective of navigability on the river, are tailored in order to illustrate the usefulness of the data generated by the proposed methodology for decision-making on the problem of operation planning of multiple reservoirs with multiple usages. It is shown that it is even possible to use the generated data in order to determine the cost of any new usage of the water, in terms of the opportunity cost that can be measured on the revenues related to electric energy sales.

SIMULATION AND CONTROL OF FLOODS IN A WATER NETWORK. CASE STUDY OF JIJIA RIVER CATCHMENT

2017 ◽  
Vol 16 (3) ◽  
pp. 587-595
Author(s):  
Vasile Mircea Cristea ◽  
Ph.m Thai Hoa ◽  
Mihai Mogos-Kirner ◽  
Csavdari Alexandra ◽  
Paul Serban Agachi
Keyword(s):  
Water Network ◽  
River Catchment ◽  
Simulation And Control ◽  
And Control
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