Vassilios A Tsihrintzis | National Technical University of Athens (original) (raw)
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Papers by Vassilios A Tsihrintzis
Hydrology and Water Resource Systems Analysis, 2016
Environmental geology, Nov 25, 2005
North American Water and Environment Congress & Destructive Water, 1996
Contamination from petroleum hydrocarbons spilled from USTs is a concern in urban areas that depe... more Contamination from petroleum hydrocarbons spilled from USTs is a concern in urban areas that depend on shallow unconfined aquifers for their water supply. Studies on the transmissivity and other hydraulic properties of the upper layers of aquifers are most times missing, making the design of groundwater remediation facilities very difficult. This paper describes a methodology to evaluate the accuracy of three analytical methods employed to predict aquifer transmissivity using drawdown data from pump-and-treat remediation sites.
Environmental Processes, Aug 1, 2017
A methodology has been developed and is presented for the economic valuation of Ecosystem Service... more A methodology has been developed and is presented for the economic valuation of Ecosystem Services (ES) provided in the case of restoration of an existing irrigation canal to a riparian corridor-linear park. The application is in an existing canal in Chrissoupolis, North Greece. Using the Contingent Valuation Method (CVM), a survey was conducted through questionnaires and personal interviews in 98 residents in July 2014. The survey results were extracted by two different ways: with the use of the Analytical Hierarchy Process (AHP) and simple statistical analysis. AHP was used in extracting the Willingness to Pay (WTP) for the restoration. Results of simple statistical analysis indicate that residents are willing to pay for the restoration an average of 11.44 € per year per resident or 75,216 € in total. The respective results from the implementation of the AHP method indicated a WTP of 49.45 € per year per resident or 325,000 € in total. This study highlights the need to consider ES and their value in future ecosystem restoration.
WIT Transactions on Ecology and the Environment, May 11, 1998
WIT Transactions on Ecology and the Environment, 1970
North American Water and Environment Congress & Destructive Water, 1996
Oil spilled in the marine environment is subject to a great variety of physical, chemical and bio... more Oil spilled in the marine environment is subject to a great variety of physical, chemical and biological processes, which determine its ultimate fate in the aquatic environment. Many of these processes have been studied in detail, and have been incorporated into computerized environmental fate and assessment modeling programs. Some processes, however, have not been studied in detail and better data on these is required to improve existing oil spill models. In addition, new fossil fuel products, such as oil-in-water emulsions, are rapidly appearing on the market, and need to be tested as to their environmental fate following a potential spill in the ocean. This paper reports on some preliminary results concerning adhesion of a commercial Oil-in-Water emulsion and Fuel Oil #6 onto marine sediments under turbulent conditions.
Engineering Hydrology, 1993
Documentation and description of Andrew's effects on open channels and other hydraulic struct... more Documentation and description of Andrew's effects on open channels and other hydraulic structures in South Dade County, Florida, are presented, based on observations made during field trips to ravaged areas approximately one month after the event. Emphasis is on canal conveyance, navigational obstruction, scour due to surge waves, and damage to hydraulic structures. Based on the collected information, design recommendations are considered to avoid adverse effects or reduce structure damage in the future.
In November 1985 parts of the spillway which controlled the water level in Lake Charleston failed... more In November 1985 parts of the spillway which controlled the water level in Lake Charleston failed during a moderate flood event. The spillway failure resulted in formation of a large 'sinkhole' (scour hole) at the upstream side of the spillway. The sinkhole gradually migrated upstream from the spillway to the diversion channel, which is very close to the dike in several places. The upstream migration of the scour hole formed a deep channel much lower than the original lake bottom. The portion of the old lake outside the side channel reservoir was drained, with the streamflow confined in the new channel. This exposed the pump intake used to supply water to the side channel reservoir and threatened the stability of the side channel reservoir dike. This paper presents the results of a hydraulic study which included field data collection and mathematical modeling to investigate the development of the scour channel and the problems associated with it.
Nucleation and Atmospheric Aerosols, 2016
Current developments on modeling of groundwater flow and contaminant transport and removal in the... more Current developments on modeling of groundwater flow and contaminant transport and removal in the porous media of Horizontal Subsurface Flow Constructed Wetlands (HSF CWs) are first reviewed in a short way. The two usual environmental engineering approaches, the black-box and the process-based one, are briefly presented. Next, recent research results obtained by using these two approaches are briefly discussed as application examples, where emphasis is given to the evaluation of the optimal design and operation parameters concerning HSF CWs. For the black-box approach, the use of Artificial Neural Networks is discussed for the formulation of models, which predict the removal performance of HSF CWs. A novel mathematical prove is presented, which concerns the dependence of the first-order removal coefficient on the Temperature and the Hydraulic Residence Time. For the process-based approach, an application example is first discussed which concerns procedures to evaluate the optimal range of values for the r...
Mediterranean Marine Science, Dec 1, 2003
Journal of Hydraulic Engineering, Mar 1, 2001
Environmental Processes, Jul 26, 2016
Water Resources Management, Jul 22, 2015
Chemical Engineering Journal, May 1, 2018
Water Resources Management, Jan 22, 2016
Science of The Total Environment, Nov 1, 2023
Probability and statistics in hydrology , Probability and statistics in hydrology , مرکز فناوری ا... more Probability and statistics in hydrology , Probability and statistics in hydrology , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی
Hydrology and Water Resource Systems Analysis, 2016
Environmental geology, Nov 25, 2005
North American Water and Environment Congress & Destructive Water, 1996
Contamination from petroleum hydrocarbons spilled from USTs is a concern in urban areas that depe... more Contamination from petroleum hydrocarbons spilled from USTs is a concern in urban areas that depend on shallow unconfined aquifers for their water supply. Studies on the transmissivity and other hydraulic properties of the upper layers of aquifers are most times missing, making the design of groundwater remediation facilities very difficult. This paper describes a methodology to evaluate the accuracy of three analytical methods employed to predict aquifer transmissivity using drawdown data from pump-and-treat remediation sites.
Environmental Processes, Aug 1, 2017
A methodology has been developed and is presented for the economic valuation of Ecosystem Service... more A methodology has been developed and is presented for the economic valuation of Ecosystem Services (ES) provided in the case of restoration of an existing irrigation canal to a riparian corridor-linear park. The application is in an existing canal in Chrissoupolis, North Greece. Using the Contingent Valuation Method (CVM), a survey was conducted through questionnaires and personal interviews in 98 residents in July 2014. The survey results were extracted by two different ways: with the use of the Analytical Hierarchy Process (AHP) and simple statistical analysis. AHP was used in extracting the Willingness to Pay (WTP) for the restoration. Results of simple statistical analysis indicate that residents are willing to pay for the restoration an average of 11.44 € per year per resident or 75,216 € in total. The respective results from the implementation of the AHP method indicated a WTP of 49.45 € per year per resident or 325,000 € in total. This study highlights the need to consider ES and their value in future ecosystem restoration.
WIT Transactions on Ecology and the Environment, May 11, 1998
WIT Transactions on Ecology and the Environment, 1970
North American Water and Environment Congress & Destructive Water, 1996
Oil spilled in the marine environment is subject to a great variety of physical, chemical and bio... more Oil spilled in the marine environment is subject to a great variety of physical, chemical and biological processes, which determine its ultimate fate in the aquatic environment. Many of these processes have been studied in detail, and have been incorporated into computerized environmental fate and assessment modeling programs. Some processes, however, have not been studied in detail and better data on these is required to improve existing oil spill models. In addition, new fossil fuel products, such as oil-in-water emulsions, are rapidly appearing on the market, and need to be tested as to their environmental fate following a potential spill in the ocean. This paper reports on some preliminary results concerning adhesion of a commercial Oil-in-Water emulsion and Fuel Oil #6 onto marine sediments under turbulent conditions.
Engineering Hydrology, 1993
Documentation and description of Andrew's effects on open channels and other hydraulic struct... more Documentation and description of Andrew's effects on open channels and other hydraulic structures in South Dade County, Florida, are presented, based on observations made during field trips to ravaged areas approximately one month after the event. Emphasis is on canal conveyance, navigational obstruction, scour due to surge waves, and damage to hydraulic structures. Based on the collected information, design recommendations are considered to avoid adverse effects or reduce structure damage in the future.
In November 1985 parts of the spillway which controlled the water level in Lake Charleston failed... more In November 1985 parts of the spillway which controlled the water level in Lake Charleston failed during a moderate flood event. The spillway failure resulted in formation of a large 'sinkhole' (scour hole) at the upstream side of the spillway. The sinkhole gradually migrated upstream from the spillway to the diversion channel, which is very close to the dike in several places. The upstream migration of the scour hole formed a deep channel much lower than the original lake bottom. The portion of the old lake outside the side channel reservoir was drained, with the streamflow confined in the new channel. This exposed the pump intake used to supply water to the side channel reservoir and threatened the stability of the side channel reservoir dike. This paper presents the results of a hydraulic study which included field data collection and mathematical modeling to investigate the development of the scour channel and the problems associated with it.
Nucleation and Atmospheric Aerosols, 2016
Current developments on modeling of groundwater flow and contaminant transport and removal in the... more Current developments on modeling of groundwater flow and contaminant transport and removal in the porous media of Horizontal Subsurface Flow Constructed Wetlands (HSF CWs) are first reviewed in a short way. The two usual environmental engineering approaches, the black-box and the process-based one, are briefly presented. Next, recent research results obtained by using these two approaches are briefly discussed as application examples, where emphasis is given to the evaluation of the optimal design and operation parameters concerning HSF CWs. For the black-box approach, the use of Artificial Neural Networks is discussed for the formulation of models, which predict the removal performance of HSF CWs. A novel mathematical prove is presented, which concerns the dependence of the first-order removal coefficient on the Temperature and the Hydraulic Residence Time. For the process-based approach, an application example is first discussed which concerns procedures to evaluate the optimal range of values for the r...
Mediterranean Marine Science, Dec 1, 2003
Journal of Hydraulic Engineering, Mar 1, 2001
Environmental Processes, Jul 26, 2016
Water Resources Management, Jul 22, 2015
Chemical Engineering Journal, May 1, 2018
Water Resources Management, Jan 22, 2016
Science of The Total Environment, Nov 1, 2023
Probability and statistics in hydrology , Probability and statistics in hydrology , مرکز فناوری ا... more Probability and statistics in hydrology , Probability and statistics in hydrology , مرکز فناوری اطلاعات و اطلاع رسانی کشاورزی