טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
Ph.D Thesis
Ph.D StudentTokarev Dmitry
SubjectDevelopment of Hydrodynamic Model for Managing Water Supply
Reservoirs
DepartmentDepartment of Civil and Environmental Engineering
Supervisors Professor Hillel Rubin
Professor Avi Ostfeld
Full Thesis text - in Hebrew Full thesis text - Hebrew Version


Abstract

The objective of the research, which is summarized in this thesis, is to develop a hydrodynamic-biological 3D modeling method aiming at improving water quality in reservoirs. In order to make the outcome of this study applicable and relevant to practical issues, the research tasks refer to Eshkol Operational Reservoir of the National Water Carrier, which is located in the Netofa Valley.

This study concerns the hydrodynamics and biology-chemistry of drinking water reservoirs. It refers to physical phenomena and their effects on chemical and biological processes, which are connected with conservation and improvement of the quality of the reservoir drinking water.

The analysis of the hydrodynamics and biology-chemistry of the reservoir water provides the quantitative description of all processes mentioned above. Generally, the hydrodynamics of the reservoir is focused on flow processes and their influence on the transport of sediments and dissolved materials, and the development of biological species. The flow field existing in the reservoir is mainly influenced by three basic parameters: 1) the reservoir geometry, 2) water balance of water entrances, exits and reservoir volume changes, and 3) speeds and directions of the winds taking place on top of the reservoir. The development of various biological species in water reservoirs depends on the flow field and the following biochemical parameters: 1) initial concentration of sediments and existing biological species, 2) climatic conditions in the reservoir region, and 3) changes in nutrient concentrations resulting from additional inflow, outflow and reservoir bottom re-suspension.

This study incorporates three stages of research activities: 1) development of a 3D numerical model, which fits a water reservoir in which water surface level is subject to significant changes during the day and the week; the model is based on well-established models to which we have added various specific chapters and subroutines, 2) carrying out field measurements and experiments, which have been needed  for the calibration and verification of the numerical model; field measurements have been done by using various types of floats inserted from a moving boat equipped with a GPS, and 3) development of a numerical model, which integrates the hydrodynamics with biological-chemical processes taking place in the drinking water reservoir.