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Is devoted to the cherished memory of Professor Otar Solomonia
The part of potential (theoretical) energy of the river flow, which in practice is used to receive electric energy, is referred to as technical waterpower potential of the river or its separate section, while the technical hydro power resource with the capacity not exceeding 10 MW is referred to the small (non-traditional) hydro power technical potential. As a rule, such capacity is utilized by the diversion type of hydro plants operating in the regime of no regulated discharge and according to the classification adopted in Georgia are referred to small hydro power plants. 
With the availability of the developed schemes for the energy utilization of rivers for power production, the technical potential of the river (separate section of the river) is determined by elementary summation of the capacity and generated electricity of the hydro power plants, while in the absence of the schemes for the utilization of the river for power production (unexplored river) the technical potential is calculated by the indirect route, using so-called coefficient of utilization of the potential energy of the river “K” defined as ratio of the technical potential of the studied river to the value of its full potential energy.
For the Georgian rivers the “K” value varies within the range of 0, 3-0, 9 and its weighted average value is set equal to 0.503.
In 1992-94 the hydro power technical potential of the big, medium and small Georgian rivers was investigated in the Georgian Scientific Research Institute of Power Engineering and Power Structures under the direction of candidate of technical sciences T. Shvelidze) . The differentiated calculation of the potential was promoted by the existence of lots of schemes for the utilization of the hydro power potential and “K” coefficient values. 
While calculating the technical potential, the release of water from the head unit of the hydro plants to the shallower section  of  the  river  (regulating  releases)  were  taken  into  account  in  order  to  preserve  its ecological balance. With the consideration of the above mentioned conditions the hydro power technical potential of the Georgian small rivers made up 7.8 billion kWh.

Since 1995 the financing of the scientific investigations in this direction stopped and, at present,  due  to  the  absence  of  additional  information,  the  concept  technical  hydro  power potential of the small rivers can be considered as small hydro power technical potential of the Georgian rivers.
However, the analysis of the orographic characteristics of the Georgian rivers shows that the  hydropower  plants  with  the  capacity  not exceeding  10MW could  be  only  built  on  the majority sections of the big and medium rivers, or visa versa some small rivers provide for the construction of the plants with the capacity much exceeding 10 MW. It appears from this, that all those separate sections of each river where the plants with capacity not exceeding 10 MW could be built should be investigated individually and by summing them up determines the small hydro power technical potential of the country.
For the solution of this task, the method of drawing up the simulation models for the utilization of the separate sections of the rivers for power generation and based on it procedure for the  determination of the small hydro power potential is presented in the book. The method is integrated with the orographic characteristics of the rivers (absolute elevations, river length, gradient, average annual discharge, regulating releases). More than thousand sections of the 335 rivers have been examined.

As back as in 1987, academician G.G. Svanidze investigated 319 from 335 rivers and used the obtained results for the estimation of the total potential energy of the Georgian rivers. The rest 16 rivers were identified by the authors based on the investigations of the large-scale maps of Georgia and by means of visual survey of the territory.

Hydrological regimes of the discovered rivers were determined by using rate of surface runoff of the river relating to average height of catchment basin as given in manuals and technical literature.
While  developing  the  simulation  model  of  the  utilization  of  the  river  for  power production, the actual condition of the existing power and irrigative units working on its separate sections (level of reservoir head, mark of energy and irrigative head works, transfer of one river into another) have been considered.
Simulation model of the energy utilization of the separate sections of the 335 rivers for power  generation  and  the  small  hydro  power  technical  potential  calculated  based  on  it  is presented in the form of cadastre. The cadastre characteristics are differentiated in accordance with the administrative districts of Georgia.
The energy and technical indices of the simulation models represent reliable source of information for the development of objective scheme of the energy utilization of any river for power generation.
Along with the authors the group consisting of candidate of science Mr. Jimsher Giorgobiani  (statistical  treatment  of  the  data),  Dr.  Prof.  Grigori  Khelidze,  Mr.  Konstantin Pataraia   (engineer),   Ms.   Tsiuri   Baghashvili   (IT   management),   Ms.   Liana   Garibashvili
(preparation of the Russian and English texts) and Mr. Zeno Madjavariani (preparation of the cadastre for publishing) took part in the development of the cadastre.

The cadastre of small (non-traditional) technical hydro power potential of the Georgian rivers has been developed and published by the Georgian Scientific Research Institute of Power Engineering and Power Structures within the framework of project G-1002 of the International Science and Technology Center (ISTC) with the financial assistance of the US Government.
The authors express their gratitude to Mr. Otar Solomonia, Scientific Coordinator of the project for the tremendous contribution to the cadastre development.
The authors express their thanks to Mr. Justine Norbert, ISTC Executive Director and in his face to all employees of ISTC.

The authors express their sincere gratitude to the ISTC curators Mr. Leon Khorovich and Mr.  Igor  Tyurin  whose  attention  and  thorough  support  in  many  respects  determined  the successful implementation of the project.

The authors express sincere gratitude the project collaborator Mr. Audrey Kniazev (University of Colorado in Denver) for the contribution in project financing and its successful implementation.
In the course of project implementation the authors experienced a great support on the part of Mr. David Zubitashvili, Director of the Georgian Scientific Research Institute of Power Engineering and Power Structures, Deputy Director, Mr. Guram Lekishvili, and Head of the Financial Department, Ms. Maia Kvitsiani.
In the course of project implementation we always took advantage of Ms. Irene Khomeriki’s and Mr. Zurab Sikmashvili’s (the Georgian Office of ISTC) assistance in the solution of the problems.

The cadastre is intended for the design engineers, researchers and other specialists working in the field of the utilization and protection of hydro resources. The cadastre would be a help to the Heads of administrative districts during the assessment of the energy resources security for the small business development in the district.
The authors would accept with gratitude all the comments and recommendations expressed by the readers as they believe that they will raise the scientific-practical level of the book.

Project Manager G-1002
M. Dadiani, candidate of science


Shida Kartli

Samtskhe Javakheti

Samegrelo-Zemo Svaneti




Kvemo Kartli

Mtskheta Mtianeti

Racha Lechkhumi







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