Nunu Tsintsadze

The scheme for the assessment of underground runoff of rivers and ground waters‘ storage is discussed, which is based on the application of observation data regarding minimal average monthly runoff in the cold period. The results obtained using this scheme and the assessment as a result of breakdown of hydrograph area compared. Their acceptable coincidence efficiency calculations and objectivity of results are demonstrated. The interconnection between the surface and underground runoff is investigated, along with the peculiarities of dynamics, territorial and internal distribution dependence on the elevation of the terrain, stockpiles of underground waters in Georgia‘s conditions

The investigation results of draughts dynamics over Georgian territory for 1951-2007 year period based on the 49 existed and functioning meteostations for all months of vegetation period (March - September) are presented. The draught intensity assessment is carried out using methodology elaborated at the Agricultural Meteorological Scientific-Research Institute of Russia. This method is based on the integrated application of 3 meteorological (atmospheric) and 2 agrometeorological (soil) indices. The droughtiest stations in Eastern Georgian regions have been ascertained. Those are stations in Kvemo Kartli – Tbilisi and Gardabani; In KakhetiSagarejo, Shiraki and Dedoplistskaro. According to the data of those stations severe and extremely severe draughts were detected repeatedly no less than in 3 vegetation months. The maximal probability in class 2- strong draught was fixed by Gardabani station data - p=0.46, Tbilisi- p=0.30 and Sagarejo – p=0.21, Shiraki and Dedoplistskaro- p=0.16. All of them were registered in August and September. The analysis of variation of draught intensity relevant trends doesn‘t indicate the influence of global warming on the draught dynamics.

The work gives the assessment of the possible cumulative impact of the three water reservoirs of the hydroelectric power plant series present or designed in the river Enguri gorge on the environmental micro-climate. The spatial scales and intensity of the impact of Jvari, Khudon and Nenskra water reservoirs on the air temperature and humidity are identified by using the analytical solution of a two-dimensional stationary mathematical model of turbulent heat exchange and moisture circulation on the background of the horizontal wind given in the surface atmosphere. Assessment of the cumulative effect of the water reservoirs on the environment is made by superpositioningof the analytical solutions gained for each of the water reservoirs, i.e. the values of the impact effects of the three water reservoirs are summed up at every point of space. The possible cumulative impact of the series of water reservoirs on the regimes of wind and atmospheric precipitations is also assessed.  The gained results suggest that any significant change in temperature or humidity may occur only in up to 5 km from the water reservoir coastline, in the wind direction. The impact of the series of the water reservoirs on the atmospheric precipitations and wind values is insignifican Thus, no significant changes in the climate of the region are expected as a result of the cumulative impact of the series of the water reservoirs.

The seismic and hydrometeorological risks of the possible damage to the designed Nenskra hydroelectric power plant dam are considered. The dam stability criterion is gained, and its analysis is used to show the insignificant role of hydrometeorological processes (strong rain, flashflood, flood) as compared to the seismic risk. The fault line running in the given region may impact the dam stability. It is characterized by earthquakes with the magnitude of M=5; 2,5and 10% probability for a 50-year-long period.  By admitting the total disintegration of the dam, the peak discharges of the originated flashflood wave are calculated on the fault site and along the river transit areas. For instance, the wave discharge at KHUDONHESI (Khudon hydroelectric power plant) dam may reach the value of 7x10⁴m³/sec. The time taken by the flashflood to cover the distance from the Nenskra dam to Khudon dam is approximately 1 hr. The work states that such a scenario of events may have an extremely negative impact on the beds of the Nenskra and Enguri river beds and settled areas near them, and Khudon hydroelectric power plant dam and water reservoir will be under the hazard of damage

The dynamics of glaciers of the Caucasus Range based upon the observational data 1850-1890, 1910-1933, 1960-1965, 1970-1995 and 2002-2005 is studied. In most cases, the linear trend of decreasing the area of ​​glaciers is revealed. The rate of degradation of glaciers is assessed. According to climate forecast in case of maintaining the intensity and the current global warming the Caucasus Range would be completely free of ice to the 2150-2160

The extremely heavy precipitation event probability is assessed on the basis of monthly weather records. Case study is conducted for Georgia’s Black Sea coastal region. Risk calculated values are verified applying data on observed patterns of precipitation.

The article provides mathematical model for changing and calculating glacial nutrition rivers runoff (warm period) related to climate change, estimating based on climatic conditions (precipitation, air temperature and total discharge), as well as analyzing basin K - discharge coefficient.

Doctoral Thesis Referee

Master Theses Supervisor

Doctoral Thesis Supervisor/Co-supervisor

Scientific editor of monographs in foreign languages

Scientific editor of a monograph in Georgian

Editor-in-Chief of a peer-reviewed or professional journal / proceedings

Review of a scientific professional journal / proceedings

Member of the editorial board of a peer-reviewed scientific or professional journal / proceedings

Participation in a project / grant funded by an international organization

Participation in a project / grant funded from the state budget

Patent authorship

Membership of the Georgian National Academy of Science or Georgian Academy of Agricultural Sciences

Membership of an international professional organization

Membership of the Conference Organizing / Program Committee

National Award / Sectoral Award, Order, Medal, etc.

Honorary title

Monograph

Handbook

Research articles in high impact factor and local Scientific Journals

Publication in Scientific Conference Proceedings Indexed in Web of Science and Scopus