Possible climatic changes of hydrological regime of valley reservoirs

The paper presents the simulation outputs of changes of hydrological characteristics of reservoirs of different kind (changes in residence time and in water column stratification) in case of forecast warming according to the most adverse scenario for Moscow water supply, when annual flow and springflood flow depth decrease.     

Diagnostic modelling of within-water processes in reservoirs

The objectives of diagnostic calculations using mathematical models of reservoirs are formulated. The structure of a box hydrological model GMV-MGU is described, and the results of calculation of daily water balance, internal heat exchange structure, and heat balance of individual areas in the Mozhaisk and Rybinsk reservoirs are given. First results of calculation of variations in mean daily phytoplankton biomass in the near-dam pool of a weakly eutrophic water body in period of spring (diatoms) and summer (blue-green) blooming are presented.     

Adaptation of heat and mass exchange model to the calculation of diurnal water temperature regime in a stratified reservoir

A box model algorithm for heat and mass exchange model for a valley reservoir was adapted for the diurnal calculation of hydrological characteristics. Field observation data were used to obtain an empirical dependence for the calculation of the rate of vertical water mixing of water in a water body. The verification of the new model demonstrated a good quality of calculation for short-term prediction of water temperature. Recommendations are given for the further improvement of the calculation algorithm.     

Adapting a model of heat and mass exchange between a water body and the atmosphere taking into account the effect of shallows: Case study of the Ivankovo Reservoir

The paper is based on a box model of heat and mass exchange with the incorporation of a block for calculating latent heat flux, supplemented by parameterization of heat and mass exchange between shallow water area and the atmosphere. The results of calculation of evaporation from the water area of the Ivankovo Reservoir, with allowance made for more intense evaporation from shallows, are given. The latent heat fluxes from shallow and deep-water zones of the water body are shown to differ, depending on weather conditions and water level; the increase in the evaporated-water volume due to taking into account the shallow-water effect is evaluated.     

The results of the numerical simulation of regime variations in the Mozhaisk and Istra reservoirs for the A2 scenario of global warming

Presented are the results of computation of variations of hydrological characteristics in the reservoirs of different types of the Moscow River water system in the case of the predicted global warming (variations of flowage, of ice thermal regime, and stratification of water column) at the realization of the most adverse scenario for the Moscow water supply consisting in the reduction of the annual runoff layer and the runoff layer during the high-water period.     

Isotope–Geochemical Characteristics of Natural Waters in the Southwestern Part of the Crimean Peninsula

Water Resources - The results of our study show that the natural waters in the southwestern part of the Crimean Peninsula are characterized by a wide range of chemical and isotopic composition. The...     

Assessing the Local Renewable Water Resources in the Crimean Peninsula

Water Resources - Data on annual runoff at 15 gages, reflecting the relatively natural conditions of runoff formation were used to reveal the present-day features of its space and time variations....     

Specific features of the hydrological regime of the Tsimlyansk Reservoir under climate changes in the Don basin

This study is a continuation of a cycle of studies into the effect of Atlantic climate on the hydrometeorological regime of European Russia. In this article, an attempt is made to analyze the effect of climate variations in the Atlantic on the Don basin and the hydrological regime of the Tsimlyansk Reservoir. A new composite index of heat transfer NAAII (North Atlantic Air Interaction Index) is suggested, the use of which enables the explanation of changes that have taken place in the Don basin. Evaporation was evaluated with the bathymetry of the Tsimlyansk Reservoir taken into account, and the water level of 32 m abs. was shown to be critical in the interaction between the reservoir and the atmosphere.