Vladimir Konovalov | Institute of Geography, Moscow, Russia (original) (raw)

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Papers by Vladimir Konovalov

Proceedings of the NATO Research Workshop on natural disaster and water scarcity, 2007

Glaciers located in the upstream of Amudarya river basin amount nearly 78% from total their area ... more Glaciers located in the upstream of Amudarya river basin amount nearly 78% from total their area in the Aral Sea basin. Long term regime of glaciers seasonal melted output during 1935-1993 was computed by means of author's model REGMOD. For this computation total number of glaciers inside of the considered region was divided on 138 groups. Further were estimated empirical integral function probabilities distribution of seasonal total melting in the each group and averaged for all groups value of this function for the each year. Finally were determined, high and low water years on total glaciers melting. Spatial distribution this important parameter of glaciers regime over the upstream of Amudarya river basin was described in extreme and average years. It was revealed that spatial variability of total glaciers melting volume V M is most variable in average years and not significant in minimal and maximal years. This is most important for stabilizing balance between inflow and outflow from water reservoirs supplied hydropower and agriculture. Regional dependencies of V M in extreme years from longitude and latitude are closely related to the spatial distribution of the firn boundary averaged for glacier groups.

Journal of Siberian Federal University. Engineering & Technologies

GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY, 2011

Schematic maps of spatial distribution of seasonal precipitation amounts and average air temperat... more Schematic maps of spatial distribution of seasonal precipitation amounts and average air temperatures were obtained for the areas studied in years with normal and extreme values of annual river runoff. Data on precipitation for January-December (I-XII) and on average air temperatures for June-September (VI-IX) during 1961-1990 collected at 93 meteorological stations located along 30.20°-44.08°N and 67.20°-82.98°E, altitude 122-4 169 m above sea level, were used in the maps' compilation. For each pointelement (i.e. a meteorological station with proper data), the ordinates of an integral empirical function of distribution of probabilities P were calculated from these data for a 30-year sample period and for each year were received average values and standard deviations of P. In characteristic years were revealed, significant differences of spatial distribution of climatic factors and runoff. It was found out also that the spatial distribution of the total volume of glaciers melting is less variable in the years with extreme water yields compared to the average years. This peculiarity is very beneficial for hydropower and agriculture sectors because it provides additional natural ability to stabilize water balance of reservoirs. Piecewise multi-factor linear equations were obtained to calculate the statistical probability of glaciers' total melting in low and high flow years as a function of geographical coordinates and the average altitude of firn boundary.

Eos, Transactions American Geophysical Union, 2000

Examples of determination on the spectral albedo of glacier surface were obtained, using ENVI sof... more Examples of determination on the spectral albedo of glacier surface were obtained, using ENVI software and remote sensing data from Landsat 7 ETM + and Terra satellites. The paper contains estimates of moraine cover change and data on the surging glaciers within of the Pamir area.

Russian Meteorology and Hydrology

The variability of the main components of the annual water balance (precipitation, evaporation, g... more The variability of the main components of the annual water balance (precipitation, evaporation, glacial alimentation, and dynamic water reserves in the basin) for 1935-1990 is, for the first time, determined for the area where the Zeravshan runoff is formed, higher than hydrological post Dupuli is located. Long-term data on the annual Zeravshan River runoff from an area of 10 200 km 2 were derived from the measurements at Dupuli hydrological post. The other water balance components were determined with the help of computation methods. Comparison of the measured and calculated volumes of the annual runoff demonstrated that a relative difference between them is systematic, and as a whole for a computation period it is in the interval from-0.31 to-4.78%. The annual balance of accumulation and thawing of solid precipitation on glaciers and in the extraglacial area is also determined in the Zeravshan River basin. A new method for computing and mapping spatial variability of the maximum snowline altitude is developed.

GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY, 2015

GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY

Measurements of summer mass balance Bs, made over the period 1946- 2016, on 56 continental glacie... more Measurements of summer mass balance Bs, made over the period 1946- 2016, on 56 continental glaciers, located in the basins of mountain rivers in 14 countries, were analysed for the purpose of resolving several tasks: (a) constructing physically based interrelations between river flow Wbas and Bs ; (b) estimating the representativeness of local measurement of Bs for enhancement of hydrological computations and for control of modelled values Wbas; and (c) use of time series of Bs for the evaluation of norms and extrema of Wbas. Results of the study of the outlined problem serve as the basis for making the transition of local glaciological characteristics to the basin-wide level by using the relationship between runoff and summer balance of glaciers. It includes also analysis and conclusions on the spatial and temporal homogeneity of averaging glaciological mass balance data by the sampling method.