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11.
The natural-climatic causes of changes in river runoff and seasonal recharge of groundwater in Don basin are considered. Joint
analysis is made of changes in the statistical characteristics of the series of air temperature and precipitation, mean annual
and dry-season-averaged runoff for both the entire observation period and of periods 1940–1969 and 1970–2000 with comparable
durations. The presence of statistically reliable ascending trends in air temperature, precipitation, and dry-season (groundwater)
runoff for period 1970–2005 is demonstrated. Climatic changes in Don basin also have their effect on the formation of extremely
low water in small and medium rivers, including cases of zero runoff. Zoning of the territory by runoff formation conditions
is carried out, and new estimates of natural groundwater resources in Don basin for period 1970–2000 are constructed. Appropriate
maps are compiled. 相似文献
12.
R. G. Dzhamalov N. L. Frolova A. V. Stanovova G. N. Krichevets Chung-Ho Wang Kuo-Chin Hsu Feng-Sheng Chiu Cheng-Haw Lee Ming-Chee Wu 《Water Resources》2012,39(5):610-621
The dynamics of climate and runoff characteristics are studied in the territories of Kamchatka Peninsula and Taiwan Island, which are situated in the influence zone of monsoon circulation. Long-term variations in the temperature, precipitation, and runoff are examined in Kamchatka and Taiwan for the weather and gauging stations with the longest observation series to analyze new climate conditions of water resources generation. 相似文献
13.
Pollution of precipitation is one of the main factors affecting the hydrochemical regime of groundwater. The main factors governing the concentration of macro-and microelements, as well as the degree of acifidication, have been evaluated on the basis of the long-term variability of the hydrochemical regime of groundwater. The results follow from the generalization of the data obtained. Changes in the macro- and microelement concentration in groundwater have been studied, taking into account the chemical composition of rainwater and snow meltwater. 相似文献
14.
R. G. Dzhamalov I. S. Zektser G. N. Krichevets T. I. Safronova L. F. Sotnikova Yu. V. Gromova 《Water Resources》2008,35(1):15-22
Quantitative relationships between groundwater runoff and other water balance components are obtained. These relationships enable the prediction of changes in groundwater nourishment in different natural-geographic zones on the Earth because of global climatic changes and intense anthropogenic impact on the water regime of different areas. Groundwater runoff values (natural groundwater resources) in individual river basins are estimated. Digital maps (grid-models) of the space and time distribution of water balance elements (based on GIS-technology) are constructed for major river basins in European Russia, and river runoff is calculated in each grid node in river basins with a step of 0.1° in geographic coordinates. The values of major water balance components, thus related with one another, serve as the basis for their spatial and temporal analysis and cartographic representation. The proposed method was tested against data on Volga basin where long-term observational data on water balance elements are available in a number of hydrometric sections. 相似文献
15.
Dzhamalov R. G. Mironenko A. A. Myagkova K. G. Reshetnyak O. S. Safronova T. I. 《Water Resources》2019,46(2):188-198
Water Resources - Water quality dynamics along the Northern Dvina River is analyzed under the conditions of anthropogenic impact. Overall, river water is classified as very polluted. The cases of... 相似文献
16.
Analytical and numerical methods are proposed for the calculation of water inflow into construction pits under various geological—engineering and hydrogeological conditions at the construction site. Water inflow into the pit is shown to depend not only on lateral seepage but also on the leakage from underlying aquifers at appropriate parameters of their interaction. Under certain natural conditions, the most efficient method for construction pit draining at low water yield of soils in the construction area are light wellpoint systems, the capacity and layout of which is determined by the potential inflow through the pit contour. The results of analytical and numerical calculations for the assessment of groundwater inflow into a pit are given, and light wellpoint systems are shown to be effective under different combinations of natural and engineering conditions. 相似文献
17.
The effect of climate on the present-day formation conditions of the regimes of annual and base runoff in Eastern Siberia
rivers and changes in those regimes are studied. The significant climate warming in Eastern Siberia in recent decades is shown
to be accompanied by not only an increase in air temperature and some increase in precipitation, but also by a considerable
changes in the annual and seasonal values of river and groundwater runoff. Hydrometeorological data are used to analyze variations
in the mean annual and mean base runoff over the entire observation period divided into subperiods of 1940–1969 and 1970–2005.
Plots, diagrams, and tables are constructed for the most representative gauges. The zoning of the territory by the runoff
formation conditions was carried out and new estimates were derived for total water resources and natural groundwater resources
for 1970–2005 with the construction of maps in ArcMap program. 相似文献
18.
Water Resources - The paper deals with justification of estimates for solutions of groundwater flow equations in the case of incomplete information on soil permeability. In engineering... 相似文献
19.
Proportions of the overland, delayed, and groundwater runoff are given for different phases of the hydrological regimes of rivers under different landscape–climate conditions in Russia. The concept of runoff hydrological regime is in agreement with the formation features of the annual and seasonal runoff on small watersheds under current climate conditions. The increase in winter runoff is due to the impulse discharge regime of soil water and groundwater, which receive additional recharge during frequent thaws and at weak freezing of the aeration zone. Variations in the values of runoff, total precipitation, and mean temperature were shown to be both synchronous and periodic. 相似文献
20.
Dzhamalov R. G. Kosolapov A. E. Vlasov K. G. Myagkova K. G. Reshetnyak O. S. Safronova T. I. 《Water Resources》2019,46(1):S1-S10
Water Resources - The formation and distribution of river flow characteristics in the Don basin have been catholically analyzed, depending on the present-day climatic conditions in the central... 相似文献