scholarly journals Patterns and forecast of long-term cyclical fluctuations of the water runoff of Ukrainian Carpathians rivers

2017 ◽  
Vol 73 (1) ◽  
Author(s):  
Oleksandr Obodovskyi ◽  
Olga Lukianets
Keyword(s):  
Water Runoff ◽  
Cyclical Fluctuations

scholarly journals СЕЗОННА МІНЛИВІСТЬ БІОГЕННИХ РЕЧОВИН У РІЧЦІ ВОРСКЛА

2014 ◽  
pp. 115-120 ◽  
Author(s):  
Н. І. Авраменко
Keyword(s):  
Seasonal Variability ◽  
Direct Relationship ◽  
Nutrient Content ◽  
Water Runoff ◽  
Biological Processes ◽  
Biological Factors ◽  
Cyclical Fluctuations ◽  
Vital Functions ◽  
Main Factors ◽  
The Impact

Розглядаються основні чинники, що найбільшевпливають на сезонну мінливість біогенних речовин урічці Ворскла. Встановлено, що важливу роль віді-грають природні циклічні коливання водного стоку ійого зарегулювання. Зазначено пряму залежністьміж життєдіяльністю гідробіонтів та сезоннимвмістом біогенних речовин у водоймах. Наведено ре-зультати досліджень із вивчення впливу гідробіологі-чних (фотосинтетичних) процесів та біологічногофактора на коливання значень вмісту біогенних ре-човин. Підкреслюється, що рівень вмісту біогеннихречовин лімітує розвиток біологічних процесів у воді.Визначено, що мінливість біогенних елементів у річ-ковій воді має чітко виражений сезонний характер.Встановлено залежність між величиною водногостоку й розвитком гідробіологічних процесів. Охарак-теризовано евтрофікаційні процеси річки Ворскла, зякої проводився збір агроекологічної інформації. Specified is the main factors that have the greatest impact on the seasonal variability of nutrients in the river Vorskla. Found that an important role is played by the natural cyclical fluctuations in water flow and its regulation of . Specified is a direct relationship between the vital functions of aquatic and seasonal content of nutrients in water bodies . The results of research on the impact of hydrobiological ( photosynthetic ) processes and biological factors on fluctuations in the values ​​of nutrient content . Emphasized that the levels of nutrients limiting the development of biological processes in the water. Determined that the variability of nutrients in river water has a distinctly seasonal. The dependence on the magnitude of water runoff and the development of hydrobiological processes.

The Techno-Bureaucratic Elite and the Entrepreneurial State in Dependent Industrialization

1983 ◽  
Vol 77 (3) ◽  
pp. 569-587 ◽  
Author(s):  
Raymond D. Duvall ◽  
John R. Freeman
Keyword(s):  
Global Economy ◽  
Inverse Relationship ◽  
Formal Model ◽  
The State ◽  
Political Support ◽  
Cyclical Fluctuations ◽  
Industrialization Process ◽  
The Relationship ◽  
Entrepreneurial Role

A common characteristic of dependent industrializing countries is a substantial direct entrepreneurial role for the state. One explanation for this is that in dependent industrializing countries the system of allocation and production has been captured by a key group, the techno-bureaucratic elite. The argument is that this elite lends its political support to the state, in return for the state substituting as entrepreneur in the industrialization process.In this article we analyze the theoretical implications of this explanation of the entrepreneurial state. A formal model is constructed of the relationship between state entrepreneurship, material consequences for the techno-bureaucratic elite, and important domestic and international constraints. We then use deductive methods to analyze the logic of state entrepreneurship. Among other things, we show how cyclical fluctuations in the global economy are reflected in constantly changing levels of state entrepreneurship, and we investigate the consequences of alternative kinds of dependency syndromes for histories of entrepreneurial substitution and for streams of benefits to the techno-bureaucratic elite. It is demonstrated that there is an inverse relationship between the tendencies to reach stable levels of state entrepreneurship and the long-term potential for economic growth.

scholarly journals FORECAST ESTIMATES OF WATER RUNOFF OF RIVERS OF UKRAINE ON THE BASIS OF STOCHASTIC PATTERNS OF ITS LONG-TERM FLUCTUATIONS

2021 ◽  
pp. 18-29
Author(s):  
O.I. Lukianets ◽  
◽  
O.G. Obodovskyi ◽  
V.V. Grebin ◽  
S.O. Moskalenko ◽  
...  
Keyword(s):  
Water Runoff

scholarly journals SURFACE MELT WATER RUNOFF ON THE ARABLE LANDS OF THE LOWER DON

2021 ◽  
Author(s):  
D. P. Sidarenko ◽  
Keyword(s):  
Agricultural Land ◽  
Arable Land ◽  
Water Runoff ◽  
Erosion Processes ◽  
Rostov Region ◽  
Melt Water ◽  
Runoff Rate ◽  
The Impact ◽  
Term Data

Purpose: to study the indicators of melt water runoff from arable land of various compaction and to assess its quantitative and qualitative characteristics based on long-term data. Materials and methods. Studies of the intensity of melt water runoff were carried out in the Azov zone of Rostov region in the period 1964–2018 by a number of researchers, including the author of the article. Results. The runoff indicators for a 55-year period are characterized by significant fluctuations. Analysis of long-term data revealed that the indicator of melt water runoff rate from loose arable land for the period 1964–2018 averaged 9.0 mm/year and on compacted arable land averaged 17.5 mm/year. On loose arable land, the maximum runoff rate for a 55-year period is 25.3 mm, on compacted arable land it is 47.3 mm. As a result of the analysis of the data, it was revealed that the average water reserve in snow on the surface of the fall-plowed land is 43.7 mm, and 48.7 mm on the winter wheat sowing. In general, for two agrophonies, the runoff indicator for the period 1964–2018 was most often characterized as weak and very weak only on loose arable land. Calculations of statistical indicators of runoff data revealed that they are not uniform, for example, the coefficient of runoff variation from loose arable land was 115.4 %, and from compacted arable land 70.4 %, with a coefficient of variation above 33 %, the aggregate is considered heterogeneous. Rostov region, having a large agricultural potential, is experiencing significant problems from the impact of negative natural processes, among which one of the first places belongs to erosion processes. Conclusions. In the course of generalization of long-term data on melt water runoff from arable land of varying degrees of compaction, indicators that made it possible to plot the flow availability curves were obtained. The use of the results obtained makes it possible to predict the occurrence of runoff of various intensities and thereby prevent its negative impact on agricultural land with the minimal material costs.

scholarly journals Water Quality in the Volga Estuary as a Reflection of the Current Water/ economic Activity on the River Catchment Territory

2018 ◽  
Author(s):  
Keyword(s):  
Petroleum Products ◽  
Water Runoff ◽  
Wastewater Disposal ◽  
Factors Affecting ◽  
Suspended Substances ◽  
Current Water ◽  
Treatment Facilities ◽  
Carry Over ◽  
Service Data

The work was carried out according to Rosgosstat and Rosgidromet Service data for the period of 1990-2015. The analysis showed a clearly expressed tendency to reduce water consumption and wastewater disposal of various categories in surface water bodies in general for the whole catchment area of the Volga. Short stretches of stabilization or growth in the late 1990s, in the early and second half of the 2000s, in certain years of the 2010s sometimes interrupted the above trends. Reduction of pollutant discharges by 2-6 times in most parameters (organic matter, suspended substances, phenols, nitrites, ammonium and phosphates, copper, and zinc) was combined with proportional growth of discharges of nitrates. The connections of some hydro/chemical parameters in the Verkhneye Lebyazhye meter section (mean annual concentrations of oil products and copper, maximum and, less obviously, average annual concentrations of phenols) have been identified with the entry of certain pollutants with certain categories of wastewater. The volumes of removal from the runoff of the Volga of biogenic and polluting substances are determined largely by the water content of the year. Compounds of phosphorus and copper, petroleum products, organic substances, phenols tend to reduce carry-over since 1996. The total removal of nitrates demonstrates the closest correlation with water runoff, but at the same time a certain asynchrony with its long-term tendency. The main factors affecting the long-term variability in the intake of nitrates (growth since the second half of the 1990s) and their removal together river runoff are technological shortcomings in the work of the bulk of treatment facilities on the Volga catchment and diffuse sources.

scholarly journals Hydrological and suspended sediment regime in the Kolubara River during the extreme year of 2014

2016 ◽  
Vol 18 (1) ◽  
pp. 32-46 ◽  
Author(s):  
Slavoljub DRAGIĆEVIĆ ◽  
Nenad ŽIVKOVIĆ ◽  
Ivan NOVKOVIĆ ◽  
Ana PETROVIĆ ◽  
Radislav TOŠIĆ ◽  
...  
Keyword(s):  
Suspended Sediment ◽  
Water Discharge ◽  
Suspended Sediment Transport ◽  
Water Runoff ◽  
Sediment Discharge ◽  
Daily Discharge ◽  
Large Water ◽  
Climate Events ◽  
Large Discharge

The previous methodology of sampling and determining the suspended sediment con­cen­tration (SSC) in the rivers of Serbia is characterized by a number of disadvantages, so that any re­search of this kind has a large water management impact. In the largest number of hydrological stations in Serbia, daily SSC were obtained based on only one sampling, which raises the question of the representativeness of such sample. Previous SSC – water discharge relationship and detailed analyses of errors in calculating the suspended sediment transport on the profile of Draževac were done for the year of 2004, when the annual difference was very high, which required a very detailed ana­lysis and methodological improvements. In order to define the sediment regime in the Kolubara River, precise monitoring of SSC has been implemented since 2013. The Kolubara River has an unfavourable water regime which is reflected in the excessiveness of water runoff, with floods that are sudden, expressive and short-term, and long-term low waters, so, that are why it is cha­rac­terized by a large discharge and SSC variability. Incidentally, monitoring also covered the year of 2014, when the area of western Serbia (in particular the Kolubara River Basin) was under the influence of extreme climate events that strongly reflected on the hydrological condition with the absolute highest daily discharge. A total of 220 water samples were collected on Draževac gauging station in 2014, in order to determine SSC and sediment discharge. The total number of days covered was 206, which means that there were even more samplings per day, when the discharge was changing fast. The minimal daily measured SSC was only 0.0016 g/l and the maxi­mal recorded value of SSC was 2.6122 g/l and was measured in May at the water discharge of 1 260 m3/s. Тhe total amount of sus­pended sediment discharge at the profile of Draževac in 2014 was 1 104 435 t (the spe­ci­fic suspended sediment yield – 308 t/sqkm/yr). The main objective of this study is to improve SSC – water discharge relationship in the Kolubara River based on the extreme hydrological conditions in 2014.

scholarly journals INFLUENCE OF ATMOSPHERIC PRECIPITATIONS ON THE RUN OF THE PUTIL RIVER

2021 ◽  
Vol 51 (2) ◽  
pp. 24-29
Author(s):  
Yuriy Yushchenko ◽  
Olha Palanychko ◽  
Mykola Pasichnyk ◽  
Oleksandr Zakrevskyi
Keyword(s):  
Climate Change ◽  
Water Balance ◽  
River Runoff ◽  
Annual Runoff ◽  
Water Runoff ◽  
Long Term Changes ◽  
Annual Distribution ◽  
The Village ◽  
Average Annual Precipitation

Research of precipitation, water balance of river basins, and the impact of precipitation on river runoff remain relevant in the context of global and regional climate change. Nowadays, many scientific research all over the world are devoted to the research of the problem of river runoff change under the influence of climatic factors. This kind of research has been developing strongly in Ukraine in recent decades. In particular, they concern the rivers of the Ukrainian Carpathians. The basin of the river Putyla to the line of the village of Putyla has an area of 181 km2. It is located in the south-eastern part of the Carpathian and characterized by a significant influence of warm rains on the formation of water runoff. The average annual runoff is characterized by rather complex patterns of change both in time and space. There are periodic, cyclical and unidirectional changes that occur under the influence of a complex system of factors. Climate is a major factor of the water change. Thus, the research of the average runoff of the Putila River has different aspects.To determine the effect of precipitation on river runoff, the method of comparing difference-integral curves of annual runoff and precipitation, as well as water-balance methods are used. Long-term changes and intra-annual distribution of precipitation, in particular rainfall, according to the observations of the meteorological station Selyatyn were analyzed. We constructed a differential integrated curve of modular coefficients of the average annual precipitation in the Putil district. It clearly reflects the cyclical changes in precipitation. Long-term changes and intra-annual distribution of water runoff in the Putyla River also were analyzed. During the observation period, periods of long-term fluctuations of the average annual precipitation were revealed. The average annual rainfall is 842.9 mm. The annual course is stable, ie the greatest amount of precipitation falls in the summer, when there are intense thunderstorms and showers, the least – in winter. Based on the data of hydrological observations, the average long-term value of water consumption according to GP Putila is 2.47 m3/s. We calculated the coefficient of variability (variation). The coefficient of variation for average costs is 0.21 (21%), and for precipitation – 0.7 (7%). The connection between precipitation and runoff was established. We have built a comprehensive schedule of annual distribution of precipitation and costs of the Putyla River for 2010. You can see that in the spring due to snowmelt there is an influx of water and there is a spring flood. It is known that 2010 in Putilsky district was full of water. The reduction of water consumption in the Putyla River in the cold period of the year with a decrease in precipitation is also observed. Graph of the dependence of the runoff of the Putyla River on precipitation in the village of Selyatyn showed a fairly clear relationship between the variable values of runoff and precipitation (the coefficient of variation is 0,66). The feeding structure of the Putyla River is mixed. The main share is occupied by rain, less - snow and groundwater. Key words: climate change, precipitation, runoff, rivers, long-term changes in runoff, intra-annual distribution of precipitation and runoff, Putyla river.

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