scholarly journals Conditions of forming and factors of water regime of the Poltva River

2012 ◽  
Vol 2 (40) ◽  
pp. 52-59
Author(s):  
L. Kurhanevych ◽  
M. Shipka
Keyword(s):  
Key Words ◽  
Water Regime ◽  
Water Discharge ◽  
Hydrological Regime ◽  
River System ◽  
Natural Conditions ◽  
Discharge Water ◽  
Long Term Changes ◽  
History Of

The analysis of water regime of the Poltva River system has been carried out. History of hydrological investigations, hydrological regime parameters, trends of the long-term changes of hydrological regime in XX-XXI centuries have been characterized. Natural conditions and man-made factors of the river water regime forming have been analyzed. Key words: water regime, hydrological post, water discharge, water level.

Long Term Monitoring of the Macrobenthos of the Upper Clyde Estuary

1984 ◽  
Vol 16 (5-7) ◽  
pp. 359-373 ◽  
Author(s):  
Anne R Henderson
Keyword(s):  
Water Quality ◽  
Seasonal Variation ◽  
Organic Pollution ◽  
Long Term Changes ◽  
Pollution Loading ◽  
Faunal Density ◽  
History Of ◽  
Long Term Monitoring ◽  
Term Monitoring

The sublittoral macrobenthic invertebrate populations of the Upper Clyde Estuary are described. The estuary has a long history of organic pollution. The long term changes in species composition, faunal density and dominance patterns between 1974 and 1980 are presented. The fauna is dominated by brackish, pollution tolerant oligochaetes and polychaetes. Fluctuations in populations can be related to both seasonal variation in environmental conditions and long term improvements in water quality through a reduction in pollution loading to the estuary.

scholarly journals Long-term changes of river discharge regime in Latvia

2008 ◽  
Vol 39 (2) ◽  
pp. 133-141 ◽  
Author(s):  
Maris Klavins ◽  
Valery Rodinov
Keyword(s):  
Climate Variability ◽  
River Discharge ◽  
Water Resource Management ◽  
Regional Climate ◽  
Hydrological Regime ◽  
High Water ◽  
Regime Changes ◽  
Long Term Changes ◽  
Discharge Regime

The study of changes in river discharge is important for regional climate variability characterization and for development of an efficient water resource management system. The hydrological regime of rivers and their long-term changes in Latvia were investigated. Four major types of river hydrological regimes, which depend on climatic and physicogeographic factors, were characterized. These factors are linked to the changes observed in river discharge. Periodic oscillations of discharge, and low- and high-water flow years are common for the major rivers in Latvia. A main frequency of river discharge regime changes of about 20 and 13 years was estimated for the studied rivers. A significant impact of climate variability on the river discharge regime has been found.

The history and future of the North Sea benthos

1978 ◽  
Vol 76 (1-3) ◽  
pp. 193-200
Author(s):  
P. E. P. Norton
Keyword(s):  
North Sea ◽  
Bottom Type ◽  
The North ◽  
Late Tertiary ◽  
Long Term Changes ◽  
History Of ◽  
The North Sea ◽  
Temperature Depth

SynopsisThis is a brief review intended to supply bases for prediction of future changes in the North Sea Benthos. It surveys long-term changes which are affecting the benthos. Any prediction must take into account change in temperature, depth, bottom type, tidal patterns, current patterns and zoogeography of the sea and the history of these is briefly touched on from late Tertiary times up to the present. From a prediction of changes in the benthos, certain information concerning the pelagic and planktonic biota could also be derived.

Long-term changes in the benthic communities of the Sea of Azov related to the sedimentation and hydrological regime

Oceanology ◽  
2008 ◽  
Vol 48 (3) ◽  
pp. 390-400 ◽  
Author(s):  
G. G. Matishov ◽  
I. V. Shokhin ◽  
M. V. Nabozhenko ◽  
V. V. Pol’shin
Keyword(s):  
Benthic Communities ◽  
Hydrological Regime ◽  
Sea Of Azov ◽  
The Sea Of Azov ◽  
Long Term Changes

scholarly journals Long-term Changes in the Central Amygdala Proteome in Rats with a History of Chronic Cocaine Self-administration

Neuroscience ◽  
2020 ◽  
Vol 443 ◽  
pp. 93-109
Author(s):  
Peter U. Hámor ◽  
Mariola J. Edelmann ◽  
Christina Gobin ◽  
Marek Schwendt
Keyword(s):  
Central Amygdala ◽  
Self Administration ◽  
Chronic Cocaine ◽  
Long Term Changes ◽  
History Of

Long-term changes in fish mercury levels in the historically impacted English-Wabigoon River system (Canada)

2012 ◽  
Vol 14 (9) ◽  
pp. 2327 ◽  
Author(s):  
Margaret R. Neff ◽  
Satyendra P. Bhavsar ◽  
George B. Arhonditsis ◽  
Rachael Fletcher ◽  
Donald A. Jackson
Keyword(s):  
River System ◽  
Long Term Changes

scholarly journals Colour and form

2018 ◽  
Vol 11 (2) ◽  
Author(s):  
Camilla Gåfvels
Keyword(s):  
Empirical Data ◽  
Analytical Approach ◽  
Local History ◽  
Educational Activity ◽  
Multiple Sources ◽  
Upper Secondary ◽  
Long Term Changes ◽  
History Of ◽  
Verbal Analysis

This article investigates how expressions of vocational knowing regarding colour and form changed in Swedish upper secondary floristry education between 1990 and 2015. An analytical approach is used which falls within the framework of a sociocultural interpretation of educational activity. During the period studied, subject matter related to colour and form became increasingly formalised. Empirical data was obtained from multiple sources, including two interviews with an experienced senior teacher, which helped to reveal the local history of a leading Swedish floristry school. The findings of the article are as follows: (i) conceptualisation, verbal analysis and reflection have gained prominence in Swedish floristry education since the 1990s, and (ii) these tools have increasingly served to help participants in education make and express aesthetic judgements. Through a discussion of various aspects of contemporary Swedish floristry education, the article illuminates the complexity of long-term changes in vocational knowing.

scholarly journals Feasibility of evaluation of the natural history of kidney disease in the general population using electronic healthcare records

2020 ◽  
Author(s):  
Faye Cleary ◽  
David Prieto-Merino ◽  
Sally Hull ◽  
Ben Caplin ◽  
Dorothea Nitsch
Keyword(s):  
Chronic Kidney Disease ◽  
Kidney Disease ◽  
General Population ◽  
Natural History ◽  
Sufficient Information ◽  
Long Term Changes ◽  
History Of ◽  
Method Of Evaluation ◽  
Changes Over Time

Abstract Background Knowledge about the nature of long-term changes in kidney function in the general population is sparse. We aim to identify whether primary care electronic healthcare records capture sufficient information to study the natural history of kidney disease. Methods The National Chronic Kidney Disease Audit database covers ∼14% of the population of England and Wales. Availability of repeat serum creatinine tests was evaluated by risk factors for chronic kidney disease (CKD) and individual changes over time in estimated glomerular filtration rate (eGFR) were estimated using linear regression. Sensitivity of estimation to method of evaluation of eGFR compared laboratory-reported eGFR and recalculated eGFR (using laboratory-reported creatinine), to uncover any impact of historical creatinine calibration issues on slope estimation. Results Twenty-five per cent of all adults, 92% of diabetics and 96% of those with confirmed CKD had at least three creatinine tests, spanning a median of 5.7 years, 6.2 years and 6.1 years, respectively. Median changes in laboratory-reported eGFR (mL/min/1.73 m2/year) were −1.32 (CKD) and −0.60 (diabetes). Median changes in recalculated eGFR were −0.98 (CKD) and −0.11 (diabetes), underestimating decline. Magnitude of underestimation (and between-patient variation in magnitude) decreased with deteriorating eGFR. For CKD Stages 3, 4 and 5 (at latest eGFR), median slopes were −1.27, −2.49 and -3.87 for laboratory-reported eGFR and −0.89, −2.26 and −3.75 for recalculated eGFR. Conclusions Evaluation of long-term changes in renal function will be possible in those at greatest risk if methods are identified to overcome creatinine calibration problems. Bias will be reduced by focussing on patients with confirmed CKD.

scholarly journals The analysis of the channel deformations in the lower pool of the Votkinsk reservoir

2020 ◽  
Vol 163 ◽  
pp. 06005
Author(s):  
Svetlana Dvinskikh ◽  
Dmitriy Klimenko ◽  
Olga Larchenko ◽  
Konstantin Minkin
Keyword(s):  
Discharge Rate ◽  
Water Discharge ◽  
Lower Pool ◽  
Hydroelectric Station ◽  
Hydrological Regime ◽  
Growth Cycle ◽  
Low Flow ◽  
Channel Deformations ◽  
Sand And Gravel

The sand and gravel mix is mined at the Votkinsk reservoir. This leads to horizontal and vertical channel deformations. To study them, we examined the Golyanovsk section of the sand and gravel mix (SAGM) field in the lower pool of the reservoir. We used the channel surveys made in 2012-2016, 2018 and 2019 as the source of cartographic materials. The lower pool section of the Votkinsk hydroelectric complex, within which the Golyanovsk SAGM field is located, is characterized by a fully regulated effluent and an unsteady hydrological regime. Therefore, the hydrological regime of the considered area is particularly complex and depends on the water consumption in the alignment of the Votkinsk hydroelectric station and the level of the Nizhnekamsk reservoir. The average long-term water discharge for the navigation period is 2200 m3/s, the average long-term minimum monthly discharge rate is 1800 m3/s. The field survey of the area was carried out during the low water period in accordance. This period was characterized by minimum levels at around 64.79-65.24 m BS. The water discharge varied between 1720-1780 m3/s. With this flow, the Kama River is characterized by fairly low flow speed: no more than 1.29 m/s on the rod and 0.2-0.5 m/s on the riverbank shallows. The channel deposits are represented by pebble-gravel soils of various sizes. Throughout 2001-2019 an increase in the particle size has occurred. This is due to the change of the channel-forming process from accumulation to erosion. Horizontal deformations are represented by the reformation of the riverbanks, vertical – by accumulation and erosion of bottom. Drawdown levels are the result of natural deformations of the channel. According to the monitoring data, the duration of the “drawdown – growth” cycle is 2-3 years. The duration of the “drawdown – growth” cycle is 2-3 years.

Sign in / Sign up

Export Citation Format

Share Document