Flora and Vegetation of the Small Rivers of the Pregolya River System in the Kaliningrad Region

2017 ◽  
pp. 385-410 ◽  
Author(s):  
A. A. Volodina ◽  
M. A. Gerb
Keyword(s):  
River System ◽  
Small Rivers ◽  
Kaliningrad Region

scholarly journals CONTRIBUTION OF LARGE RIVER SYSTEM ON WATER LEVEL DUE TO A STORM

2018 ◽  
pp. 14
Author(s):  
Abdul Al Mohit ◽  
Yoshihiko Ide ◽  
Mitsuyoshi Kodama ◽  
Masaru Yamashiro ◽  
Noriaki Hashimoto
Keyword(s):  
Water Level ◽  
Water Discharge ◽  
Interaction Model ◽  
River System ◽  
Large River ◽  
Water Levels ◽  
Sea Surface ◽  
Surface Elevation ◽  
Small Rivers ◽  
Open Boundary

Bangladesh is a riverine country in South Asia, which contain about 700 big or small rivers. The major Ganges- Brahmaputra-Meghna river system makes the coast of Bangladesh more complex and disaster vulnerable area. This river system may or may not have its impact on the height of the water level due to a storm. This area is a suitable place for research, but there is no such mention of suitable research conducted in this area. Worth mentioning works done by some scholars are Dube et al. (2004), Agnihotri et al. (2006). All the works are important to the Bay-River interaction for the storm surge simulation, but these studies were also limited by the lack of a representation of proper geometry of the river system. Some of them considered idealized river system with constant water depth and some of them did not consider the proper tidal resume. The present study is a step towards the development of an operational surge forecasting nonlinear Bay-River interaction model that incorporates the major river system with realistic geometry. Both the bay and river model equations are discretized by finite difference method with central in space and forward in time and are solved by a conditionally stable, semi-implicit manner on a staggered Arakawa C-grid system. A stable tidal condition was made by forcing the sea level with the most energetic tidal constituent, M2 , along the southern open boundary of the parent model (Bay model). The developed model was applied to foresee sea-surface elevation associated with the catastrophic cyclone 1991 and a recent cyclone MORA 2017 along the coast of Bangladesh. We also investigated how the river influences the sea surface elevation with and without fresh water discharge. We also intend to investigate the effect of river discharge with sediment. It is observed that the water levels are found to be influenced by the river system.

scholarly journals Discharge of organic and biogenic substances from small rivers of Kaliningrad region in the Baltic Sea

2007 ◽  
pp. 597-601
Author(s):  
Tatiyana Bernikova ◽  
Anna Malyavkina ◽  
Nadejda Nagornova
Keyword(s):  
Limit Load ◽  
Data Bank ◽  
Small Rivers ◽  
The Baltic Sea ◽  
Hydrochemical Parameters ◽  
Monthly Average ◽  
Kaliningrad Region ◽  
Area Unit ◽  
The Baltic ◽  
Total Average

The Pregolja and the Neman (its basin is situated within four states) rivers are the largestsources of load on the Vistula (Kaliningrad) and the Curonian lagoons from KaliningradRegion, Complex ecological researches of the small rivers were accomplished in 1993-1999,besides the hydrological data bank was replenished due to researches in June 200 I-July 2006,Analysis of monthly average has shown that the load from each studied river (with rareexception only) is directly proportional to size of the basin and to the total average runoffThe condition of these rivers reflects the ecological situation in the significant river waterregime phase area, Hydrochemical parameters reflect a present picture of pollution andsaprobiological parameters characterize a situation in the reservoir for some period of timeinterval before researches, The load from the river is connected with the phases of the riverflow regimes substantially and its different parameters can increase or decrease in accordancewith the changes of underground and superficial nutrition ratio and with the seasonalprevalence of the hydrobionts' vital functions.Thus, one of the criteria for estimating the ecosystem pollution may be the limit; load fromthe river is higher which ceases to be than the exceeding, this means that the load from river isnot proportional to the area of its reservoir, i.e. the river practically looses ability toautopurification.Specific load, i.e. monthly average load from the area unit of the river basin was calculatedand analyzed, The results have estimated the contribution of each river eutrophication of thereceiving water, In particular, load from the Mamonovka and the Prokhladnaya river (theirbasins are partly located in the territory of Poland) concerning the majority of riverparameters was in several times (sometimes in multiple and more) higher than the otherrivers. It was revealed, that the load from the river was substantially connected with anddifferent parameters can increase or decrease pursuant to changes in ratio betweenunderground and surface recharge and seasonality of.

scholarly journals The potential of small mountain river systems for paleoenvironmental reconstructions in drylands - An example from the Binaloud Mountains in northeastern Iran

2021 ◽  
Author(s):  
Azra Khosravichenar ◽  
Morteza Fattahi ◽  
Hamideh Amini ◽  
Hans von Suchodoletz
Keyword(s):  
River System ◽  
Large River ◽  
Alluvial Fan ◽  
Small Rivers ◽  
River Systems ◽  
Mountain Ranges ◽  
Geomorphological Mapping ◽  
Fluvial Dynamics ◽  
Local Tectonics ◽  
Numerical Dating

<p>Fluvial sediments are valuable paleoenvironmental archives of the Quaternary. Since besides environmental factors they are also affected by local tectonics or intrinsic processes, large instead of small catchments should be studied. In drylands covering ca. 45% of the global terrestrial surface large river systems are generally missing, and most river systems are small rivers originating from mountain ranges. Their sediments are potentially interesting paleoenvironmental archives, but are often affected by intensive tectonics. During this study, to obtain a robust regional paleoenvironmental signal a small river system in the southwestern Binaloud Mountains in semi-arid NE Iran was exemplarily studied with a combined approach that encompassed both alluvial fan and catchment. By using geomorphological mapping and numerical dating, fluvial aggradation followed by incision was independently identified in larger areas or in different parts of the river system ca. 95–88 ka, 40 ka, 20 ka, around/after the Pleistocene/Holocene transition and possibly ca. 2.6 ka. These could be linked with regional and over-regional paleoenvironmental data. Furthermore, large boulders on the alluvial fan suggest anthropogenic destabilisation of the catchment during the last decades. Despite strong local tectonics the fluvial dynamics was mostly controlled by paleoenvironmental changes and human activity. This indicates that despite their small size, such river systems form valuable paleoenvironmental archives in drylands where other archive types are largely missing. </p>

scholarly journals Multiyear variations in High Arctic river temperatures in response to climate variability

2018 ◽  
Vol 4 (4) ◽  
pp. 605-623 ◽  
Author(s):  
Christopher Bolduc ◽  
Scott F. Lamoureux
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Aquatic Ecosystems ◽  
Ecosystem Health ◽  
Cold Water ◽  
Thermal Conditions ◽  
River System ◽  
High Arctic ◽  
Small Rivers ◽  
Wide Range

Water temperature measurements (2004–2016) from two small rivers in the High Arctic were analyzed to determine the effects of climate variability on thermal regime and the sensitivity to climate change. The East and West rivers (unofficial names) drain similar watersheds (11.6 and 8.0 km2, respectively) and are located at the Cape Bounty Arctic Watershed Observatory (CBAWO), Melville Island, Canada (74°55′N, 109°35′W). Differences in seasonal timing of river temperatures were evident when comparing the coldest and warmest years of the study period, and across different discharge conditions. Snowmelt runoff is characterized by uniformly cold water (∼0–1 °C) over a wide range of discharge conditions, followed by warming water temperatures during flow recession. The rivers showed varying sensitivity to mid-summer air temperature conditions in a given year, with warmer years indicating high correlation (r2 = 0.794–0.929), whereas colder years showed reduced correlation (r2 = 0.368–0.778). River temperatures reached levels which are reported to negatively affect fish and other cold-water aquatic species (>18 °C) with greater frequency and duration during the warmest years. These results provide a basis to further enhance prediction of river thermal conditions to assess ecosystem health in a river system and to refine insights into the effects of climate change on High Arctic aquatic ecosystems.

An evaluation of hydrometric monitoring across the Canadian pan-Arctic region, 1950–2008

2011 ◽  
Vol 42 (6) ◽  
pp. 479-490 ◽  
Author(s):  
Theo J. Mlynowski ◽  
Marco A. Hernández-Henríquez ◽  
Stephen J. Déry
Keyword(s):  
River System ◽  
Arctic Region ◽  
The Arctic ◽  
Small Rivers ◽  
Labrador Sea ◽  
Hudson Bay ◽  
Water Regulation ◽  
River Systems ◽  
Influence Of Water

This study evaluates the hydrometric monitoring maintained within the Canadian pan-Arctic and is based on the hydrometric gauges closest to northern seas for 76 river systems throughout 1950–2008. Monitoring is quantified by compiling time series of total gauged area and discharge values from the available hydrometric records. We further evaluate the quality of hydrometric data by examining the availability of hydrometric records, the continuity of individual records, and the influence of water regulation on river systems. The maximum gauged area of the Canadian pan-Arctic was 64% in 1990 before it slowly decreased to 56% in 2008. Larger river systems typically had the most hydrometric data available, though each river system had an average of 46% of their records available. In 1998, a maximum of 22 river systems had more than 30 years of continuous records, which is the maximum attained throughout the study period. For future improvements in hydrometric monitoring, additional gauges on relatively small rivers will need to be deployed. We suggest new gauges should be implemented in the Eastern Hudson Bay, Ungava Bay and Labrador Sea basins in spite of the tremendous need for more in the Arctic Archipelago.

scholarly journals The role of wetlands in decreasing small rivers eutrofication in the Kaliningrad region

2019 ◽  
pp. 399-409
Author(s):  
Sergey Umansky ◽  
Marina Kondratenko ◽  
Maria Shibaeva
Keyword(s):  
Middle Part ◽  
Small Rivers ◽  
Contamination Level ◽  
Artificial Wetlands ◽  
Water Ecosystem ◽  
State Of Water ◽  
First Results ◽  
Kaliningrad Region ◽  
The Right

The characteristics of possible ways of solving the problem is described as well as theproof of expediency of realization of measures on decrease of the small riverseutrofication level with the help of self-cleaning abilities ofwetlands is given.As an analog-object for research the river Gurievka (the right inflow of the river Pregel).The water resources of this river are used for hydropower and water-supply fish-breedingfarm.On basis of hydrochemical analysis and usage of bioindication method for saprobityestimation the analysis of state of water ecosystem in carried out for upper, average andundercurrent of the river Gurievka.The waters of the river Gurievka refer to a category "moderately - contaminated".The first results on wetland cleaning capacity research are described. This wetland islocated in the middle part of the river and presented by marshy part of the channel withextention of 120 m.Typha latifolia L. dominates in aquatic plants community's structure.The decrease of water contamination level is noted with passing of water through wetland(COD5 at the input - 4, I Mr02/JI, at the output - 2,2 MrOi/n).By results of study of ecological state of the river it is offered to conduct operations onreconstruction of the coastal zone and creation of artificial wetlands on plots subjected tothe greatest anthropogenic influence.

scholarly journals The Potential of Small Mountain River Systems for Paleoenvironmental Reconstructions in Drylands—An Example from the Binaloud Mountains in Northeastern Iran

Geosciences ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 448
Author(s):  
Azra Khosravichenar ◽  
Morteza Fattahi ◽  
Hamideh Amini ◽  
Hans von Suchodoletz
Keyword(s):  
River System ◽  
Large River ◽  
Alluvial Fan ◽  
Small Rivers ◽  
River Systems ◽  
Mountain Ranges ◽  
Geomorphological Mapping ◽  
Fluvial Dynamics ◽  
Local Tectonics ◽  
Numerical Dating

Fluvial sediments are valuable paleoenvironmental archives of the Quaternary. Since besides environmental factors they are also affected by local tectonics or intrinsic processes, large instead of small catchments should be studied. In drylands covering ca. 45% of the global terrestrial surface large river systems are generally missing, and most river systems are small rivers originating from mountain ranges. Their sediments are potentially interesting paleoenvironmental archives, but are often affected by intensive tectonics. During this study, to obtain a robust regional paleoenvironmental signal a small river system in the southwestern Binaloud Mountains in semi-arid NE Iran was exemplarily studied with a combined approach that encompassed both alluvial fan and catchment. By using geomorphological mapping and numerical dating, fluvial aggradation followed by incision was independently identified in larger areas or in different parts of the river system ca. 95–88 ka, 40 ka, 20 ka, around/after the Pleistocene/Holocene transition and possibly ca. 2.6 ka. These could be linked with regional and over-regional paleoenvironmental data. Furthermore, large boulders on the alluvial fan suggest anthropogenic destabilisation of the catchment during the last decades. Despite strong local tectonics the fluvial dynamics was mostly controlled by paleoenvironmental changes and human activity. This indicates that despite their small size, such river systems form valuable paleoenvironmental archives in drylands where other archive types are largely missing.

scholarly journals Distribution and degradation of terrestrial organic matter in the sediments of peat-draining rivers, Sarawak, Malaysian Borneo

2019 ◽  
Vol 16 (22) ◽  
pp. 4517-4533 ◽  
Author(s):  
Ying Wu ◽  
Kun Zhu ◽  
Jing Zhang ◽  
Moritz Müller ◽  
Shan Jiang ◽  
...  
Keyword(s):  
Organic Matter ◽  
Organic Carbon ◽  
Total Nitrogen ◽  
River System ◽  
Small Rivers ◽  
C3 Plants ◽  
Terrestrial Organic Matter ◽  
Diagenetic Alteration ◽  
Lignin Phenols ◽  
Malaysian Borneo

Abstract. Tropical peatlands are one of the largest pools of terrestrial organic carbon (OCterr); however, our understanding of the dynamics of OCterr in peat-draining rivers remains limited, especially in Southeast Asia. This study used bulk parameters and lignin phenol concentrations to investigate the characteristics of OCterr in a tropical peat-draining river system (the main channel of the Rajang and three smaller rivers: the Maludam, Simunjan, and Sebuyau) in the western part of Sarawak, Malaysian Borneo. The depleted δ13C levels and lignin composition of the organic matter indicates that the most important plant source of the organic matter in these rivers is woody angiosperm C3 plants, especially in the three small rivers sampled. The diagenetic indicator ratio, i.e., the ratio of acid to aldehyde of vanillyl phenols ((Ad∕Al)V), increased with decreasing mean grain size of sediment from the small rivers. The selective sorption of acid relative to aldehyde phenols might explain the variations in the (Ad∕Al)V ratio. Elevated (Ad∕Al)V values observed from the Maludam's sediments may also be attributed to source plant variations. The (Ad∕Al)V ratio appears to be related to the C∕N ratio (the ratio of total organic carbon to total nitrogen) in the Rajang and small rivers. In small rivers, a quick decline of C∕N ratios is a response to the slower modification of (Ad∕Al)V ratios due to better preservation of lignin phenols. An accumulation of lignin phenols with higher total nitrogen percentages (TN%) in the studied systems was observed. Most of the OCterr discharged from the Rajang and small river systems was material derived from woody angiosperm plants with limited diagenetic alteration before deposition and thus could potentially provide significant carbon to the atmosphere after degradation.

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