scholarly journals Analysis of ice phenomena hazard on the middle Odra river

2017 ◽  
Vol 49 (4) ◽  
pp. 301-314 ◽  
Author(s):  
Krzysztof Wolski ◽  
Tomasz Tymiński ◽  
Beata Głuchowska
Keyword(s):  
Water Management ◽  
Cross Sections ◽  
Reference Data ◽  
Life Sciences ◽  
Ice Cover ◽  
Frazil Ice ◽  
Ice Jam ◽  
Odra River ◽  
Regional Water ◽  
Ice Phenomena

Abstract The paper contains analysis of ice phenomena occurrence in the light of recent observations conducted on middle Odra river from Krapkowice (ca. km 125+000) to Krosno Odrzańskie (ca. km 530+000). In detail the research embraced time of occurrence and intensity of individual ice phenomena in years 2006–2017 together with reference and comparison of data to previous data from period 1957–2005. In characteristic cross-sections there is a reference to occurrence of all observed forms of ice phenomena (frazil ice, border ice, ice cover, floe and ice-jam). In the study a reference data of Regional Water Management Authority in Wrocław were used together with results of previous research conducted at the Wrocław University of Environmental and Life Sciences. The results legitimized, that the occurrence of ice phenomena on middle Odra river has time of its appearance, duration and intensity and is not stable in every year. Occurrence of ice phenomena on middle Odra river varies in time, being observed as manifold forms of icing – most frequently border ice and frazil ice. During the last 12 years greater than the average number of days with ice phenomena occurrence can be observed, but these phenomena have definitely “milder” character (border ice).

scholarly journals ICE PHENOMENA IN THE WARTA RIVER IN POZNAŃ IN 1961– 2010

2014 ◽  
Vol 33 (1) ◽  
pp. 51-59 ◽  
Author(s):  
Marika Kornaś
Keyword(s):  
Ice Cover ◽  
Frazil Ice ◽  
Maximum Thickness ◽  
Ice Jam ◽  
Maximum Duration ◽  
Gauge Station ◽  
Freeze Date ◽  
Ice Floes ◽  
Ice Phenomena

Abstract The article presents variability of ice phenomena in the Warta River in Poznań based on data recorded in the water gauge station in Poznań - Roch Bridge in 1961-2010. The work aims to characterize and analyze ice phenomena and related hazards. First dates (freeze date), last dates (thaw date) and duration of ice phenomena and particular forms of ice, i.e. frazil ice, border ice, ice cover, ice floes and ice jam, were determined. In case of ice cover, its thickness was also analyzed. In the analyzed period, ice phenomena in the Warta River in Poznań had the maximum duration of 118 days, the earliest date appearance was on November 7 and the last on March 28. The first ice form to appear was frazil ice, the last ice floes and the longest lasting - ice floes. In the entire analyzed period, 15 winter seasons featured ice cover. The longest duration of ice cover was 29 days and its maximum thickness was 8 cm.

scholarly journals Long-Term Variability in the Course of Ice Phenomena on the Vistula River in Toruń

2009 ◽  
Vol 1 (1) ◽  
pp. 91-102 ◽  
Author(s):  
Bogusław Pawłowski
Keyword(s):  
Water Management ◽  
Middle Ages ◽  
Ice Cover ◽  
Data Series ◽  
Vistula River ◽  
Winter Temperatures ◽  
Ice Regime ◽  
River Control ◽  
Ice Phenomena

Abstract Our first information of ice cover on the Vistula River in Poland dates from the Middle Ages. However, only since the 19th century have continuous observations been available. This study makes use of a data series, obtained mainly from IMGW (Institute of Meteorology and Water Management), covering the years 1861-2003 for ice phenomena and 1814-2003 for ice cover. Considerable shortening has been observed in the duration of both ice phenomena (from 60-120 days to 30-80 days) and ice cover (from 40-100 days to 20-60 days). These trends correspond well with the trend in winter temperatures becoming warmer. However, the transformation of the ice regime on the Vistula River in Toruń has also been affected by the river control, the construction and operation of the Włocławek Dam and (to a lesser degree than at Korzeniewo) icebreaking activities.

scholarly journals The statistical relation/coherence between ice-regimes of Lake Raduńskie Górne and Lake Ostrzyckie

2018 ◽  
Vol 18 (3) ◽  
pp. 103-108
Author(s):  
Jacek Barańczuk
Keyword(s):  
Water Management ◽  
Statistical Models ◽  
Ice Cover ◽  
Empirical Models ◽  
The Other ◽  
Statistical Relation ◽  
Ice Regime ◽  
The University ◽  
Ice Phenomena ◽  
Cover Pattern

AbstractThis article is an attempt to analyse and compare several selected parameters regarding ice phenomena using the correlation analysis of two lakes, which are benchmark lakes located in the central part of the Kashubian Lakeland. These lakes are: Raduńskie Górne, a larger one (387.2 hm2) and Ostrzyckie, a smaller one covering an area of 308.0 hm2. The analysis covered measurement sequences for the period 1971–2010. The material for analysis regarding data on ice phenomena on Lake Raduńskie Górne was obtained from the University of Gdańsk Limnological Station in Borucino while the data for Lake Ostrzyckie was obtained from the Institute of Meteorology and Water Management (IMGW). Relations between the following parameters of the ice regime were analysed: duration of the ice phenomena, duration of the ice cover, average and maximum thickness of the ice cover. The analysis and data comparisons have revealed that there are strong and very strong relations between the analysed parameters, which made it possible to develop proper statistical models. Hence, should there be a lack of data on the ice-cover pattern for one of these lakes it is possible to recreate them using the elaborated empirical models and data for the other.

scholarly journals Ice phenomena on Lake Wielki Staw in the Valley of Five Polish Lakes

2017 ◽  
Vol 17 (2) ◽  
pp. 71-77 ◽  
Author(s):  
Adam Choiński
Keyword(s):  
Water Management ◽  
Ice Cover ◽  
Close Vicinity ◽  
The Mean ◽  
Ice Phenomena

AbstractThe paper presents an analysis of the ice phenomena on Lake Wielki Staw in the Valley of Five Polish Lakes based on observations of the Institute of Meteorology and Water Management conducted in the years 1971–1979. The dates of commencement and decline of ice phenomena and ice cover and their persistence were determined. For 1978 and 1979, changes in the ice cover were determined, i.e. from development to decline. Due to the close vicinity of Lake Morskie Oko, comparisons were performed in terms of variability of ice phenomena of both of the lakes. The study showed among others that although Lake Wielki Staw is located higher than Lake Morskie Oko by approximately 270 m, ice phenomena on the lake appear on the average 10 days later than in Lake Morskie Oko, and the mean persistence of the ice cover is the same, i.e. it amounts to 167 days.

Seasonal variations in the properties and structural composition of sea ice and snow cover in the Bellingshausen and Amundsen Seas, Antarctica

1997 ◽  
Vol 43 (143) ◽  
pp. 138-151 ◽  
Author(s):  
M. O. Jeffries ◽  
K. Morris ◽  
W.F. Weeks ◽  
A. P. Worby
Keyword(s):  
Sea Ice ◽  
Isotopic Composition ◽  
Snow Cover ◽  
Sea Water ◽  
Ice Cores ◽  
Ice Cover ◽  
Snow Accumulation ◽  
Ice Formation ◽  
Frazil Ice ◽  
Core Sets

AbstractSixty-three ice cores were collected in the Bellingshausen and Amundsen Seas in August and September 1993 during a cruise of the R.V. Nathaniel B. Palmer. The structure and stable-isotopic composition (18O/16O) of the cores were investigated in order to understand the growth conditions and to identify the key growth processes, particularly the contribution of snow to sea-ice formation. The structure and isotopic composition of a set of 12 cores that was collected for the same purpose in the Bellingshausen Sea in March 1992 are reassessed. Frazil ice and congelation ice contribute 44% and 26%, respectively, to the composition of both the winter and summer ice-core sets, evidence that the relatively calm conditions that favour congelation-ice formation are neither as common nor as prolonged as the more turbulent conditions that favour frazil-ice growth and pancake-ice formation. Both frazil- and congelation-ice layers have an av erage thickness of 0.12 m in winter, evidence that congelation ice and pancake ice thicken primarily by dynamic processes. The thermodynamic development of the ice cover relies heavily on the formation of snow ice at the surface of floes after sea water has flooded the snow cover. Snow-ice layers have a mean thickness of 0.20 and 0.28 m in the winter and summer cores, respectively, and the contribution of snow ice to the winter (24%) and summer (16%) core sets exceeds most quantities that have been reported previously in other Antarctic pack-ice zones. The thickness and quantity of snow ice may be due to a combination of high snow-accumulation rates and snow loads, environmental conditions that favour a warm ice cover in which brine convection between the bottom and top of the ice introduces sea water to the snow/ice interface, and bottom melting losses being compensated by snow-ice formation. Layers of superimposed ice at the top of each of the summer cores make up 4.6% of the ice that was examined and they increase by a factor of 3 the quantity of snow entrained in the ice. The accumulation of superimposed ice is evidence that melting in the snow cover on Antarctic sea-ice floes ran reach an advanced stage and contribute a significant amount of snow to the total ice mass.

scholarly journals Strengths and Weaknesses of the Dutch Implementation of the Water Framework Directive

2017 ◽  
Vol 14 (3-4) ◽  
pp. 269-293 ◽  
Author(s):  
Lorenzo Squintani ◽  
Ernst Plambeck ◽  
Marleen van Rijswick
Keyword(s):  
Water Management ◽  
The Netherlands ◽  
Water Governance ◽  
Functional Approach ◽  
Governance System ◽  
Member States ◽  
Potential Source ◽  
History Of ◽  
Dutch Experience ◽  
Regional Water

The Netherlands has a long and fascinating history of water management. The main features of the Dutch water governance system for the implementation of the wfd are its regional water authorities based on hydrological scales and powers to regulate, decide and raise taxes for their water tasks. Their functional approach and the decentralised character make the regional water authorities very efficient and effective. It is therefore understandable that eu institutions and other Member States consider the Dutch system an interesting potential source of inspiration for other jurisdictions. Yet, it is not all gold what shines. This paper highlights the strength and weakness elements of the Dutch water governance system under the wfd. It exposes several points of concern. When considering using the Dutch experience as a source of inspiration in other Member States, these concerns should be taken in due account.

Regional Water Balance and Economic Assessment as Tools for Water Management in Coastal Lebanon

2008 ◽  
Vol 23 (11) ◽  
pp. 2361-2378 ◽  
Author(s):  
Daniel El Chami ◽  
Maroun El Moujabber ◽  
Alessandra Scardigno
Keyword(s):  
Water Management ◽  
Water Balance ◽  
Economic Assessment ◽  
Regional Water

scholarly journals Statewide Water Planning: The Georgia Experience

2011 ◽  
Vol 43 (3) ◽  
pp. 357-366 ◽  
Author(s):  
Jeffrey D. Mullen
Keyword(s):  
Water Management ◽  
Water Use ◽  
Planning Process ◽  
Management Plan ◽  
The State ◽  
Water Planning ◽  
The Past ◽  
Extensive Effort ◽  
Recommended Practices ◽  
Regional Water

Several states in the southeast have acknowledged the need for statewide water planning but have yet to act. In contrast, Georgia is on the cusp of completing the Georgia Comprehensive Statewide Water Management Plan (SWMP). The SWMP provides for resource assessments, forecasts, and regional water planning. Over the past three years, an extensive effort has been made to implement the SWMP. This article describes the planning process undertaken in Georgia. Several of the recommended practices are also highlighted and critiqued with respect to their potential to affect aggregate water use in the state.

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