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Răzvan Voicu and Lawrence G. Dominguez
Răzvan Voicu and Pete Baki
, La Crosse, Wisconsin, June 2005, 25. Kay E. L. and Voicu R., 2013 ‒ Developing An Ecological And Migration System For Ichthyofauna On The Crişul Repede River Near The City Hall Of Oradea, Management of Sustainable Development, Sibiu, Romania, 5, 2, 27- 33. Keefer M., Caudill C, Clabough T., Jepson M., Johnson E., Peery C., Higgs M., Moser M. (2013). Fishway passage bottleneck identification and prioritization: a case study of Pacific lamprey at Bonneville Dam Canadian Journal of Fisheries and Aquatic Sciences, Vol. 70, No. 10: pp
(7): 1045–1063. Dyszy M. 2017. Migracje wewnętrzne ludności w wybranych gminach wiejskich województwa śląskiego w latach 2002–2015. Acta Geographica Silesiana , 11/2 (26): 17–19. Everaers P.C.J., Musterd S. 1994. Changing Residential Patterns in Metropolitan Subareas in the Netherlands during the Eighties. Journal of Housing and the Built Environment , 9(1): 5–22. Fielding A.J. 1989. Migration and urbanization in Western Europe since 1950. The Geographical Journal , 155(1): 60–69. Gałka J., Warych-Juras A. 2018. Suburbanization and migration in
This article presents results of an analysis of impact of a designed discharge of contaminated water into the Dead Vistula (Wisła Martwa) in the region of the Isthmus (Przesmyk) with the aim of determination of a possible effect of the pollution onto protected areas of Natura 2000 (bird habitats and sites, especially the Bird Paradise – Ptasi Raj) nature reserve. The analysis was conducted on the basis of the two-dimensional modelling of unsteady transport of non-degradable dissolved matter. To this end, a numerical model of a section of the Dead Vistula was worked out. Four scenarios of hydro-dynamical conditions (2 – for average weather conditions and 2 – for stormy weather conditions) were selected. To solving the equation of pollution migration the finite volumes method (MOS) was applied. Two localizations of contaminated water discharge outlet were considered, namely: the first from the side of Siennicki Bridge before the Isthmus and the other in the section of the Brave Vistula (Wisła Śmiała) downstream the Isthmus. The obtained results made it possible to assess positively the first localization of the designed discharge outlet. In the other case there is a fear that at unfavourable hydro-meteorological conditions a water pollution may happen over Natura 2000 protected areas.
The 90s of the twientieth century carried a restructuring of the industry which involved the adaptation of enterprises to operate in a market economy, the workforce reduction and privatization of industrial facilities. Economic transformation has contributed to the socio-economic changes in industrial and mining towns. It affected the changes in the employment structure, changes in the number of population, migration decisions, the quality of medical care and municipal institutions support. Ruda Śląska is a typical mining town, history of which for nearly 200 years has been a consecutive period associated with the mining and heavy industries. This work is based on statistical data and approximates the effects of restructuring evident in Ruda Śląska. The presented characterization indicates that the situation prevailing in the city refers to the conditions of life in the most traditional mining regions of Central and Eastern Europe. Despite the significant reconstruction in the employment structure, Ruda Śląska retains partly its mining character. Population of the town is trying to cope with the need to adapt to new economic realities, among others, by changing the sector of economy to work in. Employment reductions have contributed to the increase of population migration. In conjunction with the natural loss it resulted in a decrease of the number of population and population aging. The support of the cities and sanitary facilities offered, among others, by social assistance centers and employment has great importance in overcoming the negative effects of the economic transformation.
Chunguan Zhang, Jingguo Chen, Mingyi Song, Jinkuan Wang and Bingqiang Yuan
References 4. Bauer C., and Fichler C., Quaternary lithology and shallow gas from high resolution gravity and seismic data in the central North sea, Petroleum Geoscience, Vol. 8, pp. 229-236, 2002. 5. Cao Z., Calculation of extension and subsidence of the Cenozoic pull-apart and rift basins along the Yingkou- Weifang fault zone, Chinese Journal of Geology, Vol. 43, pp. 65-81, 2008. 6. Carolyn Lampe, Guoqi Song, Liangzi Cong, and Xing Mu, Fault control on hydrocarbon migration and accumulation in the Tertiary
Zbigniew Otremba and Eugeniusz Andrulewicz
Wodnej - Oddział Morski w Gdyni, (1987-2012) 15. Karlsson, L.: Migration of European silver eels, Anguilla anguilla. Orientation to the earth's magnetic feld and pulpmill efuents particularly in the Baltic, Acta Universitatis Upsaliensis 745, pp.5-24, (1984) 16. Medwin H. & Clay C. S.: Fundamentals of Acoustical Oceanography, Academic, Boston, 1998MTBiGW (Ministry of Transport Construction and Maritime Economy): Map of potential places selected for location of wind farms in the exclusive economic zone, (in Polish) 17. Moller, P.: Electric Fishes: History and
Mirjanka Madjevikj, Biljana Apostolovska Toshevska, Svemir Gorin and Marija Ljakoska
region. Proc. Int. Sci. Symp. "Hilly mountain areas-problems and perspectives", 1, Ohrid, Macedonian Geogr. Soc.: 313-324. Bornarova S., Janeska V. 2012. Social impact of emigration and rural-urban migration in central and eastern Europe: final report - European commission, DG employment, social affairs and inclusion- GVG. Daskalovski V. 1998. The process of demographic ageing of the population in the Republic of Macedonia. Geo. Reviews, 32-33, Macedonian Geogr. Soc., Skopje: 93-98. Friganović M. 1972-1973. Types of
Mammad İ. Mammadov
Results of the study showed that cultivation of the grey-brown (chestnut) and mountain brown soils under the grape plantation changes their morphogenetic and morphological characteristics in arid subtropical climatic condition. Performed cultivation caused migration of humus into the deeper soil layers. The denser horizon formed under a soft layer. This results in a change of the soil chemical structure and water-physical properties. These changes manifested themselves under irrigative condition.
Technical solutions for water damming structures in forest streams
Small dams are basic elements of water retention systems in agricultural landscape and in forest ecosystems. Despite small water raising and location across small streams, these constructions should conform to security regulations and be resistant to destructive effect of flowing water. Moreover, they shouldn't be a strange element to the natural landscape of the river valley or forest ecosystem. Attention is also focussed in this paper on providing unobstructed flow in natural and artificial streams and on the possibility of migration for aquatic organisms. Examples of dams that do not hamper fish migration are given.