Estimation of bedload transport in headwater streams using a numerical model (Moravskoslezké Beskydy Mts, Czech Republic)

Abstract

Traditionally, the spatial organization of elementary education was based on the concept of school districts. Uneven regional development and population changes contributed to the destabilization of some regional education systems and led to the modification of catchment area boundaries. In the West, the neo-liberal policies of the 1980s led to the decentralization of school systems, allowed schools to focus on specific subjects, and gave parents the possibility to choose schools based on criteria other than school catchment area. The aim of this paper is to discuss the importance of factors influencing elementary school choice in an urban environment, using the Czech city of Liberec as an example. We will attempt to answer the following research questions: Do pupils from a given catchment area are enrolled at the elementary school closest to their place of residence? What factors influence school choice? How do school choice-related motives differ based on the socioeconomic characteristics of specific areas in an urban space? This study combines GIS spatial modeling methods with questionnaire surveys conducted in selected schools. The results demonstrate that in choosing schools parents base their decisions on many factors. School location is still one of the most important, even though Czech pupils are no longer required to attend their district school. In our study, attendance of the closest elementary school is influenced by the school's macro-location within the city, that is, mainly by the location of each school in relation to the center and outlying areas of the city.

Downstream fining trends of gravel bar sediments: a case study of Czech Carpathian rivers

“…The streams with higher sediment supply showed less developed bedforms with lower flow resistance. (Galia and Hradecký 2014;Yager et al 2007;Chiari and Rickenmann 2011).…”

Channel processes of a large alluvial river under human impacts

“…It has been in the focus of research by both hydraulic engineers and fluvial geomorphologists due to its role in river morphology and critical fluvial ecosystems, sediment input into coastal systems, water quality changes, impact on infrastructure such as bridges, effect on navigation and reservoirs (Coleman, 1969;Gomez and Church, 1989;Lawler, 1993;Rosgen, 1994;Lopes et al, 2004;Church and Hassan, 2005;Wakelin-King and Webb, 2007;Bertoldi et al, 2009;Keesstra et al, 2009;Dade et al, 2011;Ouyang et al, 2013;Jaeger et al, 2017;Pfeiffer et al, 2017;Moody, 2019). According to Church (2006), the morphology of an alluvial river channel is the consequence of sediment transport and sedimentation in the river; thus, the quality and quantity of sediments delivered by the river induces the morphological changes ( Petit et al, 1996;Church, 2006;Galia and Hradecký, 2014;López et al, 2014;Choi and Lee, 2015;Knox and Latrubesse, 2016;Yu et al, 2016).…”

“…The measurement of the development of point-bars include the use of aerial photographs (Srisunthon and Choowong, 2019), digital terrain models (Kasvi et al, 2013), satellite images and laser surveys (Hagstrom et al, 2018;Kasvi et al, 2013;Srisunthon and Choowong, 2019) and differential Global Position Systems (Cosma et al, 2019). The complex interplay of flows, quality and quantity of sediments, as well the geometry of rivers are significant in the deposition and erosion of a point-bar, just as in many other fluvial processes (Galia and Hradecký, 2014;Hagstrom et al, 2018;Moody, 2019). The relative location of the point-bar either in the upstream or downstream section also affects its development (Ghinassi et al, 2016).…”