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The impact of land use and water quality on the flora of ecotones along a small lowland river (Central Poland)

Kopeć D., Dałkowski R., Walisch M., Woziwoda B., Strumiłło M.

Oceanological and Hydrobiological Studies

2014

Vol. 43, No. 2

138--146

The presented study describes the plant species diversity within the terrestrial-water ecotone in relation to the land-use form in a river valley. The study was performed in a lowland river valley where the main forms of riparian zones are partially urbanized, forested and agricultural; the latter being most commonly observed in the investigated region. The present study examines the vascular flora of ecotones where more than 100 plant species were identified. Ecological indices were calculated at all sampling sites based on Zarzycki’s ecological values and biodiversity indices. In addition, the aim of the study was to identify the relationships between the physico-chemical parameters of the water and the floristic indicators in the neighbouring ecotones.

Wpływ budowy geologicznej zlewni Grzmiącej na odpływ podziemny z czwartorzędowych poziomów wodonośnych

Walisch M.

Przegląd Geologiczny

2007

Vol. 55, nr 3

236-236

The author concentrated on characteristic elements of the Grzmiąca basin geology determining its groundwater outflow. The study area is a small part of the Bzura drainage basin located NE of Łódź, in the northern margin of the Łódź Heights, which were formed during theWartanian glaciation. Large thickness [50–110 m] of the fluvioglacially originated Pleistocene sands and gravels is the most important feature of this basin.. They are surrounded from N,W, and S with clays of the Odranian andWartanian glaciations origin. The clays form a ring coinciding with the watershed zone of the basin. This structure is responsible for the high underground water capacity indicated by the analysis of the groundwater outflow changeability. Below the Pleistocene sediments the basin is sealed by Pliocene silts and clays, in practice precluding percolation of groundwaters below the drainage level. It was confirmed by the equalized water balance for 1996–1997 derived from field studies. High permeability of the surface sedimentsn facilitates rainwater infiltration. It also concerns thawing waters, as shown by a comparing the river groundwater supply after and before thawing [March 1996]. Fluctuations of the groundwater outflow are considerable but at the same time they show a very high runoff trend stability. The Grzmiąca catchment fills up with water for a long time and then is slowly drained. The other feature of the studied basin is its high spring yield which together with intensive linear drainage along the rivers results in a very high percentage of groundwater outflow in the total runoff [88.5%]. This is due to the fact that the springs area and along the main river course there is a thick water-bearing horizon consisting of sands of the Odranian and Wartanian age which are continuous, not separated with clays.