Morfologiczne i geologiczne tło procesu obiegu wody w małej zlewni położonej w północnej części Wyżyny Łódzkiej
Morfological and geological conditions in the drainage basin located in the northern part Łódź Upland

Summary/Abstract: This article refers to "The Convention on the Protection of the Biological Variety" ratified by Poland in 1995. Its content directly concerns the geographical variety as the background of the water circulation process. The authors discuss the geological structure and the surface features as well as the changes of these elements of the enviroment as the many factors deciding about the surficial retention, infiltration and [Jltration rates, intensity and quantity of the immediate, or the underground runoIT. The object of interest is the Dzierźązna drainage basin - the exploration area of the Łódź University Department of Hydrology and Water Management which is in the western part of the northern Łódź Upland margin. This area is known for the thickest Pleistocene covernear Łódź. It is also the zone of numerous glacitectonic accumulations very diITerentlitho logically, and the zone of Tertiaryand Quaternary covers.The character of the relief and the lithologic conditions in the basin (fig. 3 & 4) cause structure differentiations of the water circulation elements, the development of the river network, the thickness of the active change zone, etc.The Dzierżązna drainage basin because of its big spatial variability of the environmental conditions, has always been variously used and managed by people. The signs of this management, among others water dammings near mills and fulling-mills, clay workings, sandpits or gravel pits are still very distinct elements of the landscape and have their influence on the present water circulation in this area.

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