Nadzwyczajne zdarzenia w infrastrukturze transportu drogowego województwa łódzkiego
Exceptional events in the infrastructure of road transport in Łódź district

Summary/Abstract: The aim of this analysis is to present events, which concerned communication infrastructurein Łódź district in 1999-2004 in river valleys. Valleys' borders were taken from geomorphologicdrafts of Detailed Geological Maps in scale of 1 : 50 000. The total number of events was 430,which was 14.2% of total registered events in particular district. Within long lasting period thenumber of events successively grew, the fastest increase was observed in the group of smallevents (~ l kg of the used sorbent), however medium events were just after small ones (~ 10 kg of the used sorbent). Large local events (> 100 kg of the used sorbent) did not exceed10% of the total of small events, with no definite tendency to change.As a result of increase of events number, the amount of used sorbent increased as well.Between 1999 and 2004 its fourfold increase was recorded. During the whole year its warmhalf year was significantly dominant. The greatest danger for the environment of Łódź districtriver valleys, according to EWID _99 database, is generated by road transport partially causingchemical and ecological threat. However, the scale of this phenomenon is very changeable. Ifthe amount of used sorbent is compared, it is clear that its 6% were used in chemical andecological rescue operations in 2000, while 43% in 2003. Between two biggest river valleyscrossing Łódź district more endangered one is Warta river valley. During the period ofanalysis 35 local events took place (8% of total events in river valleys) and 967 of sorbentswere used, of which 1% were used to remove ecological elTects. In Pilica valley the number ofevents was two times smaller, what resulted in usage sixfold smaller amount of sorbents thanin Warta valley. Any chemical and ecological events were recorded.

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