[Evaluation of landscape ecological polarization and its application in strategic territorial planning]
2005
Jankauskaite, M.(Vilnius University (Lithuania). Faculty of Natural Sciences)E-mail:[email protected] | Veteikis, D.(Vilnius University (Lithuania). Faculty of Natural Sciences)
The extent of ecological polarization (measure of landscape stability) is conditioned by the combination of (1) landscape geochemical sensitivity and (2) techno-geochemical pressure defined in respective territorial units. With respect to self-cleaning features of landscapes 7 levels of geosystem sensitivity were distinguished and mapped in Lithuania territory. The largest part of the territory is occupied by averagely and more than averagely sensitive geosystems, the least area is taken by relatively intensive and extremely sensitive geosystems. The techno-geochemical pressure was evaluated through the detailed analysis of landscape techno-morphological structure. Using the GIS data bases, in the techno types distinguished the techno-geochemical pressure was evaluated according to the area of industrial and building-up territories, agricultural lands, road net density (adjusted by traffic intensity), and domestic pollution (assessed according to the population density). Each of the agents was given different weight coefficients in regard to its pollution emissions. The layer superposition of the geosystem sensitivity and techno-geochemical pressure gave the emergence of cartoscheme revealing the distribution of areas with different ecological polarization, divided into 5 tension levels. In order to distinguish the priority territories of land management and optimization the polarization area net and the natural frame of Lithuania were superposed.
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