Summary:

The paper presents an natural indexation of the Olawa river precincts city Strzelin, with particular consideration of land management closely adjoin the river. The analysis was based on field research carried out by Ilnickiego and Le-wandowski methods. The research covered approximately 3.5 km long section of the river, which was divided into 15 homogeneous sections. The period of presented research was covered between July and September 2010 and May 2011. Based on respective section of the inventory, an assessment of species diversity and assessment of the degree of naturalness as well as natural river system values. The results indicate a low ecomorphological value of the Olawa river adjoin Strzelin. The River has been classified to the IV category of natural, what means that the analyzed area is fully regulated, and the ecosystem is clearly changed, and the landscape attractiveness is very small. The significant presence of species affinity with nitrogen in the adjoin watercourse areas, which may be related to the agricultural nature of the land adjacent to the river in the municipality of Strzelin.