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This thesis deals with the problems associated with the revitalization of watercourses. For a processing of study watercourse revitalization was selected basin of Dobechov stream. The proposal of the measures should contribute to the improvement of the water regime and ecological stability in the area. The work contains theoretical and practical part. In theory, the reader finds the concepts associated with the adjustment of watercourses and revitalization measures, where they are individually described. In the practical part is characterized the area of interest with the proposal for the revitalization of the watercourse. Finally, it evaluated the current status of stream and benefits of the proposed measures. Part of the work is also a list of literature which was used, photographs of the area of interest and map outputs.

The thesis deals with issues of tanks, mainly in terms of their functions, reconstruction and construction. There is also developed problem of eutrophication of water and sediments. All these mentioned points affects functionality and usefulness of tanks. Further bachelor thesis contains a description and evaluation of tanks in Dobechovský stream catchment area. The obtained data were compared with survey conducted in 1999 on this area of interest.

The presented thesis deals with the structure and composition of macrozoobenthos of Pohořský and Dobechovský brooks in the Novohradské Mountains. The evaluation was based on the collections from 10 localities carried out in July 2001, March 2002 and July 2002/2003. In addition to determination and classification of the species found, the collections have also been qualitatively evaluated with the use of the diversity index (saprobic index, Belgian Biotic index) and the similarity index. It has been found that the zoobenthos population of Pohořský and Dobechovský brooks encompasses the species of both trout and grayling zones. In most taxa it concerns characteristic representatives of clear, flowing and adequately aerated water. Mutual species similarity of macrozoobenthos population of Pohořský and Dobechovský brooks is approximately 40%. The comparison of macrozoobenthos population diversity indices of Pohořský and Dobechovský brooks has shown that the Pohořský brook bentic fauna is, according to the obtained data, richer and better balanced. From the saprobity point of view, the Pohořský brook can mainly be placed into oligosaprobic stream class. The water of Dobechovský brook oscillates between oligosaprobic and {$\beta$}-mesosaprobic level.