Water management by artificial water level increasing in rivers, results in environment changes. As the decreasing of the barrages influence at environment, fishpasses, that make the fish migration possible, are designed. In this article factors that have an effect on fishpasses development are described with the STEEPVL method. Their influence and prediction are described. During investigations the SWOT method was used also. It was used to determine positive factors groups (strengths, opportunities) and negative factors groups (weaknesses, threats) that have an influence on fishpasses development. On the basis of keyfactors of the STEEPVL method four scenarios were elaborated that describe the future of he studied problem.

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