Essays about: "historic passablility"

Found 1 essay containing the words historic passablility.

  1. 1. Natural migration barriers for fish by hydropower plants : methods to assess historic passability. Case studies of migration barriers

    University essay from SLU/Dept. Of Aquatic Resources

    Author : Johansson Anders; [2016]
    Keywords : natural migration barriers; historic passablility; reference connectivity; connectivity; fish; brown trout; eel; hydropower;

    Abstract : Is it necessary to build fishways at all artificial migration barriers to restore and sustain bio-diversity? Hydropower plants have often been built at places where a difference in height has been used to gain more power, leading to the hypothesis that many hydropower dams have been built at natural migration barriers. How are Swedish running waters (not large rivers) assessed with respect to historical passability for fish at natural migration barriers and dams? How does one study a specific location with respect to the historical passability for different fish species? The methodologies that are evaluated in this thesis are relevant and specific information from a habitat mapping from Värmland County, where 2 903 km waterways already have been surveyed. READ MORE