Essays about: "river entrance"

Showing result 1 - 5 of 6 essays containing the words river entrance.

  1. 1. Den vuxna laxens migration i Vindelälvens laxtrappa

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Camilla Blomdahl; Jeanette Jonsson; [2020]
    Keywords : laxtrappa; Salmo salar; uppströmsmigration; Vindelälven; laxmigration;

    Abstract : Lax, Salmo salar, har en anadrom livscykel. Den spenderar delar av sitt liv ute i saltvatten i havet innan den simmar tillbaka till sitt söta hemvatten för lek. För en del laxar blockeras de naturliga vandringsvägarna till lekplatsen av vattenkraftverk. Konstgjorda laxtrappor byggs ibland för att underlätta vandringen. READ MORE

  3. 2. Bubbles guide migrating smolts around hydropower plants

    University essay from Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Author : Shona MacArthur; [2019]
    Keywords : Atlantic salmon; migration; bubble barrier; hydropower plant; predation;

    Abstract : The development of hydroelectric power production and the damming of water courses that ensues causes a threat to the migration patterns of Atlantic salmon (Salmo salar), by altering their habitat and compromising river connectivity. Because the species’ survival heavily depends on the completion of their migration between rivers and oceans, the design of guidance structures that promote successful passages around dams is a critical goal. READ MORE

  4. 3. Designing of frazil ice test rig

    University essay from Högskolan i Skövde/Institutionen för ingenjörsvetenskap

    Author : Niloufar Safa; [2015]
    Keywords : ;

    Abstract : A large part of electricity in Sweden is produced by hydropower plants, which are a safe and pollution-free source for electricity production. In the cold season, when the temperature of water decreases to below zero, water can be frozen and different types of ice will be generated. Frazil Ice is one type of ice that is made by turbulent water. READ MORE

  5. 4. Passage efficiency and migration behavior for adult Atlantic salmon at a Half-Ice Harbor fish ladder

    University essay from SLU/Dept. of Wildlife, Fish and Environmental Studies

    Author : Robert Karlsson; [2013]
    Keywords : passage efficiency; salmon; fish ladder; telemetry; power station;

    Abstract : Due to exploitation of the world’s rivers, the upstream migration of anadromous species is frequently delayed or even prevented. To mitigate these problems and allow fish to migrate past obstacles, structures such as fish ladders have been developed. However, recent studies show that many of the present fish passage facilities are deficient. READ MORE

  6. 5. Wave Setup in River Entrances - Field Surveys of Wonboyn Lake Estuary and Tallebudgera Creek Estuary, Australia

    University essay from Lunds universitet/Avdelningen för Teknisk vattenresurslära

    Author : Henrik Ölander Hjalmarsson; [2011]
    Keywords : wave setup; river entrance; estuary; lagoon; australia; HEC-RAS; wonboyn; tallebudgera; Technology and Engineering;

    Abstract : It is unclear whether wave setup exists in river entrances and previous studies have shown that it is virtually non-existent in trained river entrances. However, conclusive studies have not been made on semi-trained and untrained river entrances. READ MORE