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oai:figshare.com:article/34034305 2026-09-30T17:23:36Z category_15 category_272 category_39 category_45 category_734 category_69 portal_5 item_type_1 month_year_09_2026

<p>Simulated average velocity along the main flow vector () (continues orange and green lines) and average (dotted orange and green line) from 3D and 2D HN simulations in the observation section 3, measured average velocities by ADV (blue triangles) and LDV (green squares).</p> Falko Wagner (25144984) Ianina Kopecki (25144987) Jelger Elings (16794784) Ulf Enders (25144990) Andreas Lindig (25144993) Kathrin Maltzahn (25144996) Tom Roessger (25144999) Márcio S. Roth (25145002) Mansour Royan (25145005) Jürgen Stamm (18938626) Stefan Hoerner (20229803) Neuroscience Environmental Sciences not elsewhere classified Ecology Sociology Biological Sciences not elsewhere classified Inorganic Chemistry salmo trutta </ hidden markov models direct behavioral observations behavioral rules identified strong flow acceleration sprint swimming speed spatial velocity gradient analyze activity states activity peak occurred sedated fish passing fish protection solutions div >< p high flow velocity swimming behavior even hydraulic conditions characterized fish behavior appears flow velocities exceeding fish movement behavior flow velocity swimming activity high velocities hydraulic conditions movement modes fish behavior daylight conditions underlying mechanisms substantial role results illustrate remain understudied quantitative approach pump intakes primary trigger predictive accuracy injury rates hydropower facilities hardly possible experimental flume enhanced understanding draw conclusions daylight increased considerable proportion avoidance reactions analyzed based <p>Colored bars specify the four hydraulic zones (after [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0348737#pone.0348737.ref045" target="_blank">45</a>]), Approach zone:- < 0.2 ; <; zone: > 0.2 ; <; Mixed zone: > 0.2 ; ≥ ; High velocity zone: < 0.2 ; ≥ ; *gradual transition between the SVG and mixed zone due to the length dependent variation of the theoretical sprint swimming speed of each fish. The x-axis denotes the streamwise position along the experimental flume measured from the start of section 1 of the flume; the observation area analyzed here corresponds to 12.5 < x < 22, thus section 3, the observation area (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0348737#pone.0348737.g001" target="_blank">Fig 1</a>).</p> 2026-09-30T17:23:32Z Image Figure 10.1371/journal.pone.0348737.g002 https://figshare.com/articles/figure/_p_Simulated_average_velocity_along_the_main_flow_vector_continues_orange_and_green_lines_and_average_dotted_orange_and_green_line_from_3D_and_2D_HN_simulations_in_the_observation_section_3_measured_average_velocities_by_ADV_blue_triangles_/34034305 CC BY 4.0