Verification of Hydraulic Parameters of Nature-like Fish Pass
Nature-like fish passes are commonly designed as a preferred way to overcome barriers in rivers. However, meeting the recommended hydraulic parameters for these passes can be challenging. As a result, boulders or sills are often incorporated to supplement their structure. From a hydraulic standpoint...
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| Format: | Article |
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MDPI AG
2023-07-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/15/13/2478 |
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| author | Lea Čubanová Ján Rumann Alexandra Vidová Wael Almikaeel Filip Rebenda |
| author_facet | Lea Čubanová Ján Rumann Alexandra Vidová Wael Almikaeel Filip Rebenda |
| author_sort | Lea Čubanová |
| collection | DOAJ |
| description | Nature-like fish passes are commonly designed as a preferred way to overcome barriers in rivers. However, meeting the recommended hydraulic parameters for these passes can be challenging. As a result, boulders or sills are often incorporated to supplement their structure. From a hydraulic standpoint, the crucial parameters under investigation are the depths and velocities (or the corresponding velocity field). In this study, a comprehensive analysis was conducted on a full-width rock-ramp fish pass constructed in a river, specifically targeting the barbel zone. The achieved parameters were assessed through direct field measurements, complemented by mathematical modeling using 1D and 2D HEC-RAS models (version 6.3.1). For the assessment of model accuracy, the error indices root mean square error (RMSE) and mean absolute error (MAE) were used. Based on their evaluation, the 1D model provides more precise results in the assessed profiles (the RMSE for depths (m) was 0.0663 (for velocities (m∙s<sup>−1</sup>) 0.293) compared to the 2D model, where the RMSE for depths (m) was 0.070 (for velocities (m∙s<sup>−1</sup>) 0.398), the MAE for the 1D model for depths (m) was 0.0350 (for velocities (m∙s<sup>−1</sup>) 0.185) compared to the 2D model, where the MAE for depths (m) was 0.0375 (for velocities (m∙s<sup>−1</sup>) 0.274)). The findings highlight the differences in the problem-solving approaches between the models as well as the potential for simplifications in practical applications. |
| first_indexed | 2024-03-11T01:25:22Z |
| format | Article |
| id | doaj.art-53388518bc954e40a55db8d4a1e342d7 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-11T01:25:22Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-53388518bc954e40a55db8d4a1e342d72023-11-18T17:48:54ZengMDPI AGWater2073-44412023-07-011513247810.3390/w15132478Verification of Hydraulic Parameters of Nature-like Fish PassLea Čubanová0Ján Rumann1Alexandra Vidová2Wael Almikaeel3Filip Rebenda4Department of Hydraulic Engineering, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinského 11, 810 05 Bratislava, SlovakiaDepartment of Hydraulic Engineering, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinského 11, 810 05 Bratislava, SlovakiaDepartment of Hydraulic Engineering, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinského 11, 810 05 Bratislava, SlovakiaDepartment of Hydraulic Engineering, Faculty of Civil Engineering, Slovak University of Technology in Bratislava, Radlinského 11, 810 05 Bratislava, SlovakiaWater Research Institute, Nábr. arm.gen.L. Svobodu 5, 812 49 Bratislava, SlovakiaNature-like fish passes are commonly designed as a preferred way to overcome barriers in rivers. However, meeting the recommended hydraulic parameters for these passes can be challenging. As a result, boulders or sills are often incorporated to supplement their structure. From a hydraulic standpoint, the crucial parameters under investigation are the depths and velocities (or the corresponding velocity field). In this study, a comprehensive analysis was conducted on a full-width rock-ramp fish pass constructed in a river, specifically targeting the barbel zone. The achieved parameters were assessed through direct field measurements, complemented by mathematical modeling using 1D and 2D HEC-RAS models (version 6.3.1). For the assessment of model accuracy, the error indices root mean square error (RMSE) and mean absolute error (MAE) were used. Based on their evaluation, the 1D model provides more precise results in the assessed profiles (the RMSE for depths (m) was 0.0663 (for velocities (m∙s<sup>−1</sup>) 0.293) compared to the 2D model, where the RMSE for depths (m) was 0.070 (for velocities (m∙s<sup>−1</sup>) 0.398), the MAE for the 1D model for depths (m) was 0.0350 (for velocities (m∙s<sup>−1</sup>) 0.185) compared to the 2D model, where the MAE for depths (m) was 0.0375 (for velocities (m∙s<sup>−1</sup>) 0.274)). The findings highlight the differences in the problem-solving approaches between the models as well as the potential for simplifications in practical applications.https://www.mdpi.com/2073-4441/15/13/2478nature-like fish passroughness coefficient1D mathematical model2D mathematical modeldepthvelocity |
| spellingShingle | Lea Čubanová Ján Rumann Alexandra Vidová Wael Almikaeel Filip Rebenda Verification of Hydraulic Parameters of Nature-like Fish Pass Water nature-like fish pass roughness coefficient 1D mathematical model 2D mathematical model depth velocity |
| title | Verification of Hydraulic Parameters of Nature-like Fish Pass |
| title_full | Verification of Hydraulic Parameters of Nature-like Fish Pass |
| title_fullStr | Verification of Hydraulic Parameters of Nature-like Fish Pass |
| title_full_unstemmed | Verification of Hydraulic Parameters of Nature-like Fish Pass |
| title_short | Verification of Hydraulic Parameters of Nature-like Fish Pass |
| title_sort | verification of hydraulic parameters of nature like fish pass |
| topic | nature-like fish pass roughness coefficient 1D mathematical model 2D mathematical model depth velocity |
| url | https://www.mdpi.com/2073-4441/15/13/2478 |
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