Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study)
The investigated fish pass is a part of construction of а very low-head hydrostatic pressure machine (HPM) located on existing weir in the upper Iskar River. Monitoring of the hydraulic features of the fish pass during the different hydraulic conditions was performed. Diversity and abundance of the...
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Polish Society of Ecological Engineering (PTIE)
2019-06-01
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doaj-f7d384130652455b9ee3418f04190dda2020-11-24T20:48:53ZengPolish Society of Ecological Engineering (PTIE)Journal of Ecological Engineering2299-89932019-06-01206667210.12911/22998993/108918108918Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study)Silviya Petkova0Emil Kanev1Ina Dimitrova2Dimitar Kisliakov3Eliza Uzunova4Department of Hydraulic, Irrigation and Drainage Engineering, University of Architecture, Civil Engineering and Geodesy, 1 Hr. Smirnenski Blvd., 1046 Sofia, BulgariaDepartment of General and Applied Hydrobiology, Faculty of Biology, Sofia University, 8 Dr. Tsankov Blvd., 1046 Sofia, BulgariaDepartment of Hydraulic, Irrigation and Drainage Engineering, University of Architecture, Civil Engineering and Geodesy, 1 Hr. Smirnenski Blvd., 1046 Sofia, BulgariaDepartment of Hydraulic, Irrigation and Drainage Engineering, University of Architecture, Civil Engineering and Geodesy, 1 Hr. Smirnenski Blvd., 1046 Sofia, BulgariaDepartment of General and Applied Hydrobiology, Faculty of Biology, Sofia University, 8 Dr. Tsankov Blvd., 1046 Sofia, BulgariaThe investigated fish pass is a part of construction of а very low-head hydrostatic pressure machine (HPM) located on existing weir in the upper Iskar River. Monitoring of the hydraulic features of the fish pass during the different hydraulic conditions was performed. Diversity and abundance of the local fish fauna was carried out with the aim to verified target fish species. A major limiting factor for using of the fish pass during flood periods was high water velocity (both inside the fish pass and at the fish pass downstream entrance), while during the low water discharge periods it was the insufficient water depth in some pools and the significant differences between water levels in the adjacent pools. The difference between the water levels at the entrance and exit of the fish pass reduces the chances for access of small-sized fish species. For improving fish pass functionality, some measures were developed. Several re-construction solutions were proposed in attempt to help solving the identified problems.http://www.journalssystem.com/jeeng/Fish-pass-functionality-in-relation-to-the-dynamics-of-hydrological-conditions-in,108918,0,2.htmlfish passBulgariahydraulic conditionsIskar River |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Silviya Petkova Emil Kanev Ina Dimitrova Dimitar Kisliakov Eliza Uzunova |
spellingShingle |
Silviya Petkova Emil Kanev Ina Dimitrova Dimitar Kisliakov Eliza Uzunova Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study) Journal of Ecological Engineering fish pass Bulgaria hydraulic conditions Iskar River |
author_facet |
Silviya Petkova Emil Kanev Ina Dimitrova Dimitar Kisliakov Eliza Uzunova |
author_sort |
Silviya Petkova |
title |
Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study) |
title_short |
Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study) |
title_full |
Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study) |
title_fullStr |
Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study) |
title_full_unstemmed |
Fish Pass Functionality in Relation to the Dynamics of Hydrological Conditions in the Upper Course of the River Iskar (Case Study) |
title_sort |
fish pass functionality in relation to the dynamics of hydrological conditions in the upper course of the river iskar (case study) |
publisher |
Polish Society of Ecological Engineering (PTIE) |
series |
Journal of Ecological Engineering |
issn |
2299-8993 |
publishDate |
2019-06-01 |
description |
The investigated fish pass is a part of construction of а very low-head hydrostatic pressure machine (HPM) located on existing weir in the upper Iskar River. Monitoring of the hydraulic features of the fish pass during the different hydraulic conditions was performed. Diversity and abundance of the local fish fauna was carried out with the aim to verified target fish species.
A major limiting factor for using of the fish pass during flood periods was high water velocity (both inside the fish pass and at the fish pass downstream entrance), while during the low water discharge periods it was the insufficient water depth in some pools and the significant differences between water levels in the adjacent pools. The difference between the water levels at the entrance and exit of the fish pass reduces the chances for access of small-sized fish species. For improving fish pass functionality, some measures were developed. Several re-construction solutions were proposed in attempt to help solving the identified problems. |
topic |
fish pass Bulgaria hydraulic conditions Iskar River |
url |
http://www.journalssystem.com/jeeng/Fish-pass-functionality-in-relation-to-the-dynamics-of-hydrological-conditions-in,108918,0,2.html |
work_keys_str_mv |
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