Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Impacts of Barriers on Topeka Shiner Populations
This report presents a research study that investigated the effect of culverts on movement of Topeka shiner and other warm water fish species. The study was conducted in the James, Big Sioux and Vermillion Watersheds in Eastern South Dakota from 2007 to 2010. A combination of fish passage experiments, hydrologic and hydraulic data collection, hydraulic modeling and genetic investigations were used for the study. The study results show that culverts did impede fish movement for warm water fish species, including Topeka shiner. However, fish did pass through culverts in all studies designed to directly measure fish passage. Topeka shiners were documented passing through a range of conditions including water depths from 0.15 ft to 1.51 ft, average water velocities ranging between 0.03 ft/s and 2.6 ft/s, outlet drops up to 0.1 ft, culvert slopes between 0.55% and 2.12%, and lengths from 53 ft to 70.3 ft, with culvert materials consisting of concrete box, corrugated metal pipe (CMP) and structural steel plate (SSP) materials. Hydraulic data and modeling results indicate that the CMP and SSP created the most difficult passage conditions (due to high water velocities and large outlet drops), with the exception of one concrete structure that had an outlet drop of 2.7 ft at low water. It should be emphasized that CMP and SSP structures, if properly designed, constructed and maintained, can provide effective fish passage. They created difficult passage conditions in this study because of site specific conditions and channel degradation near them. Hydraulic data and modeling results indicate that the large culverts, such as the concrete box culverts in this study, that spanned the entire stream channel and were set deep in the stream created conditions that minimized fish passage impedance and thus provided the easiest movement for fish. The genetic study showed that there was moderate genetic differentiation between populations with a tendency for populations to be genetically similar to other populations in their drainage. At specific culvert sites, two cases showed statistically significant genetic differences above and below culverts and two did not. The authors recommend that new culvert installations in critical Topeka shiner habitat streams should be designed to span the entire stream channel and be set deep enough to maintain a natural substrate throughout the structure.
Impacts of Barriers on Topeka Shiner Populations
This report presents a research study that investigated the effect of culverts on movement of Topeka shiner and other warm water fish species. The study was conducted in the James, Big Sioux and Vermillion Watersheds in Eastern South Dakota from 2007 to 2010. A combination of fish passage experiments, hydrologic and hydraulic data collection, hydraulic modeling and genetic investigations were used for the study. The study results show that culverts did impede fish movement for warm water fish species, including Topeka shiner. However, fish did pass through culverts in all studies designed to directly measure fish passage. Topeka shiners were documented passing through a range of conditions including water depths from 0.15 ft to 1.51 ft, average water velocities ranging between 0.03 ft/s and 2.6 ft/s, outlet drops up to 0.1 ft, culvert slopes between 0.55% and 2.12%, and lengths from 53 ft to 70.3 ft, with culvert materials consisting of concrete box, corrugated metal pipe (CMP) and structural steel plate (SSP) materials. Hydraulic data and modeling results indicate that the CMP and SSP created the most difficult passage conditions (due to high water velocities and large outlet drops), with the exception of one concrete structure that had an outlet drop of 2.7 ft at low water. It should be emphasized that CMP and SSP structures, if properly designed, constructed and maintained, can provide effective fish passage. They created difficult passage conditions in this study because of site specific conditions and channel degradation near them. Hydraulic data and modeling results indicate that the large culverts, such as the concrete box culverts in this study, that spanned the entire stream channel and were set deep in the stream created conditions that minimized fish passage impedance and thus provided the easiest movement for fish. The genetic study showed that there was moderate genetic differentiation between populations with a tendency for populations to be genetically similar to other populations in their drainage. At specific culvert sites, two cases showed statistically significant genetic differences above and below culverts and two did not. The authors recommend that new culvert installations in critical Topeka shiner habitat streams should be designed to span the entire stream channel and be set deep enough to maintain a natural substrate throughout the structure.
Impacts of Barriers on Topeka Shiner Populations
M. Blank (Autor:in) / B. Bramblett (Autor:in) / S. Kalinowski (Autor:in) / J. Cahoon (Autor:in) / K. Nixon (Autor:in)
2011
96 pages
Report
Keine Angabe
Englisch
Fisheries & Aquaculture , Hydrology & Limnology , Natural Resource Management , Road Transportation , Highway Engineering , Culverts , Barrier impacts , Fish passages , Water quality , Endangered species , Fish populations , Hydraulics , Freshwater fish , Aquatic biology , Hydrology , Topeka shiner , Notropis topeka
| British Library Conference Proceedings | 2005
| British Library Conference Proceedings | 2005
| Engineering Index Backfile | 1901
| Engineering Index Backfile | 1938