KALIVODOVÁ, Martina, Ondřej HÁJEK, Blažena BRABCOVÁ, Klára KOMPRDOVÁ and Karel BRABEC. Habitat-scale evaluation of stream restoration effects: case study at Knehyne Stream. In REFORM International Conference on River and Stream Restoration “Novel Approaches to Assess and Rehabilitate Modified Rivers. 2015.
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Basic information
Original name Habitat-scale evaluation of stream restoration effects: case study at Knehyne Stream
Name (in English) Habitat-scale evaluation of stream restoration effects: case study at Knehyne Stream
Authors KALIVODOVÁ, Martina, Ondřej HÁJEK, Blažena BRABCOVÁ, Klára KOMPRDOVÁ and Karel BRABEC.
Edition REFORM International Conference on River and Stream Restoration “Novel Approaches to Assess and Rehabilitate Modified Rivers, 2015.
Other information
Type of outcome Conference abstract
Confidentiality degree is not subject to a state or trade secret
WWW URL
Organization unit Faculty of Science
Keywords (in Czech) revitalizace toku, Kněhyně, makrozoobentos, fytobentos, hydromorfologie koryta
Keywords in English stream restoration, Knehyne stream, macroinvertebrates, phytobenthos, channel hydromorphology
Tags International impact
Changed by Changed by: Mgr. Blažena Brabcová, Ph.D., učo 17794. Changed: 9/3/2016 14:47.
Abstract
Regulated channel of small mountain stream (Knehyne) was restored within 300 m long section. Straightened stream channel with fixed banks was changed to paired-channel pattern which has been evaluated as natural for this stream stretch. Short length of restored stretch and sedimentary unbalanced catchment required fixation of newly constructed channels by trunks anchored into river bed. Restoration aimed to change detrimental effects of vertical erosion in regulated channel into more natural channel forming processes. Furthermore coniferous forest in floodplain of restored stretch was replaced by more natural riparian vegetation. Restored river stretch differs from regulated one by occurrence of specific hydromorphological structures (side pools, lateral channels, habitat heterogeneity in bank zone). We observed specific conditions in terms of water chemistry and thermal regime in lateral habitats (pools and temporary channels). Macroinvertebrates, phytobenthos and particulate organic matter characteristics were analyzed for response to hydromorphological changes at microhabitat scale. Case study results were given into context of restoration effects in small streams obtained from 10 pairs of degraded-restored stretches (including Knehyne stream). Ecological consequences of altered hydromorphology were also compared between small and medium-sized streams studied at microhabitat scale.
Abstract (in English)
Regulated channel of small mountain stream (Knehyne) was restored within 300 m long section. Straightened stream channel with fixed banks was changed to paired-channel pattern which has been evaluated as natural for this stream stretch. Short length of restored stretch and sedimentary unbalanced catchment required fixation of newly constructed channels by trunks anchored into river bed. Restoration aimed to change detrimental effects of vertical erosion in regulated channel into more natural channel forming processes. Furthermore coniferous forest in floodplain of restored stretch was replaced by more natural riparian vegetation. Restored river stretch differs from regulated one by occurrence of specific hydromorphological structures (side pools, lateral channels, habitat heterogeneity in bank zone). We observed specific conditions in terms of water chemistry and thermal regime in lateral habitats (pools and temporary channels). Macroinvertebrates, phytobenthos and particulate organic matter characteristics were analyzed for response to hydromorphological changes at microhabitat scale. Case study results were given into context of restoration effects in small streams obtained from 10 pairs of degraded-restored stretches (including Knehyne stream). Ecological consequences of altered hydromorphology were also compared between small and medium-sized streams studied at microhabitat scale.
Links
LM2011028, research and development projectName: RECETOX ? Národní infrastruktura pro výzkum toxických látek v prostředí
Investor: Ministry of Education, Youth and Sports of the CR
LO1214, research and development projectName: Centrum pro výzkum toxických látek v prostředí (Acronym: RECETOX)
Investor: Ministry of Education, Youth and Sports of the CR
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