scholarly journals Test of a Physical Habitat Model for Stream Restoration : A Case Study on Midstream of Anyang-Cheon

2015 ◽  
Vol 31 (1) ◽  
pp. 35-41 ◽  
Author(s):  
Kyong Oh Baek ◽  
Chang Hwan Kim
Keyword(s):  
Stream Restoration ◽  
Habitat Model ◽  
Physical Habitat

scholarly journals Predicting Macroinvertebrate Responses to Water Abstraction in Alpine Streams

Water ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2121
Author(s):  
Gabriele Consoli ◽  
Fabio Lepori ◽  
Christopher T. Robinson ◽  
Andreas Bruder
Keyword(s):  
Habitat Model ◽  
Feeding Guilds ◽  
Physical Habitat ◽  
Macroinvertebrate Communities ◽  
Indirect Measure ◽  
Water Abstraction ◽  
Habitat Template ◽  
Hydropower Potential ◽  
Hydraulic Conditions ◽  
Alpine Streams

Exploitation of hydropower potential in alpine areas undermines the ecological integrity of rivers. Damming and water abstraction substantially alter the physical habitat template of rivers, with strong repercussions on aquatic communities and their resources. Tools are needed to predict and manage the consequences of these alterations on the structure and functioning of macroinvertebrate communities and resource availability in alpine streams. We developed habitat preference models for taxa, functional feeding guilds, and organic resources to quantify the effects of discharge alteration on macroinvertebrate communities in two alpine streams. Our physical habitat model related an indirect measure of bottom hydraulic forces (FST hemispheres) to the distribution of macroinvertebrate taxa and their resources. We observed that flow-dependent habitat availability for macroinvertebrate communities generally decreased with increasing water abstraction. We were able to relate these changes to near-bed hydraulic conditions. Our results suggest, however, the existence of upper discharge thresholds delimiting optimal habitat conditions for taxa. In contrast, we found weak effects of near-bed hydraulic conditions on resource distribution. Overall, our findings contribute towards predicting the impacts of water abstraction on macroinvertebrate communities in small alpine streams and the benefits of baseflow restoration.

Fish Habitat: Essential Fish Habitat and Rehabilitation

1999 ◽  
Keyword(s):  
Lake Erie ◽  
Habitat Management ◽  
Fish Habitat ◽  
Learning By Doing ◽  
Suitable Habitat ◽  
Physical Habitat ◽  
Fish Stocks ◽  
Habitat Features ◽  
Fish Habitats

<em>Abstract.—</em> The quality and quantity of habitats determine ecosystem productivity. Hence, they determine the potential fish productivity that sustains the fish harvests extractable from freshwaters and seas. Efforts to conserve and protect fish habitats are frustrated by key unanswered questions: which habitat types and how much must be protected to ensure natural self-sustaining fish stocks? Minns and Bakelaar presented a prototype method for assessing suitable habitat supply for fish stocks in Lake Erie, an analysis that can be used to address conservation issues. Here, the method is refined and extended, taking the assessment of habitat supply for pike <em>Esox lucius </em> in the Long Point region of Lake Erie as a case study. As with the previous study, much emphasis is placed on “learning by doing.” Because available inventories of habitat features are coarse and incomplete, improved guidelines for estimating habitat supply are expected from these prototype studies. The habitat supply method previously presented by Minns and Bakelaar is elaborated in three ways here: (1) the basic physical habitat assessment is derived from a remote-sensing inventory database; (2) methods of quantifying the thermal regime and integrating it with other habitat elements are examined; (3) habitat supply estimates are used in a pike population model, and pike biomass and production are simulated for the Long Point region of Lake Erie and then compared with available records. The roles of error and uncertainty are examined for all elements in the estimation and application of suitable habitat supply values. There is potential for supply measurement and analysis to guide fish habitat management.

Optimisation of a fuzzy physical habitat model for spawning European grayling (Thymallus thymallus L.) in the Aare river (Thun, Switzerland)

2008 ◽  
Vol 215 (1-3) ◽  
pp. 122-132 ◽  
Author(s):  
Ans M. Mouton ◽  
Matthias Schneider ◽  
Armin Peter ◽  
Georg Holzer ◽  
Rudolf Müller ◽  
...  
Keyword(s):  
Habitat Model ◽  
Physical Habitat ◽  
Thymallus Thymallus ◽  
European Grayling

scholarly journals Evaluation of By-Pass Fishway Operation for Attraction Efficiency Based on GPS Drifter Field Experiments

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2302
Author(s):  
Kyong Oh Baek ◽  
Jeong Min Lee ◽  
Tae Geom Ku ◽  
Young Do Kim
Keyword(s):  
Fish Species ◽  
Flow Rate ◽  
Field Experiments ◽  
Main Channel ◽  
Spawning Season ◽  
Habitat Model ◽  
Rate Variation ◽  
Physical Habitat ◽  
Optimal Flow ◽  
Target Fish

The attraction efficiency of a by-pass fishway installed at Gangjeong-Goryeong Weir on the Nakdong River in South Korea was evaluated according to flow rate variation of the main channel. Optimal flow rate that achieved the maximum value of attraction efficiency at the fishway entrance was also determined. The weir can adjust the flow rate of the main channel and the fishway by operating sluice gates. The weighted usable area (WUA) calculated on the basis of habitat suitability criteria (HSC) for target species using River2D (a two-dimensional physical habitat model) was regarded as an indicator of attraction efficiency. The simulated velocity field by River2D was validated by virtue of measured data acquired from GPS drifter field experiments. Additionally, monthly fish monitoring data obtained with a fish trap served as supporting data to confirm the validity of the estimated attraction efficiency. The monitoring results revealed that the fishway attraction efficiency was the highest during the spawning season (from April to June). The target fish used the fishway most frequently in April. However, many other fish species used the fishway in June. Simulation results revealed that the flow rate of the main channel at the weir should be maintained at 190 m3/s in order to most effectively attract the target fish species into the fishway entrance. Managing the optimal flow rate by operating the sluice gate is especially important during the spawning season of the target fish to facilitate upstream and downstream migration.

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