Controlled Reservoir Drawdown—Challenges for Sediment Management and Integrative Monitoring: An Austrian Case Study—Part B: Local Scale
Abstract
:1. Introduction
2. Materials and Methods
2.1. Cross section Variability and Habitat-Related Turbidity Measurements
2.2. Freeze-Core Sampling
2.3. Macroinvertebrates
2.4. Fish—Salmonid Incubation
3. Results
3.1. Cross Section Variability and Habitat-Related Turbidity Measurements
3.2. Freeze-Core Sampling
3.3. Macroinvertebrates
3.4. Fish: Salmonid Incubation
4. Discussion
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Ried | Prutz | Fließ | Imst | Stams | ||
---|---|---|---|---|---|---|
SI | 2015 | 1.42 (high) | 1.74 (good) | 1.32 (high) | 1.8 (good) | 1.9 (good) |
2016 | 1.61 (good) | 1.55 (good) | 1.67 (good) | 1.74 (good) | 1.69 (good) | |
MMI | 2015 | 0.83 (high) | 0.73 (good) | 0.79 (good) | 0.63 (good) | 0.46 (moderate) |
2016 | 0.74 (good) | 0.8 (high) | 0.82 (high) | 0.6 (good) | 0.66 (good) | |
status | 2015 | high | good | good | good | moderate |
2016 | good | good | good | good | good |
Measuring Stations with Fish Breeding Boxes | Living Larvae (lL) | Dead Larvae (dL) | Dead Eggs (dE) | Eyed Eggs (eE) | Dissolved Eggs (Difference on 300) | Total Number of Added Eggs | Hatching Rate [(lL) + (dL)] | Survival Rate [(lL) + (eE)] |
---|---|---|---|---|---|---|---|---|
Station 1 | 134 | 38 | 21 | 9 | 98 | 300 | 57% | 48% |
Station 2 | 254 | 1 | 13 | 13 | 19 | 300 | 85% | 85% |
Station 3 | 0 | 23 | 234 | 0 | 43 | 300 | 8% | 0% |
Station 4 | 238 | 11 | 26 | 0 | 25 | 300 | 83% | 79% |
Station 5 | n/a | n/a | n/a | n/a | n/a | 300 | n/a | n/a |
Station 6 | 218 | 7 | 24 | 0 | 51 | 300 | 75% | 73% |
Station 1 | Station 2 | Station 3 | Station 4 | Station 5 * | Station 6 * | |||||
---|---|---|---|---|---|---|---|---|---|---|
Box 1 | Box 2 | Box 1 | Box 2 | Box 1 | Box 2 | Box 1 | Box 2 | Box 1 | Box 1 | |
[mm] | {%] | {%] | {%] | {%] | {%] | {%] | {%] | {%] | {%] | {%] |
90.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
63.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
56.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 |
31.50 | 12.74 | 16.17 | 20.87 | 21.08 | 21.84 | 18.86 | 16.34 | 15.35 | 18.93 | 11.52 |
22.40 | 28.31 | 27.64 | 29.73 | 31.82 | 25.45 | 23.08 | 41.60 | 36.86 | 27.47 | 27.02 |
16.00 | 29.24 | 28.09 | 25.06 | 26.95 | 27.56 | 28.90 | 23.45 | 32.44 | 26.26 | 31.77 |
11.20 | 12.79 | 7.54 | 8.80 | 7.92 | 7.49 | 9.15 | 8.80 | 7.82 | 8.53 | 8.01 |
8.00 | 3.18 | 1.74 | 1.48 | 1.19 | 0.78 | 1.53 | 1.73 | 0.70 | 1.93 | 1.42 |
4.00 | 3.84 | 2.48 | 2.00 | 0.37 | 0.15 | 0.56 | 0.38 | 0.19 | 3.05 | 2.63 |
2.00 | 8.15 | 13.99 | 7.99 | 6.35 | 5.90 | 4.55 | 2.01 | 1.69 | 10.21 | 14.01 |
1.00 | ||||||||||
0.50 | ||||||||||
0.25 | ||||||||||
0.125 | 1.76 | 2.35 | 4.07 | 4.33 | 10.81 | 13.36 | 5.69 | 4.95 | 3.61 | 3.62 |
0.063 | ||||||||||
pan |
u [i] | u [i] | χ² [i] | χ² [i] | ||
---|---|---|---|---|---|
Fish Breeding Boxes | Living Larvae | Dead Larvae | Living Larvae | Dead Larvae | |
Station 1 | −2.29 | 2.68 | 5.27 | 7.19 | |
Station 2 | 7.13 | −8.33 | 50.80 | 69.39 | |
Station 3 | −13.16 | 15.38 | 173.20 | 236.58 | |
Station 4 | 4.92 | −5.75 | 24.24 | 33.12 | |
Station 5 | n/a | n/a | n/a | n/a | |
Station 6 | 3.40 | −3.98 | 11.59 | 15.83 | |
Total | 265.10 | 362.10 | χ² | ||
4 | 4 | df | |||
0.05 | 0.05 | p |
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Hauer, C.; Holzapfel, P.; Flödl, P.; Wagner, B.; Graf, W.; Leitner, P.; Haimann, M.; Holzer, G.; Haun, S.; Habersack, H.; et al. Controlled Reservoir Drawdown—Challenges for Sediment Management and Integrative Monitoring: An Austrian Case Study—Part B: Local Scale. Water 2020, 12, 1055. https://doi.org/10.3390/w12041055
Hauer C, Holzapfel P, Flödl P, Wagner B, Graf W, Leitner P, Haimann M, Holzer G, Haun S, Habersack H, et al. Controlled Reservoir Drawdown—Challenges for Sediment Management and Integrative Monitoring: An Austrian Case Study—Part B: Local Scale. Water. 2020; 12(4):1055. https://doi.org/10.3390/w12041055
Chicago/Turabian StyleHauer, Christoph, Patrick Holzapfel, Peter Flödl, Beatrice Wagner, Wolfram Graf, Patrick Leitner, Marlene Haimann, Georg Holzer, Stefan Haun, Helmut Habersack, and et al. 2020. "Controlled Reservoir Drawdown—Challenges for Sediment Management and Integrative Monitoring: An Austrian Case Study—Part B: Local Scale" Water 12, no. 4: 1055. https://doi.org/10.3390/w12041055
APA StyleHauer, C., Holzapfel, P., Flödl, P., Wagner, B., Graf, W., Leitner, P., Haimann, M., Holzer, G., Haun, S., Habersack, H., & Schletterer, M. (2020). Controlled Reservoir Drawdown—Challenges for Sediment Management and Integrative Monitoring: An Austrian Case Study—Part B: Local Scale. Water, 12(4), 1055. https://doi.org/10.3390/w12041055