Lower Scotts Creek Floodplain and Habitat Enhancement Project

Cook, Benjmain O

doi:10.15368/theses.2016.109

Cited by 3 publications

(4 citation statements)

References 23 publications

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“…Nevertheless, stationary antenna array detections indicated that ghost tag movement occurred at flows as low as ~6 m 3 •s -1 , which is approximately 20% of the estimated bankfull discharge in mainstem Scott Creek (Cook 2016). Thus, even though drought conditions prevailed throughout the two years of our study, we found evidence that multiple flow events were capable of mobilizing and transporting PIT tags.…”

Section: Ghost Tag Movementmentioning

confidence: 56%

Occurrence, fate, and confounding influence of ghost passive integrated transponder tags in an intensively monitored watershed

Bond

Nicol

Kiernan

et al. 2019

Can. J. Fish. Aquat. Sci.

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Over the last three decades, passive integrated transponder (PIT) tags have been widely used to study fish populations. Interpretation of PIT tag detections, however, can be confounded by the presence of ghost tags, tags liberated when a fish dies. We used a combination of mobile antenna surveys, stationary antenna detections, and multistate mark–recapture modeling to assess the abundance and fate of ghost tags in a coastal California watershed. Accumulation of ghost tags from released hatchery-origin coho salmon (Oncorhynchus kisutch) smolts was substantial during California’s recent drought, with 2224 ghost tags identified during mobile reader surveys. Between surveys, PIT tags moved downstream a median distance of 346 m and a maximum distance of 1982 m. Stationary antenna array detections indicated that these movements occurred during high-flow events, concurrent with live fish movement. The multistate model estimated that, during winter, approximately 40% of tags were buried in the substrate beyond the read range of mobile readers. Failure to account for transport and burial dynamics of ghost tags can lead to biased estimates of fish abundance, survival, and movement.

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Section: Ghost Tag Movementmentioning

confidence: 56%

Occurrence, fate, and confounding influence of ghost passive integrated transponder tags in an intensively monitored watershed

Bond

Nicol

Kiernan

et al. 2019

Can. J. Fish. Aquat. Sci.

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“…This study used the Lower Scotts Creek Stream Floodplain and Habitat Enhancement Project (LSCR) as a case study. The LSCR used LWCs (large wood complex), floodplain connections, and riparian planting to conduct SHI (Cook, 2016). This methodology coupled LCA and topographic effectiveness monitoring to quantify the environmental performance of the LSCR, a study conducted in two phases.…”

Section: General Approach -Modelingmentioning

confidence: 99%

“…For example, construction contracting groups are often hired to build structures and operate similar types of equipment in both processes (Cook, 2016). The river restoration process is like materials production systems because both systems may use similar types of earthmovers (Stripple, 2001; Barandica et al, 2013;Cook, 2016). This section also highlights a study on erosion control materials because conducting erosion control is commonly practiced in river restoration.…”

Section: Lca Applications In Construction and Materials Productionmentioning

confidence: 99%

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Quantifying the Environmental Performance of a Stream Habitat Improvement Project

Morse¹

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River restoration projects are being installed worldwide to rehabilitate degraded river habitat. Many of these projects focus on stream habitat improvement (SHI), and an estimated 60%of the 37,000 projects listed in the National River Restoration Science Synthesis Program focus on SHI for salmon and trout species. These projects frequently lack a sufficient monitoring program or account for the environmental costs associated with SHI. The present study used life cycle assessment (LCA) techniques and topographic effectiveness monitoring to quantify environmental costs on the basis of geomorphic change. This methodology was a novel approach to assessing the cost-benefit relationship of SHI. To test this methodology, two phases of the Lower Scotts Creek Floodplain and Habitat Enhancement Project (LSCR) were used as a case study. The LSCR was a SHI project installed along the northern coast of Santa Cruz County, California, USA. A limited scope LCA was used to quantify the life cycle impacts of raw material production, materials transportation, and on-site construction. Once these baseline results were produced, a topographic monitoring program was used to quantify the topographic diversity index (TDI) in pre-and post-project conditions. The TDI percent change was used to scale the baseline LCA results, which quantified the environmental impacts based on geomorphic change. Phase II outperformed phase I. Phase I had greater cumulative environmental impacts and experienced a 7.7 % TDI increase from pre-to post-project conditions. Phase II had 43% less cumulative environmental impacts and experienced a 7.9% TDI increase from pre-to post-project conditions. The impacts in phase I were greater because of the amount of material excavated to create off-channel features, which were a key feature of the LSCR. A scenario analysis also was conducted within the LCA component of this study. The scenario analysis suggests that life cycle impacts could be reduced by 30%-65% by using the accelerated recruitment method in place of importing materials to build large wood complexes. The results of this study suggest that managers may improve the environmental performance of SHI projects by: (1) using the accelerated recruitment method to introduce larger key pieces to the channel, reducing the need to import materials; (2) using nursery grown plants as opposed to excavating plants for revegetation; (3) minimizing fuel combustion in heavy equipment and haul trucks by ensuring clear access to the channel and streambank, using small engine equipment to clear access corridors during site preparation, running more fuel-efficient machinery or bio-fuel powered machinery, and by attempting to minimize haul distances by sourcing materials locally; and (4) utilizing a "franken-log" design (a ballasted LWC configuration with a rootwad fastened to the downstream end of a log) in LWCs which led to favorable TDI change. This study concluded that LCA could be a valuable tool for monitoring SHI and river restoration projects and that further research ...

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Quantifying carbon footprint for ecological river restoration

Chiu

Yang

Morse

2021

Environ Dev Sustain

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RIVER restoration is a popular technique to rehabilitate degraded river habitat. Given the nature of these types of engineering projects, using ecological indicators to monitor the restoration effectiveness has been a traditional approach. However, as this approach emphasizes the post-project performance, environmental impact attributed to a project’s construction phase has received little attention directly or indirectly. This study quantified the carbon footprint of ecological river restoration, using a project in California as a case study. A topographic diversity index (TDI) was developed as a functional unit of the river restoration project, indicating how a restoration project can increase the variation of habitat topography. The results show that river restoration can lead to greenhouse gas emissions ranging from 288 to 336 kg CO2 equivalent (kg CO2e) for every 1% of TDI improvement, or 9–14 kg CO2e per meter stream restored. This study identified that improving raw material acquisition plans and heavy-duty equipment rental decision can be feasible strategies leading to the reduction of carbon footprint.

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Lower Scotts Creek Floodplain and Habitat Enhancement Project

Cited by 3 publications

References 23 publications

Occurrence, fate, and confounding influence of ghost passive integrated transponder tags in an intensively monitored watershed

Occurrence, fate, and confounding influence of ghost passive integrated transponder tags in an intensively monitored watershed

Quantifying the Environmental Performance of a Stream Habitat Improvement Project

Quantifying carbon footprint for ecological river restoration

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