scholarly journals Modeling of large wood export at a watershed scale

2021 ◽  
Author(s):  
Daisuke Komori ◽  
Yuto Sukegawa ◽  
Thapthai Chaithong ◽  
So Kazama
Keyword(s):  
Watershed Scale ◽  
Large Wood

Modeling of large wood export at a watershed scale

2021 ◽  
Author(s):  
Daisuke Komori ◽  
Yuto Sukegawa ◽  
Thapthai Chaithong ◽  
So Kazama
Keyword(s):  
Watershed Scale ◽  
Large Wood

LARGE-WOOD LOADING FROM NATURAL AND ENGINEERED PROCESSES AT THE WATERSHED SCALE

2012 ◽  
Vol 29 (8) ◽  
pp. 1030-1041 ◽  
Author(s):  
J. E. Lawrence ◽  
V. H. Resh ◽  
M. R. Cover
Keyword(s):  
Watershed Scale ◽  
Large Wood

Modeling of large wood export at a watershed scale

2021 ◽  
Author(s):  
Daisuke Komori ◽  
Yuto Sukegawa ◽  
Thapthai Chaithong ◽  
So Kazama
Keyword(s):  
Watershed Scale ◽  
Large Wood

scholarly journals Comparison of staircase and asymmetrical before-after control impact (aBACI) experimental designs to test the effectiveness of stream restoration at increasing juvenile steelhead density

2021 ◽  
Author(s):  
Thomas M. Loughin ◽  
Stephen N. Bennett ◽  
Nicolaas Bouwes
Keyword(s):  
Oncorhynchus Mykiss ◽  
Simulation Study ◽  
Habitat Complexity ◽  
Large Scale ◽  
Stream Restoration ◽  
Experimental Designs ◽  
Watershed Scale ◽  
Large Wood ◽  
Intermediate Performance

Before-after-control-impact (BACI) experimental designs are commonly used in large-scale environmental experiments but these designs can be confounded by location and time interactions. Staircase designs, where replicate treatments are staggered temporally, have been suggested as an alternative to BACI designs. We performed a simulation study based on data from an ongoing watershed-scale restoration experiment within three streams to test the effectiveness of adding large wood to increase habitat complexity and abundance and productivity of juvenile steelhead (Oncorhynchus mykiss). We compared the power of two asymmetric BACI (aBACI) designs to two staircase designs for detecting changes in the density of steelhead (fish/m2). A staircase design where treatments were temporally staggered in one treatment section in each stream had the highest power and best precision, especially when the innate spatial and temporal variances of steelhead density were large. A traditional BACI performed the worst, and a variation on another BACI and staircase design had intermediate performance. Multi-stream staircase designs are also more logistically and economically feasible and can maximize learning by replicating experiments across different stream types.

The Methow Beaver Project: the Challenges of an Ecosystem Services Experiment

2019 ◽  
Vol 3 (1) ◽  
pp. 1-14
Author(s):  
Philip Brick ◽  
Kent Woodruff
Keyword(s):  
Ecosystem Services ◽  
Climate Adaptation ◽  
Castor Canadensis ◽  
Water Storage ◽  
Climate Projections ◽  
High Mountain ◽  
Natural Resource Policy ◽  
Watershed Scale ◽  
Positive Role ◽  
Climate Conditions

This case explores the Methow Beaver Project (MBP), an ambitious experiment to restore beaver (Castor canadensis) to a high mountain watershed in Washington State, USA. The Pacific Northwest is already experiencing weather regimes consistent with longer term climate projections, which predict longer and drier summers and stronger and wetter winter storms. Ironically, this combination makes imperative more water storage in one of the most heavily dammed regions in the nation. Although the positive role that beaver can play in watershed enhancement has been well known for decades, no project has previously attempted to re-introduce beaver on a watershed scale with a rigorous monitoring protocol designed to document improved water storage and temperature conditions needed for human uses and aquatic species. While the MBP has demonstrated that beaver can be re-introduced on a watershed scale, it has been much more difficult to scientifically demonstrate positive changes in water retention and stream temperature, given hydrologic complexity, unprecedented fire and floods, and the fact that beaver are highly mobile. This case study can help environmental studies students and natural resource policy professionals think about the broader challenges of diffuse, ecosystem services approaches to climate adaptation. Beaver-produced watershed improvements will remain difficult to quantify and verify, and thus will likely remain less attractive to water planners than conventional storage dams. But as climate conditions put additional pressure on such infrastructure, it is worth considering how beaver might be employed to augment watershed storage capacity, even if this capacity is likely to remain at least in part inscrutable.

A watershed-scale monitoring protocol for bull trout

2009 ◽  
Author(s):  
Dan Isaak ◽  
Bruce Rieman ◽  
Dona Horan
Keyword(s):  
Bull Trout ◽  
Watershed Scale ◽  
Monitoring Protocol
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