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You searched for: Author "Pasternack, G.B." Remove constraint Author: "Pasternack, G.B."
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1. Large wood aids spawning Chinook salmon (Oncorhynchus tshawytscha) in marginal habitat on a regulated river in California

Author:
Pasternack, G.B.,   et al.   ; Senter, A.E.;     Show all 2 Author
Source:
River research and applications 2011 v.27 no.5 pp. 550-565
ISSN:
1535-1459
Subject:
Mediterranean climate; Oncorhynchus tshawytscha; habitats; islands; managers; nests; rivers; spawning; wood; California
Abstract:
... To determine whether large wood (LW, ≥1-m length, ≥10-cm diameter) plays a role in Chinook salmon (Oncorhynchus tshawytscha) redd (i.e. egg nest) placements in a regulated, Mediterranean-climate, medium-sized river (where channel width is less than the upper quartile of length of potential instream wood pieces), characteristics of 527 large wood pieces, locations of 650 redds, and mesohabitat deli ...
DOI:
10.1002/rra.1388

2. Differences in river ecological functions due to rapid channel alteration processes in two California rivers using the functional flows model, part 2--model applications

Author:
Pasternack, G.B.,   et al.   ; Escobar-Arias, M.I.;     Show all 2 Author
Source:
River research and applications 2011 v.27 no.1 pp. 1-22
ISSN:
1535-1459
Subject:
Oncorhynchus tshawytscha; ecological function; freshwater; habitats; models; rivers; sediment transport; shear stress; spawning; stream channels; California
Abstract:
... This study applies the functional flows model (FFM) that integrates hydrogeomorphic processes and ecological functions to assess physical habitat. Functional flows are discharge values that serve ecological uses. The model was adjusted to evaluate gravel-bed riffle functionality for fall-run Chinook salmon with respect to river rehabilitation on the Mokelumne River and flood-induced channel change ...
DOI:
10.1002/rra.1335

3. Substrate requirements of spawning Chinook salmon (Oncorhynchus tshawytscha) are dependent on local channel hydraulics

Author:
Pasternack, G.B.,   et al.   ; Moir, H.J.;     Show all 2 Author
Source:
River research and applications 2010 v.26 no.4 pp. 456-468
ISSN:
1535-1459
Subject:
Oncorhynchus tshawytscha; fish; fluid mechanics; microhabitats; rivers; sorting; spawning
Abstract:
... Micro-scale (<0.1 channel widths) physical conditions within channels ultimately exert a strong control on habitat selection by fish species. Data are presented demonstrating that micro-habitat requirements of spawning Chinook salmon (Oncorhynchus tshawytscha) are strongly inter-related; fish utilized coarser substrate if associated with faster flow velocities. This was not observed to be controll ...
DOI:
10.1002/rra.1292

4. Natural and anthropogenic geochemical signatures of floodplain and deltaic sedimentary strata, Sacramento-San Joaquin Delta, California, USA

Author:
Pasternack, G.B.,   et al.   ; Brown, K.J.;     Show all 2 Author
Source:
Environmental pollution 2006 v.141 no.2 pp. 295-309
ISSN:
0269-7491
Subject:
agricultural land; wetlands; floodplains; sediment contamination; trace elements; metals; pollutants; geochemistry; sediment deposition; bioavailability; anthropogenic activities; leaching; California
DOI:
10.1016/j.envpol.2005.08.044
PubMed:
16236412

5. Use of slope creation for rehabilitating incised, regulated, gravel bed rivers

Author:
Pasternack, G.B.,   et al.   ; Elkins, E.M.; Merz, J.E.;     Show all 3 Authors
Source:
Water resources research 2007 v.43 no.5 pp. W05432 (16 p
ISSN:
0043-1397
Subject:
rivers; gravel; breeding sites; water management; spawning; Oncorhynchus tshawytscha; wildlife habitats; ecological restoration; hydrogeology
Abstract:
... Gravel-bedded channels often become incised and degraded below dams. Gravel can be added to the channel to rehabilitate hydrogeomorphic conditions, including those promoting salmon spawning. When implemented without increasing bed slope, gravel addition at downstream riffles back floods upstream riffles. A 2-year gravel augmentation project was done to test the efficacy of a new method for “slope ...
DOI:
10.1029/2006WR005159

6. Estimating suspended sediment concentration using turbidity in an irrigation-dominated southeastern California watershed

Author:
Pasternack, G.B.,   et al.   ; Gao, P.; Bali, K.M.; Wallender, W.W.;     Show all 4 Authors
Source:
Journal of irrigation and drainage engineering 2008 v.134 no.2 pp. 250-259
ISSN:
0733-9437
Subject:
irrigation and drainage; agricultural watersheds; irrigation water; runoff; water analysis; sediments; particle size distribution; turbidity; spatial variation; temporal variation; California
DOI:
10.1061/(ASCE)0733-9437(2008)134:2(250)

7. Error propagation for velocity and shear stress prediction using 2D models for environmental management

Author:
Pasternack, G.B.,   et al.   ; Gilbert, A.T.; Wheaton, J.M.; Buckland, E.M.;     Show all 4 Authors
Source:
Journal of hydrology 2006 v.328 no.1-2 pp. 227-241
ISSN:
0022-1694
Subject:
simulation models; rivers; gravel; stream flow; fluid mechanics; habitat conservation; shear stress
Abstract:
... Resource managers, scientists, government regulators, and stakeholders are considering sophisticated numerical models for managing complex environmental problems. In this study, observations from a river-rehabilitation experiment involving gravel augmentation and spawning habitat enhancement were used to assess sources and magnitudes of error in depth, velocity, and shear velocity predictions made ...
DOI:
10.1016/j.jhydrol.2005.12.003

8. Temporal instability of parameters in an event-based distributed hydrologic model applied to a small semiarid catchment

Author:
Pasternack, G.B.,   et al.   ; Maneta, M.P.; Wallender, W.W.; Jetten, V.; Schnabel, S.;     Show all 5 Authors
Source:
Journal of hydrology 2007 v.341 no.3-4 pp. 207-221
ISSN:
0022-1694
Subject:
temporal variation; semiarid zones; infiltration (hydrology); watersheds; rain; watershed hydrology; rain intensity; storms; runoff; hydrologic models; Spain
Abstract:
... Event-based hydrologic modeling is common practice for semiarid basins where runoff is restricted to short periods after a storm. Such models are used to predict runoff production and soil erosion in agricultural areas as well as the effects of storms on sewer systems, all in areas with limited information. Sometimes, model parameterization is done through infiltration experiments to obtain a para ...
DOI:
10.1016/j.jhydrol.2007.05.010