Bedload Transport of Sediments and Morphodynamics in the Northern Gulf of California

Hernández-Azcúnaga, Leonardo; Carbajal, Noel; Montaño-Ley, Yovani

doi:10.2112/jcoastres-d-13-00026.1

Cited by 4 publications

(4 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This has created a different sedimentary regime in the Upper Gulf, which may have caused localized decrease in abundance of M. modesta. Sediment mobilization and bedforms in the Northern Gulf are strongly controlled by tidal dynamics (Hernández-Azcúnaga et al 2014).…”

Section: The "Delta Clam"mentioning

confidence: 99%

“…And, an estimated 50 to 500 million metric tons of sediment might have been delivered annually to the delta, although the amounts of 135, 160 and 180 million tons are most commonly cited (van Andel and Shor 1964, Milliman and Meade 1983, Minckley 1991, Morrison et al 1996, Carriquiry and Sánchez 1999, Alles 2011. Montaño (2003), Montaño andCarbajal (2008), andHernández-Azcúnaga et al (2014) estimated that the river contributed more than 50% of the total sediment brought to the Northern Gulf, the remainder resulting from wave erosion of the low cliffs and alluvial shores along the coastline of Sonora beginning about five million years ago, when the Colorado River and Upper Gulf probably first encountered one another. Despite the decrease in Colorado River flow into the Northern Gulf, Baba et al (1991) found no change in the mass accumulation rate of sediments, noting that these are supplied from other sources and from resuspension of ancient deltaic sediments of the Colorado River Delta.…”

Section: Introductionmentioning

confidence: 99%

“…The main source of suspended sediments in the Northern Gulf today is thus from erosion or resuspension of ancient delta deposits (Carriquiry 1993, Carriquiry and Sánchez 1999, Carriquiry et al 2001, 2011, Álvarez and Jones 2002, Alles 2011). Most of the seafloor of the Northern Gulf is carpeted with nonconsolidated deposits that originated from the delta, with the finer sediments occurring mainly on its western side and the coarser sediments on its eastern (Sonoran) side (Carriquiry and Sánchez 1999, Carriquiry et al 2001, Hernández-Azcúnaga et al 2014. During spring tides, when tidal currents are strong, the resulting turbulence in the water column resuspends and scatters these sediments to such an extent that they become visible to satellite imagery, especially in the uppermost Gulf and Bahías Adair and San Jorge on the northwest coast of Sonora (Lepley et al 1975, Carabajal et al 1997, Souza et al 2004, Hernández-Azcúnaga et al 2014.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Colorado River flow and biological productivity in the Northern Gulf of California, Mexico

Brusca

Alvarez-Borrego

Hastings

et al. 2017

Earth-Science Reviews

View full text Add to dashboard Cite

A review of published research indicates that the Northern Gulf of California is, historically and currently, one of the most biologically productive marine regions on Earth. This high productivity is driven by a unique mix of factors, including: coastal upwelling, wind-driven mixing, extreme tidal mixing and turbulence, thermohaline circulation that moves intermediate waters into the mixed layer, coastal-trapped waves, regular sediment resuspension, and, to a lesser extent, agricultural runoff, released nutrients from erosion of ancient Colorado River Delta

show abstract

Section: The "Delta Clam"mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Colorado River flow and biological productivity in the Northern Gulf of California, Mexico

Brusca

Alvarez-Borrego

Hastings

et al. 2017

Earth-Science Reviews

View full text Add to dashboard Cite

show abstract

“…Thus, another missing piece in this study is a salinity test of the two fish species, which would be one reasonable way to test their hypothesis. Instead of salinity, perhaps C. regis avoids the Upper Gulf because of the heavy suspended sediment load that characterizes the region (Thunnell 1998;Hernández-Azcúnaga et al 2014). Or perhaps by seawater temperatures, given that the shallow Upper Gulf gets so much colder than the rest of the Gulf in the winter (LluchCota et al 2007,;Brusca et al 2017).…”

mentioning

confidence: 99%

Lax science can have negative impacts on conservation: A rebuttal to Lau and Jacobs (2017)

Brusca

2018

Preprint

View full text Add to dashboard Cite

A recent paper by Lau and Jacobs (2017, PeerJ) negatively contributes to a critical conservation problem in the Gulf of California—better regulation of fisheries in the Upper Gulf of California. The paper’s broader conclusions are not supported by the data presented, and numerous assumptions and claims regarding previous work are misstated or incorrect, including claims of sister-group relationship between Colpichthys hubbsi and C. regis and an implied sister group relationship between Uca monilifera and Uca princeps, claims regarding Colorado River water flow to the Gulf of California, and claims of post-dam “significantly different adaptive regimes on taxa in the [Upper Gulf].”

show abstract

Riverbed Micromorphology of the Yangtze River Estuary, China

Cheng

et al. 2016

Water

View full text Add to dashboard Cite

Dunes are present in nearly all fluvial channels and are vital in understanding sediment transport, deposition, and flow conditions during floods of rivers and estuaries. This information is pertinent for helping developing management practices to reduce risks in river transportation and engineering. Although a few recent studies have investigated the micromorphology of a portion of the Yangtze River estuary in China, our understanding of dune development in this large estuary is incomplete. It is also poorly understood how the development and characteristics of these dunes have been associated with human activities in the upper reach of the Yangtze River and two large-scale engineering projects in the estuarine zone. This study analyzed the feature in micromorphology of the entire Yangtze River estuary bed over the past three years and assessed the morphological response of the dunes to recent human activities. In 2012, 2014, and 2015, multi-beam bathymetric measurements were conducted on the channel surface of the Yangtze River estuary. The images were analyzed to characterize the subaqueous dunes and detect their changes over time. Bottom sediment samples were collected for grain size analysis to assess the physical properties of the dunes. We found that dunes in the Yangtze River estuary can be classified in four major classes: very large dunes, large dunes, medium dunes, and small dunes. Large dunes were predominant, amounting to 51.5%. There was a large area of dunes developed in the middle and upper reaches of the Yangtze River estuary and in the Hengsha Passage. A small area of dunes was observed for the first time in the turbidity maximum zone of the Yangtze River estuary. These dunes varied from 0.12 to 3.12 m in height with a wide range of wavelength from 2.83 to 127.89 m, yielding a range in height to wavelength of 0.003-0.136. Sharp leeside slope angles suggest that the steep slopes of asymmetrical dunes in the middle and upper reaches, and the turbidity maximum zone of the Yangtze River estuary face predominantly towards tides because of the ebb-dominated currents. Sharp windward slope angles in the lower reach of the North Passage show the influence of flood-dominated currents on dunes. It is likely that the scale of dunes will increase in the future in the South Channel because of a sharp decline of sediment discharge caused by recent human activities.

show abstract

Bedload Transport of Sediments and Morphodynamics in the Northern Gulf of California

Cited by 4 publications

References 24 publications

Colorado River flow and biological productivity in the Northern Gulf of California, Mexico

Colorado River flow and biological productivity in the Northern Gulf of California, Mexico

Lax science can have negative impacts on conservation: A rebuttal to Lau and Jacobs (2017)

Riverbed Micromorphology of the Yangtze River Estuary, China

Contact Info

Product

Resources

About