Sediment transport at gaging stations near Mount St. Helens, Washington, 1980-90. Data collection and analysis

Dinehart, R.L.

doi:10.3133/pp1573

Cited by 30 publications

(33 citation statements)

References 25 publications

(55 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Sediment flux measurements from rivers are important for evaluating terrestrial organic and inorganic material export, landscape denudation, geomorphic change, habitat and water quality, and inputs to reservoir and coastal systems. Rates of sediment discharge are related to the sources, transport and storage of sediment within a watershed, which are in turn related to tectonic regime, climate, land cover, land use, and river setting [ Milliman and Syvitski , 1992; Dinehart , 1998; Trimble , 1997, 1999; Burbank and Anderson , 2001; Yang et al , 2005]. Global inventories of river discharge suggest that both accelerated rates of soil erosion and trapping of sediment by dams have altered these fluxes during recent decades [ Walling and Fang , 2003; Syvitski et al , 2005].…”

Section: Introductionmentioning

confidence: 99%

Suspended‐sediment rating curve response to urbanization and wildfire, Santa Ana River, California

Warrick¹,

Rubin²

2007

J. Geophys. Res.

103

View full text Add to dashboard Cite

[1] River suspended-sediment concentrations provide insights to the erosion and transport of materials from a landscape, and changes in concentrations with time may result from landscape processes or human disturbance. Here we show that suspended-sediment concentrations in the Santa Ana River, California, decreased 20-fold with respect to discharge during a 34-year period (1968À2001). These decreases cannot be attributed to changes in sampling technique or timing, nor to event or seasonal hysteresis. Annual peak and total discharge, however, reveal sixfold increases over the 34-year record, which largely explain the decreases in sediment concentration by a nonlinear dilution process. The hydrological changes were related to the widespread urbanization of the watershed, which resulted in increases in storm water discharge without detectable alteration of sediment discharge, thus reducing suspended-sediment concentrations. Periodic upland wildfire significantly increased water discharge, sediment discharge, and suspendedsediment concentrations and thus further altered the rating curve with time. Our results suggest that previous inventories of southern California sediment flux, which assume time-constant rating curves and extend these curves beyond the sampling history, may have substantially overestimated loads during the most recent decades.

show abstract

Section: Introductionmentioning

confidence: 99%

Suspended‐sediment rating curve response to urbanization and wildfire, Santa Ana River, California

Warrick¹,

Rubin²

2007

J. Geophys. Res.

103

View full text Add to dashboard Cite

show abstract

“…1) due to increased runoff and erosion from hillslopes mantled with fine-grained tephra, the destruction of stabilizing vegetation, and accompanying channel changes (Swanson et al, 1983;Collins and Dunne, 1986;Leavesley et al, 1989;Smith and Lowe, 1991;Pierson et al, 1992Pierson et al, , 1996Major et al, 1996). Although high erosion rates were previously described at several volcanoes (Segerstrom, 1950(Segerstrom, , 1960(Segerstrom, , 1966Waldron, 1967;Ollier and Brown, 1971), detailed work following the 1980 eruption of Mount St. Helens increased recognition of the potential impacts of explosive eruptions on the hydrology of the surrounding landscape (Lisle et al, 1983;Swanson et al, 1983;Janda et al, 1984a,b;Collins and Dunne, 1986;Meyer and Martinson, 1989;Dinehart, 1998;Simon, 1999;Major et al, 2000). Since then, studies at Galunggung volcano in Indonesia (Hamidi, 1989;Hirao and Yoshida, 1989); Usu, Unzen, and Sakurajima in Japan (Watanabe and Ikeya, 1981;Kadomura et al, 1983;Shimokawa and Taniguchi, 1983;Chinen and Kadomura, 1986;Mizuyama and Kobashi, 1996); Ruapehu volcano in New Zealand (Cronin et al, 1999;Hodgson and Manville, 1999); Parícutin in Mexico (Inbar et al, 1994); and Mayon volcano and Mount Pinatubo in the Philippines have addressed the hydrologic response following explosive volcanic eruptions (Rodolfo, 1989;Rodolfo and Arguden, 1991;Pierson et al, 1992…”

Section: Introductionmentioning

confidence: 99%

“…Initially, most sediment from Mount Pinatubo was transported in lahars, hyperconcentrated to debris flows of volcanic material . However, as hillslopes stabilized and revegetated and the channel network reestablished, the threshold rain- 1991(PHIVOLCS, personal communication, 1998, the Toutle River draining Mount St. Helens, 1980-1984(Dinehart, 1998, and the S. Cikunir River draining Galunggung volcano in Indonesia, 1982-1985(Hirao and Yoshida, 1989, indicating significantly higher sediment yields in the first 4 years following explosive volcanic eruptions than in 280 rivers not impacted by volcanic eruptions (Milliman and Syvitski, 1992). Values plotted for Pinatubo and Galunggung were calculated from annual accumulated deposit volumes converted using average bulk deposit densities of 1.3 g/ cm 3 , and underrepresent the total sediment yields since they are based solely on terrestrial overbank deposits.…”

Section: The 1991 Eruption Of Mount Pinatubo and Physiographic Settingmentioning

confidence: 99%

Fluvial sediment transport and deposition following the 1991 eruption of Mount Pinatubo

Hayes¹,

Montgomery²,

Newhall³

2002

Geomorphology

125

View full text Add to dashboard Cite

The 1991 eruption of Mount Pinatubo generated extreme sediment yields from watersheds heavily impacted by pyroclastic flows. Bedload sampling in the Pasig -Potrero River, one of the most heavily impacted rivers, revealed negligible critical shear stress and very high transport rates that reflected an essentially unlimited sediment supply and the enhanced mobility of particles moving over a smooth, fine-grained bed. Dimensionless bedload transport rates in the Pasig -Potrero River differed substantially from those previously reported for rivers in temperate regions for the same dimensionless shear stress, but were similar to rates identified in rivers on other volcanoes and ephemeral streams in arid environments. The similarity between volcanically disturbed and arid rivers appears to arise from the lack of an armored bed surface due to very high relative sediment supply; in arid rivers, this is attributed to a flashy hydrograph, whereas volcanically disturbed rivers lack armoring due to sustained high rates of sediment delivery. This work suggests that the increases in sediment supply accompanying massive disturbance induce morphologic and hydrologic changes that temporarily enhance transport efficiency until the watershed recovers and sediment supply is reduced. D

show abstract

“…Existem métodos diretos e indiretos para a determinação da descarga sólida total de uma seção, porém, devido à dificuldade de obtenção de dados e aos custos envolvidos, os indiretos são os mais utilizados. Segundo Dinehart (1997), os dados comumente requeridos para o uso de métodos indiretos de cálculo da descarga sólida total são: a vazão líquida, a concentração de sedimentos em suspensão, a distribuição granulométrica dos sedimentos em suspensão, a distribuição granulométrica dos sedimentos do leito, a declividade da linha d'água e a temperatura da água. Os métodos apresentados por Einstein (1950), por Colby & Hembree (1955) e por Stevens & Yang (1989), que estão entre os mais utilizados, confirmam a colocação de Dinehart (1997).…”

Section: Introductionunclassified

Seleção de modelos para o traçado de curvas granulométricas de sedimentos em suspensão em rios

Lima

Silva

2007

Rev. bras. eng. agríc. ambient.

View full text Add to dashboard Cite

RESUMOO conhecimento da distribuição granulométrica dos sedimentos em suspensão em cursos d'água é fundamental para a realização de estudos hidrossedimentológicos. As técnicas geralmente utilizadas para a avaliação da distribuição granulométrica de amostras de sedimentos resultam em valores pontuais, dependendo de posterior interpolação para o traçado da curva granulométrica e para a obtenção de diâmetros característicos específicos. A transformação de valores pontuais em funções contínuas pode ser realizada por meio de modelos matemáticos; entretanto, são poucos os estudos desenvolvidos com a finalidade de determinar o melhor modelo para o ajuste de curvas granulométricas. Neste trabalho, objetivou-se a seleção de modelos para o traçado de curvas granulométricas de sedimentos em suspensão em rios; utilizando-se 30 amostras contendo de 8 a 10 pontos medidos, testaram-se 14 diferentes modelos. A comparação entre os modelos foi baseada na diferença da soma do quadrado dos erros entre os valores observados e os ajustados, cujos resultados indicaram que os modelos Haverkamp & Parlange (1986) e Skaggs et al. (2001), ambos com 3 parâmetros de ajuste, são os melhores para o traçado das curvas granulométricas de amostras de sedimentos em suspensão em rios.Palavras-chave: hidrossedimentologia, hidrossedimentometria, curvas de crescimento Selection of models for adjusting particle size distribution curves of suspended sediments in river ABSTRACTThe knowledge about particle-size distribution of suspended sediments in river is fundamental for some hydrosedimentological studies. In general, the techniques used to determine the particle-size distribution of a sample results in pointwise values, demanding a subsequent interpolation to fit the complete particle-size distribution curve and to obtain specific characteristic diameters values. The transformation of discrete points into continuous functions can be made by mathematical models. However, few studies have been developed with the purpose of determining the best model for fitting particle-size distribution curves. The objective of this paper was to select models for fitting particlesize distribution curves of suspended sediments in river water. Using the particle-size distribution, results from 30 samples of suspended sediments of river with 8 to 10 measured points, with 14 different models were tested. The parameter used to compare the models was the sum of the square errors between the measured and calculated values obtained in the adjustment of each model. The results showed that the Haverkamp & Parlange (1986) and Skaggs et al. (2001) models, both with three fitting parameters, are the best for adjusting particle-size distribution curves of river suspended sediment samples.

show abstract

Sediment transport at gaging stations near Mount St. Helens, Washington, 1980-90. Data collection and analysis

Cited by 30 publications

References 25 publications

Suspended‐sediment rating curve response to urbanization and wildfire, Santa Ana River, California

Suspended‐sediment rating curve response to urbanization and wildfire, Santa Ana River, California

Fluvial sediment transport and deposition following the 1991 eruption of Mount Pinatubo

Seleção de modelos para o traçado de curvas granulométricas de sedimentos em suspensão em rios

Contact Info

Product

Resources

About