Determinant factors of sediment graphs and rating loops in a reforested watershed

Sadeghi, Seyed Hamidreza; Mizuyama, Takahisa; Miyata, Sumiko; Gomi, Takashi; Kosugi, Ken’ichiro; Fukushima, Takehiko; Mizugaki, Shigeru; Onda, Yuichi

doi:10.1016/j.jhydrol.2008.04.005

Cited by 61 publications

(49 citation statements)

References 51 publications

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“…According to equations and rating curves in Table 2, it is also found that, in most cases, other types of models than the power function gave a better performance. This opposes the findings of Walling (1977a,b), Gergov (1996), Cordova & Gonzalez (1997), Phillips et al (1999, Asselman (2000), Kao et al (2005) and Sadeghi et al (2008a), who believed power models to be the most common function that relates SSC to water discharge. However, it agrees with Asselman (2000), Horowitz et al (2001), Horowitz (2003), Sadeghi et al (2006), and Schmidt & Morche (2006), who found that the other types of regression models (e.g.…”

Section: Fitting the Ssc-q Relationshipcontrasting

confidence: 87%

“…Similar findings have also been reported for other locations by Walling (1988), Church & Slaymaker (1989), Lane et al (1997), Terajima et al (1996), Sichingabula (1998), Asselman (2000), Horowitz (2003), Sadeghi et al (2008a) and Wilkinson et al (2009). The poor correlation between SSC and Q data can be attributed to: variation in the temporal rainfall intensity distribution; suspended sediment supply from internal sources (i.e.…”

Section: Fitting the Ssc-q Relationshipsupporting

confidence: 84%

“…Towards this attempt, a sediment sample of 1-L volume was settled for 48 h and then the upper layer water, over settled suspended sediment, was decanted. The settled sediment was then washed by distilled water into the pre-weighed aluminium foil dishes and oven dried at 105 C for 24 h. The dried sediment was then weighed by means of high-precision scales (0.0001 g) and the SSCs were ultimately determined (Putjaroon & Pongboon, 1987;Sadeghi et al, 2006Sadeghi et al, , 2008a.…”

Section: Study Areamentioning

confidence: 99%

“…Sediment yield provides an important index of land degradation, severity and trends, and also reflects the characteristics of a watershed, its history, development, use and management (Lane et al, 1997;Verstraeten & Poesen, 2001;Lu et al, 2005;Sadeghi et al, 2006Sadeghi et al, , 2008a. It is dependent on many controlling variables including: climate, drainage area, soils, geology, topography, vegetation and land use (Mingguo et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Reliability of sediment rating curves for a deciduous forest watershed in Iran

Sadeghi

Pari

2010

Hydrological Sciences Journal

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The suspended sediment load in a river is an indicator of its health. Yet, the direct measurement of suspended sediment load is difficult. Most assessments of suspended sediment load are therefore estimated from relationships developed between suspended sediment concentration and discharge, as sediment rating curves. However, these are not able to provide sufficiently accurate results. The present study aimed to assess the accuracy of the sediment rating curve in the educational forest watershed of Tarbiat Modares University in northern Iran. Water and suspended sediment sampling were conducted via depth-integration at daily and storm-wise scales, and the samples were analysed through decantation procedure. Towards this attempt, various sediment rating curves were examined for different data sets classified on the basis of various governing conditions. The relationships between study variables were assessed by applying a bivariate regression method and descriptive statistics. The results of fitting rating curves on suspended sediment and water discharge, with respective averages of 1.256 AE 2.835 g L -1 and 0.556 AE 0.444 m 3 s -1 , verified that no sediment rating curve could be reliably used for the study area. Scrutinizing the results also verified that the data stratification and increasing time resolution led to better model performance, though their accuracy has not been statistically and logically tested.Key words forest watershed; sediment rating curve; suspended sediment; regression model; Iran Fiabilité des courbes de transport sédimentaire d'un bassin versant forestier feuillu en Iran Résumé La charge de sédiments en suspension dans une rivière est un indicateur de sa santé. Pourtant, la mesure directe de la charge de sédiments en suspension est difficile. Les évaluations de la charge de sédiments en suspension sont donc pour la plupart basées sur des relations développées entre la concentration de sédiments en suspension et le débit, soit les courbes de transport sédimentaire. Toutefois, celles-ci ne donnent pas de résultats suffisamment précis. La présente étude vise à évaluer la précision de transport solide dans le bassin versant forestier pédagogique de l'Université Tarbiat Modares dans le nord de l'Iran. Des prélèvements d'eau et de sédiments en suspension ont été réalisés par intégration verticale, aux pas de temps journalier et événementiel, et les échantillons ont été analysés à travers une procédure de décantation. A l'occasion de cette étude, plusieurs courbes de transport sédimentaire ont été examinées vis-à-vis de différents jeux de données classifiées selon plusieurs règles. Les relations entre les variables de l'étude ont été évaluées en appliquant une méthode de régression bivariée et des statistiques descriptives. Les résultats de l'ajustement de courbes aux dynamiques des sédiments en suspension et des débits liquides, avec des moyennes respectives de 1.256 AE 2.835 g L -1 et de 0.556 AE 0.444 m 3 s -1 , confirment qu'aucune courbe de transport sédimentaire ne peut être étab...

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Section: Fitting the Ssc-q Relationshipcontrasting

confidence: 87%

Section: Fitting the Ssc-q Relationshipsupporting

confidence: 84%

Section: Study Areamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Reliability of sediment rating curves for a deciduous forest watershed in Iran

Sadeghi

Pari

2010

Hydrological Sciences Journal

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“…Flood events of low and medium intensity can also generate high SSCs. This happens depending on the variability in sediment availability within the watershed, rainfall intensity and spatial distribution, discharge, types and distances traveled by water in the main channel, which determine the response of suspended sediment (Williams, 1989;NadalRomero et al, 2008;Sadeghi et al, 2008;Rodrı´guez-Blanco et al, 2010).…”

Section: Ssc Simulation and Yieldmentioning

confidence: 99%

Evaluation of hydrology, suspended sediment and Nickel loads in a small watershed in Basque Country (Northern Spain) using eco-hydrological SWAT model

Peraza-Castro

Ruiz‐Romera

Armenta

et al. 2015

Ann. Limnol. - Int. J. Lim.

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-Suspended sediment transportation and associated pollutants from catchment to stream networks are responsible for aquatic habitat degradation, reservoir sedimentation and the transportation of sediment bound pollutants. Quantifying suspended sediment loads from lands to watercourses is essential in controlling soil erosion and in implementing appropriate mitigation practices to reduce stream sediment and associated pollutant loads, and hence improve surface water quality downstream.The main objective of this study is to evaluate the temporal variability of hydrology, sediment and nickel loads using Soil and Water Assessment Tool in Oka watershed located in north Spain. Model simulation was completed using 11 years historical records (2001-2009 for validation and 2009-2012 for calibration) of streamflow and suspended sediment concentration (SSC). Thestreamflow, SSC and sediment load estimated from the model were compared with observed data using statistical parameters, which indicates a successful simulation. The annual production of simulated sediments shows variability between 662 and 1515 t, with a mean specific yield of 33 t km x2 y x1 . The annual load of nickel simulated ranged from 32 to 72 kg, representing a mean specific of 1.63 kg km x2 year x1 . The information obtained from this research is of interest to understand long term interannual variability of suspended sediment and nickel yield.

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Hysteretic sediment fluxes in rainfall‐driven soil erosion: Particle size effects

Cheraghi

Jomaa

Sander

et al. 2016

Water Resources Research

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A detailed laboratory study was conducted to examine the effects of particle size on hysteretic sediment transport under time‐varying rainfall. A rainfall pattern composed of seven sequential stepwise varying rainfall intensities (30, 37.5, 45, 60, 45, 37.5, and 30 mm h−1), each of 20 min duration, was applied to a 5 m × 2 m soil erosion flume. The soil in the flume was initially dried, ploughed to a depth of 20 cm and had a mechanically smoothed surface. Flow rates and sediment concentration data for seven particle size classes (<2, 2–20, 20–50, 50–100, 100–315, 315–1000, and >1000 µm) were measured in the flume effluent. Clockwise hysteresis loops in the sediment concentration versus discharge curves were measured for the total eroded soil and the finer particle sizes (<2, 2–20, and 20–50 µm). However, for particle sizes greater than 50 µm, hysteresis effects decreased and suspended concentrations tended to vary linearly with discharge. The Hairsine and Rose (HR) soil erosion model agreed well with the experimental data for the total eroded soil and for the finer particle size classes (up to 50 µm). For the larger particle size classes, the model provided reasonable qualitative agreement with the measurements although the fit was poor for the largest size class (>1000 µm). Overall, it is found that hysteresis varies amongst particle sizes and that the predictions of the HR model are consistent with hysteretic behavior of different sediment size classes.

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Determinant factors of sediment graphs and rating loops in a reforested watershed

Cited by 61 publications

References 51 publications

Reliability of sediment rating curves for a deciduous forest watershed in Iran

Reliability of sediment rating curves for a deciduous forest watershed in Iran

Evaluation of hydrology, suspended sediment and Nickel loads in a small watershed in Basque Country (Northern Spain) using eco-hydrological SWAT model

Hysteretic sediment fluxes in rainfall‐driven soil erosion: Particle size effects

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