A study on synthetic sedimentgraphs for ungaged watersheds

Chen, V.J.; Kuo, Chin Y.

doi:10.1016/0022-1694(86)90043-0

Cited by 16 publications

(11 citation statements)

References 6 publications

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“…A sediment routing function, using travel time and sediment particle size, was used to determine the SCD. The concept of IUSG was also employed by Singh et al (1982Singh et al ( , 1989Singh et al ( , 1992, Chen and Kuo (1984), and Srivastava et al (1984) among others. Lee and Singh (1999) analyzed sediment yield by coupling Kalman filter with the IUSG.…”

Section: Introductionmentioning

confidence: 92%

Tank Model for Sediment Yield

Lee

Singh

2005

Water Resour Manage

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A tank model consisting of three tanks was developed for prediction of runoff and sediment yield. The sediment yield of each tank was computed by multiplying the total sediment yield by the sediment yield coefficients; the yield was obtained by the product of the runoff of each tank and the sediment concentration in the tank. The sediment concentration of the first tank was computed from its storage and the sediment concentration distribution (SCD); the sediment concentration of the next lower tank was obtained by its storage and the sediment infiltration of the upper tank; and so on. The SCD, caused by the incremental source runoff (or the effective rainfall), was obtained by the theory of the instantaneous unit sediment graph (IUSG) and a sediment routing function. Using the SCD, the sediment yield was computed from the tank model as well as by the IUSG model. The sediment yield obtained from the tank model was then compared with that from the IUSG model. Finally, the tank model was verified on an upland watershed in northwestern Mississippi. Nomenclature= infiltration and sediment infiltration coefficients of the first, the second, the third tank, 1/h and dimensionless A1, A2, A3 = runoff and sediment yield coefficients of the first tank, 1/h and dimensionless b = proportionality constant relating initial sediment concentration and shear stress B1, C1= runoff and sediment yield coefficient of the second tank and the third tank, 1/h and dimensionless C = crop management factor C 0 = initial sediment concentration for one unit of runoff, metric tons/m 3 C(t) = SCD at any time, metric tons/m 3 CON1, CON2, CON3 = sediment concentrations of the first, the second, the third tank, mg/L d = median sediment particle diameter, microns f 1 , f 2 , and f 3 = infiltration rates of the first, the second, the third tank, mm/h h(t) = IUH ordinate, m 3 /s HA1, HA2, HA3 = heights of runoff outlets (orifices) of the first tank, mm HB, HC = height of runoff outlet (orifice) of the second, the third tank, mm 350 Y. H. LEE AND V. P. SINGH h s (t) = IUSG ordinate, metric tons/h K = soil erodibility factor LS = slope length and gradient factor m = number of source runoff increments P = erosion control practice factor Q 1 , Q 2 , Q 3 = surface runoff from the first tank, cubic meters per second Q 4 = intermediate runoff (or interflow) from the second tank, m 3 /s Q 5 = groundwater runoff from the third tank, m 3 /s q p = peak flow rate, m 3 /s Q p = peak source runoff rate, m 3 /s r = hydraulic radius, cm R = rainfall intensity, mm/h S = bed slope S1, S2, S3= storage of the first, the second, the third tank, mm SY 1 , SY 2 , SY 3 = surface sediment yield of the first tank, tons/day SY 4 = intermediate sediment yield of the second tank, tons/day SY 5 = groundwater sediment yield of the third tank, tons/day SYf 1 , SYf 2 , SYf 3 = sediment infiltration rates of the first, the second, the third tank, tons/day T = travel time between the two sections, hours T p = watershed time to peak, hours U i = sediment yield from each source runoff i...

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Section: Introductionmentioning

confidence: 92%

Tank Model for Sediment Yield

Lee

Singh

2005

Water Resour Manage

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“…Secondly, the method cannot be used on ungauged watersheds (Gracia-Sanchez 1996). On the other hand, to derive sediment graphs directly from rainfall of a storm, the regression type relations (between the effective rainfall and mobilized sediment) are in frequent use (Chen and Kuo 1986;Kumar and Rastogi 1987;Raghuwanshi et al 1994Raghuwanshi et al , 1996Sharma et al 1992;Sharma and Murthy 1996). The IUSG model based on linear reservoir concept of Nash (1957) has been employed by Kumar and Rastogi (1987), Sharma et al (1992) and Sharma and Murthy (1996).…”

Section: Introductionmentioning

confidence: 99%

A Simple Conceptual Model of Sediment Yield

Bhunya

Jain

Singh

et al. 2009

Water Resour Manage

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The sediment graphs (time distribution of sediment yield) are very essential if the sediment transports the pollutants that are toxic at high concentrations, requiring determination of peak, rather than average sediment flow rate. In this paper, an effort has been made to develop a simple conceptual model of sediment yield based on Soil Conservation Service Curve Number (SCS-CN) method, instantaneous unit sediment graph (IUSG) method, and Power law and the performance is tested using real field data of Chaukhutia watershed of Ramganga river catchment (area = 452.25 km 2 ). The proposed model is found to provide realistic estimates of temporal variation of sediment yield as well as total sediment yield during a storm event. The model is found to be most sensitive to parameter β followed by k, α, A, and n s . A comparison is made with the existing IUSG based models of Kumar and Rastogi (J Hydrol 95:155-163, 1987) and Raghuwanshi et al. (J Hydraul Eng ASCE 120(4): 495-503, 1994) for developing sediment graphs.

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“…The assumption that the IUSG varies linearly with source runoff volume is questionable. Chen and Kuo (1986) propose a procedure to generate synthetic unit sedimentgraphs (USG). In this case correlation analysis is used to relate the principal sedimentgraph parameters to the main watershed characteristics and it is therefore feasible to synthesize the unit sedimentgraph for an ungauged watershed.…”

Section: Introductionmentioning

confidence: 99%

Generation of Synthetic Sedimentgraphs

Gracia-Sánchez

1996

Hydrol. Process.

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A procedure for deriving sedimentgraphs in watersheds is proposed. The method is based on the instantaneous unit hydrograph theory developed for flood prediction and on the convolution integral theory. This procedure could be applied to any watershed where basic physical information is available (areas, slopes, length of channels, soil type). A qualitative comparison between results obtained and those published previously produced satisfactory results. Thus it is possible to conclude that the procedure is adequate. However, it is also necessary to compare it with real field measurements.

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A study on synthetic sedimentgraphs for ungaged watersheds

Cited by 16 publications

References 6 publications

Tank Model for Sediment Yield

Tank Model for Sediment Yield

A Simple Conceptual Model of Sediment Yield

Generation of Synthetic Sedimentgraphs

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