The impact of parameter lumping and geometric simplification in modelling runoff and erosion in the shrublands of southeast Arizona

Canfield, H. Evan; Goodrich, David C.

doi:10.1002/hyp.5896

Cited by 28 publications

(23 citation statements)

References 36 publications

(22 reference statements)

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“…In these studies, the model was tested mainly for predicting runoff and sediment yield on a monthly and annual basis. A few studies on the application of SWAT model for developing the best management scenarios for critical erosion-prone areas of the catchment have been also reported (Tripathi et al, 2004;Mapfumo et al, 2004;Lenhart et al, 2005;Canfield and Goodrich, 2006).…”

Section: Introductionmentioning

confidence: 92%

Assessment of runoff and sediment yield in the Miyun Reservoir catchment by using SWAT model

Pang

Liu

et al. 2009

Hydrological Processes

121

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Abstract:The Soil and Water Assessment Tool (SWAT) was used to simulate the transport of runoff and sediment into the Miyun Reservoir, Beijing in this study. The main objective was to validate the performance of SWAT and the feasibility of using this model as a simulator of runoff and sediment transport processes at a catchment scale in arid and semi-arid area in North China, and related processes affecting water quantity and soil erosion in the catchment were simulated. The investigation was conducted using a 6-year historical streamflow and sediment record from 1986 to 1991; the data from 1986 to 1988 was used for calibration and that from 1989 to 1991 for validation. The SWAT generally performs well and could accurately simulate both daily and monthly runoff and sediment yield. The simulated daily and monthly runoff matched the observed values satisfactorily, with a Nash-Sutcliffe coefficient of greater than 0Ð6, 0Ð9 and a coefficient of determination 0Ð75, 0Ð9 at two outlet stations (Xiahui and Zhangjiafen stations) during calibration. These values were 0Ð6, 0Ð85 and 0Ð6, 0Ð9 during validation. For sediment simulation, the efficiency is lower than that for runoff. Even so, the Nash-Sutcliffe coefficient and coefficient of determination were greater than 0Ð48 and 0Ð6 for monthly sediment yield during calibration, and these values were greater than 0Ð84 and 0Ð95 during validation. Sensitivity analysis shows that sensitive parameters for the simulation of discharge and sediment yield include curve number, base flow alpha factor, soil evaporation compensation factor, soil available water capacity, soil profile depth, surface flow lag time and channel re-entrained linear parameter, etc.

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Section: Introductionmentioning

confidence: 92%

Assessment of runoff and sediment yield in the Miyun Reservoir catchment by using SWAT model

Pang

Liu

et al. 2009

Hydrological Processes

121

View full text Add to dashboard Cite

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“…The effective lumping scale was also examined based on multiple simulations by dividing the catchment into sub-catchments of different sizes and by treating the catchment with different land-use scenarios. Such assessment is essential because a hydrological model performance is often scale dependent (Koren et al, 1999;Carpenter and Georgakakos, 2006) and likely more complicated for sediment transport models (Lu et al, 2005;Birkinshaw and Bathurst, 2006;Canfield and Goodrich, 2006). Furthermore, the most effective model scale depends on the model formulation and the model output being examined (Kalin et al, 2003).…”

Section: Introductionmentioning

confidence: 98%

Spatial lumping of a distributed rainfall‐sediment‐runoff model and its effective lumping scale

Apip

Sayama²,

Tachikawa

et al. 2011

Hydrological Processes

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Abstract:This paper proposes a method to spatially lump a distributed rainfall-sediment-runoff model at the catchment scale. Based on a kinematic wave rainfall-sediment-runoff model, the proposed method spatially integrates (1) a rainfall-runoff model that simulates unsaturated, saturated subsurface and surface runoff processes and (2) a rainfall-sediment-runoff model that simulates soil erosion and transport processes induced by raindrops and surface flow detachment, respectively. The method deductively derives a set of lumped equations that relates the streamflow discharge and the catchment storage of water and sediment, which are then used together with continuity equations to predict the sediment runoff fluxes from the catchment outlet. The main advantage of the method is that the derived lumped model parameters are reflected by the spatially distributed topographical and soil property information, and yet the model can be implemented with a much less computational load compared to the original distributed model. Thus, the model gives a possibility of its numerous applications À such as the application to real-time flood forecasting, sediment yield-flood prediction for hydraulical structure designing, and for a climate change impact analysis on hydrological responses À coupled with the risk and uncertainty analyses which require a number of simulations. The developed lumped model successfully simulated the original distributed model outputs, as well as the observed streamflow and sediment at the Lesti River Catchment (381 km 2 ), a tributary of the Brantas River Basin in Indonesia. After validating the proposed lumped model, the most effective lumping scale was then investigated by conducting multiple simulations, the results of which suggested that approximately 200 km 2 is the ideal lumping scale for this model.

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“…An example of a simple model that conforms to this implicit use of geomorphic data is the overland flow and sediment transport model KINEROS Smith et al, 1995;Canfield and Goodrich, 2006). In this model, the channel network is broken up into individual channel links, each represented by a "channel" model element having a single, characteristic length, cross-sectional geometry, and slope.…”

Section: Introductionmentioning

confidence: 99%

Curvature distribution within hillslopes and catchments and its effect on the hydrological response

Bogaart

Troch

2006

Hydrol. Earth Syst. Sci.

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Abstract. Topographic convergence and divergence are first order controls on the hillslope and catchment hydrological response, as evidenced by similarity parameter analyses. Hydrological models often do not take convergence as measured by contour curvature directly into account; instead they use comparable measures like the topographic index, or the hillslope width function. This paper focuses on the question how hillslope width functions and contour curvature are related within the Plynlimon catchments, Wales. It is shown that the total width function of all hillslopes combined suggest that the catchments are divergent in overall shape, which is in contrast to the perception that catchments should be overall convergent. This so-called convergence paradox is explained by the effect of skewed curvature distributions and extreme curvatures near the channel network. The hillslopestorage Bossiness (hsB) model is used to asses the effect of within-hillslope convergence variability on the hydrological response. It is concluded that this effect is small, even when the soil saturation threshold is exceeded. Also described in this paper is a novel algorithm to compute flow path lengths on hillslopes towards the drainage network, using the multidirectional flow redistribution method.

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The impact of parameter lumping and geometric simplification in modelling runoff and erosion in the shrublands of southeast Arizona

Cited by 28 publications

References 36 publications

Assessment of runoff and sediment yield in the Miyun Reservoir catchment by using SWAT model

Assessment of runoff and sediment yield in the Miyun Reservoir catchment by using SWAT model

Spatial lumping of a distributed rainfall‐sediment‐runoff model and its effective lumping scale

Curvature distribution within hillslopes and catchments and its effect on the hydrological response

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