Modifying WEPP to Improve Streamflow Simulation in a Pacific Northwest Watershed

Srivastava, Anurag; Dobre, Mariana; Wu, Ji; Elliot, William J.; Bruner, Emily A.; Dun, Shuhui; Brooks, Erin S.; Miller, Ina S.

doi:10.13031/2013.42691

Cited by 17 publications

(11 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results are somehow expected since the version of WEPP used in this study did not have a module for computation of base flow. Recent efforts have proposed additional modules for computation of base flow (Srivastava et al ., ), but they were not implemented in the present study.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of the WEPP model and digital elevation grid size, for simulation of streamflow and sediment yield in a heterogeneous catchment

Pieri

Poggio

Vignudelli

et al. 2014

Earth Surf Processes Landf

View full text Add to dashboard Cite

The paper presents the result of an application of the GeoWEPP model in a heterogeneous semi‐agricultural catchment located in the northern Italian Apennines mountain range. The objectives were: (a) to evaluate the GeoWEPP model in a heterogeneous catchment in a Mediterranean climate and (b) to examine the effect of digital elevation model grid size on hydrological and sediment yield simulations. The catchment is characterized by large heterogeneity in geology, soil type, vegetation cover and topography. In addition, 10% of its area is occupied by calanchi (badlands), characterized by steep, bare soil and accentuated erosion. Experimental streamflow data were compared with those simulated by GeoWEPP for a period of eight years and the results were evaluated by means of statistical indices, with the analysis of the flow duration curve. Simulated sediment yields were compared with experimental data for one year. The streamflow cumulative annual results were satisfactory with NSE oscillating between 0.40 and 0.83 and RMSE between 1.1 and 2.9 mm. Also, the performance of the model with daily streamflow data was positive (NSE = 0.68 and RMSE = 1.9 mm). The flow duration curve indicated that GeoWEPP could represent the experimental streamflow for fluxes over 1 mm d−1. The model performance for simulation of sediment yield was satisfactory with both digital elevation models of different grid sizes (NSE = 0.84 and 0.87). Indeed, the sensitivity analysis tests of the model showed that there was no statistically significant improvement in the accuracy of the digital elevation model between 10 and 2 m resolution. These results were confirmed for both streamflow as well as sediment yield. Additional sensitivity analysis of other model parameters performed on the entire catchment and badlands hillslopes showed that bedrock hydraulic conductivity primarily affected the model in both settings. Copyright © 2014 John Wiley & Sons, Ltd.

show abstract

Section: Resultsmentioning

confidence: 99%

Evaluation of the WEPP model and digital elevation grid size, for simulation of streamflow and sediment yield in a heterogeneous catchment

Pieri

Poggio

Vignudelli

et al. 2014

Earth Surf Processes Landf

View full text Add to dashboard Cite

show abstract

“…This study only had observed sediment deposition to compare with the predicted values, as there was no measurement of runoff. The above discussion about WEPP's hydrologic performance shows that others have found the WEPP hydrology is reasonable (Dun et al, 2009;Quinn, 2018;Srivastava et al, 2013Srivastava et al, ,2017, as do the results comparing observed stream flows to estimated stream flows for the unburned gaged watersheds within the Tahoe Basin (Lew et al, 2020). The stated accuracy that erosion prediction model can be no better than plus or minus 50% of the mean Elliot et al (2000) applies to this study, and indeed to any erosion prediction, Sources of error in model inputs and internal assumptions and calculations are common to all erosion prediction tools.…”

Section: Selection Of Soil Erodibility Propertiesmentioning

confidence: 89%

“…Dun et al (2009) had a Nash and Sutcliffe (1970) efficiency of 0.45 for daily runoff values in their study, and Quinn (2018) reported a Nash‐Sutcliffe efficiency of 0.5 for daily runoff estimates. Srivastava et al (2013) calibrated K e values for forests of 50.4 mm h −1 on a 5.5‐ha forested watershed with a silt loam soil in Northern Idaho, USA. In Srivastava et al (2017) values for K e were calibrated to be 102 and 330 mm h −1 on 105‐km 2 forested sandy loam and loamy sand soils in Western Washington, USA.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Spatial simulation of forest road effects on hydrology and soil erosion after a wildfire

Cao

Elliot

Long

2021

Hydrological Processes

View full text Add to dashboard Cite

Post‐fire catchment and water utility managers throughout the world use predictive models to estimate potential erosion risks to aid in evaluating downstream impacts of increased runoff and erosion, and to target critical areas within a fire for applying mitigation practices. Erosion prediction can be complicated by forest road networks. Using novel GIS technology and soil erosion modelling, this study evaluated the effect of roads on surface runoff, erosion and sediment yields following a wildfire and determined that the predictive models were providing reasonable results. The GeoWEPP model was used to simulate onsite erosion and offsite sediment delivery before and after fire disturbance using a 2‐m resolution DEM as the terrain layer. Erosion rates in excess of 4 Mg ha−1 year−1 were predicted mainly from steep moderate and high severity burn areas. Roads influenced surface runoff flow path distributions and sub‐catchment delineations, affecting the spatial distribution of sediment detachment and transport. Roads tended to reduce estimated erosion on slopes below the roads but increases in erosion rates were estimated for road fillslopes. Estimated deposition amounts on roads and in sediment basins were similar to measured amounts. The results confirm that road prisms, culverts and road ditches influence sedimentation processes after wildfire, and they present opportunities to detain eroded sediments.

show abstract

“…To overcome this limitation, new procedures were put in place by automating catchment delineation and using GIS products to specify ash loads. Overcoming this limitation was particularly important given the ongoing increase in the probability of large fires not only in SE Australia (Lindenmayer and Taylor 2020) (Wang et al 2010;Srivastava et al 2013;Brooks et al 2016;Srivastava et al 2017), sediment transport and routing (Srivastava et al 2018), which increase in importance with catchment size (Kampf et al 2020). As the catchment size increases, stream processes become more dominant, and runofferosion models become more reliant on sediment and ash transport models.…”

Section: Accepted Articlementioning

confidence: 99%

Designing tools to predict and mitigate impacts on water quality following the Australian 2019/2020 wildfires: Insights from Sydney's largest water supply catchment

Neris

Santín

Lew

et al. 2021

Integr Envir Assess & Manag

View full text Add to dashboard Cite

show abstract

Modifying WEPP to Improve Streamflow Simulation in a Pacific Northwest Watershed

Cited by 17 publications

References 0 publications

Evaluation of the WEPP model and digital elevation grid size, for simulation of streamflow and sediment yield in a heterogeneous catchment

Evaluation of the WEPP model and digital elevation grid size, for simulation of streamflow and sediment yield in a heterogeneous catchment

Spatial simulation of forest road effects on hydrology and soil erosion after a wildfire

Designing tools to predict and mitigate impacts on water quality following the Australian 2019/2020 wildfires: Insights from Sydney's largest water supply catchment

Contact Info

Product

Resources

About