Impact of model simplifications on soil erosion predictions: application of the GLUE methodology to a distributed event-based model at the hillslope scale

2015 ◽  
Vol 30 (7) ◽  
pp. 1096-1113 ◽  
Author(s):  
Luis Cea ◽  
Cedric Legout ◽  
Thomas Grangeon ◽  
Guillaume Nord
Keyword(s):  
Soil Erosion ◽  
Event Based ◽  
Hillslope Scale

Implications of model uncertainty for the mapping of hillslope-scale soil erosion predictions

2001 ◽  
Vol 26 (12) ◽  
pp. 1333-1352 ◽  
Author(s):  
Richard E. Brazier ◽  
Keith J. Beven ◽  
Steven G. Anthony ◽  
John S. Rowan
Keyword(s):  
Soil Erosion ◽  
Model Uncertainty ◽  
Hillslope Scale

Modeling the sediment yield and the impact of vegetated filters using an event-based soil erosion model-a case study of a small Canadian watershed

2016 ◽  
Vol 30 (16) ◽  
pp. 2835-2850 ◽  
Author(s):  
Gabriel Hould-Gosselin ◽  
Alain N. Rousseau ◽  
Silvio J. Gumiere ◽  
Dennis W. Hallema ◽  
Claudie Ratté-Fortin ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Sediment Yield ◽  
Erosion Model ◽  
Event Based ◽  
The Impact

scholarly journals Influences of conservation measures on runoff and sediment yield in different intra-event-based flood regimes in the Chabagou watershed

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Shan-Shan Wang ◽  
Zhan-Bin Li ◽  
Le-Tao Zhang ◽  
Bo Ma
Keyword(s):  
Soil Erosion ◽  
Loess Plateau ◽  
Sediment Yield ◽  
Suspended Sediment Concentration ◽  
Sediment Concentration ◽  
The Loess Plateau ◽  
Flood Duration ◽  
Conservation Measures ◽  
Event Based ◽  
Measurement Period

AbstractThe Loess Plateau in China has suffered severe soil erosion. To control soil erosion, extensive conservation measures aimed at redistributing rainfall, hindering flow velocity and intercepting sediment were implemented on the Loess Plateau. To accurately evaluate the combined effect of conservation measures in the Chabagou watershed, this study classified intra-event-based floods into four regimes via cluster and discriminant analyses. Regime A was characterized by short flood duration and low erosive energy, regime B was characterized by short flood duration and high erosive energy, regime C was characterized by long flood duration and low erosive energy, and regime D was characterized by long flood duration and high erosive energy. The results indicated that peak discharge (qp), runoff depth (H), mean discharge (qm), and runoff erosion power (E) decreased by 75.2%, 56.0%, 68.0% and 89.2%, respectively, in response to conservation measures. Moreover, area-specific sediment yield (SSY), average suspended sediment concentration (SCE), and maximum suspended sediment concentration (MSCE) decreased by 69.2%, 33.3% and 11.9%, respectively, due to conservation measures. The nonlinear regression analysis revealed a power function relationship between SSY and E in both the baseline (1961–1969) and measurement period (1971–1990) in all regimes. Conservation measures reduced sediment yield by not only reducing the runoff amount and soil erosion energy but also transforming the flood regime, for example, transforming a high-sediment-yield regime into a low-sediment-yield regime. Moreover, conservation measures altered the SSY-E relationship in regime A, whereas no obvious difference in regime B or C/D was observed between the measurement period and the baseline period. This study provides a better understanding of the mechanism of runoff regulation and the sediment yield reduction under comprehensive conservation measures in a small watershed on the Chinese Loess Plateau.

scholarly journals Using Rose’ and Manning’s Equations to Spatially Quantify Soil Erosion in Lagawe River Sub- Watershed, Ifugao, Philippines

2021 ◽  
Vol 24 (1) ◽  
pp. 45-55
Author(s):  
Victorino Bato ◽  
◽  
Eduardo Paningbatan, Jr. ◽  
Victor Ella ◽  
Antonio Alcantara ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Sediment Yield ◽  
Stream Flow ◽  
Rain Gauge ◽  
P Value ◽  
Sediment Mass ◽  
Significant Difference ◽  
Level Recorder ◽  
Event Based ◽  
Water Level Recorder

A dynamic, physical model was created to predict soil erosion of Lagawe River Sub-watershed, a sub-watershed of Magat River Watershed, Philippines. Tipping-bucket rain gauge was installed to gather event-based rainfall data and a water-level recorder was installed on a straight segment of Lagawe River to gather water depth. Sediment samples were taken during rainstorm events and were used to calibrate the model. Manning’s equation was used to calculate surface runoff and stream flow velocity. Rose’ and Freebairn’s Equation was used to calculate sediment mass. Geographic Information System was utilized as a tool for modelling using PCRaster Software. The model estimated a total of 57,905,000 m3 of eroded sediments which was generated during Typhoon Koppu (local name, Lando) in year 2015. A Welch Two Sample t-value of -0.25 and a p-value of 0.81 was achieved on the statistical analysis between the measured sediment yield and the output of the model. Since the p-value is greater than 0.05 (5%), there is no significant difference between the output of the physical dynamic model and the measured value for sediment yield. Likewise, the correlation analysis supports this conclusion with a linearly positive R2 value of 0.74.

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