Initial abstraction and curve numbers for semiarid watersheds in Southeastern Arizona

2012 ◽  
Vol 28 (3) ◽  
pp. 774-783 ◽  
Author(s):  
Yongping Yuan ◽  
Wenming Nie ◽  
Steven C. McCutcheon ◽  
Encarnación V. Taguas
Keyword(s):  
Initial Abstraction ◽  
Semiarid Watersheds

scholarly journals Initial abstraction ratio and Curve Number estimation using rainfall and runoff data from a tropical watershed

RBRH ◽  
2019 ◽  
Vol 24 ◽  
Author(s):  
Luiz Claudio Galvão do Valle Junior ◽  
Dulce Buchala Bicca Rodrigues ◽  
Paulo Tarso Sanches de Oliveira
Keyword(s):  
Conversion Factor ◽  
Poor Performance ◽  
Curve Number ◽  
Storm Events ◽  
Rainfall Runoff ◽  
Initial Abstraction ◽  
Rainfall Depth ◽  
Standard Value ◽  
Tropical Watershed ◽  
Runoff Events

ABSTRACT The Curve Number (CN) method is extensively used for predict surface runoff from storm events. However, remain some uncertainties in the method, such as in the use of an initial abstraction (λ) standard value of 0.2 and on the choice of the most suitable CN values. Here, we compute λ and CN values using rainfall and runoff data to a rural basin located in Midwestern Brazil. We used 30 observed rainfall-runoff events with rainfall depth greater than 25 mm to derive associated CN values using five statistical methods. We noted λ values ranging from 0.005 to 0.455, with a median of 0.045, suggesting the use of λ = 0.05 instead of 0.2. We found a S0.2 to S0.05 conversion factor of 2.865. We also found negative values of Nash-Sutcliffe Efficiency (to the estimated and observed runoff). Therefore, our findings indicated that the CN method was not suitable to estimate runoff in the studied basin. This poor performance suggests that the runoff mechanisms in the studied area are dominated by subsurface stormflow.

scholarly journals Variability of the Initial Abstraction Ratio in an Urban and an Agroforested Catchment

Water ◽  
2020 ◽  
Vol 12 (2) ◽  
pp. 415 ◽  
Author(s):  
Adam Krajewski ◽  
Anna E. Sikorska-Senoner ◽  
Agnieszka Hejduk ◽  
Leszek Hejduk
Keyword(s):  
Land Use ◽  
Curve Number ◽  
Threshold Value ◽  
Storm Events ◽  
Direct Runoff ◽  
Initial Abstraction ◽  
Land Use Types ◽  
Rainfall Depth ◽  
Storm Rainfall ◽  
Service Curve

The Curve Number method is one of the most commonly applied methods to describe the relationship between the direct runoff and storm rainfall depth. Due to its popularity and simplicity, it has been studied extensively. Less attention has been given to the dimensionless initial abstraction ratio, which is crucial for an accurate direct runoff estimation with the Curve Number. This ratio is most often assumed to be equal to 0.20, which was originally proposed by the method’s developers. In this work, storm events recorded in the years 2009–2017 in two small Polish catchments of different land use types (urban and agroforested) were analyzed for variability in the initial abstraction ratio across events, seasons, and land use type. Our results showed that: (i) estimated initial abstraction ratios varied between storm events and seasons, and were most often lower than the original value of 0.20; (ii) for large events, the initial abstraction ratio in the catchment approaches a constant value after the rainfall depth exceeds a certain threshold value. Thus, when using the Soil Conservation Service-Curve Number (SCS-CN) method, the initial abstraction ratio should be locally verified, and the conditions for the application of the suggested value of 0.20 should be established.

scholarly journals Biophysical and sociocultural factors underlying spatial trade-offs of ecosystem services in semiarid watersheds

2015 ◽  
Vol 20 (3) ◽  
Author(s):  
Marina García-Llorente ◽  
Irene Iniesta-Arandia ◽  
Bárbara A. Willaarts ◽  
Paula A. Harrison ◽  
Pam Berry ◽  
...  
Keyword(s):  
Ecosystem Services ◽  
Sociocultural Factors ◽  
Trade Offs ◽  
Semiarid Watersheds

Effect of check dams on runoff, sediment yield, and retention on small semiarid watersheds

2014 ◽  
Vol 69 (5) ◽  
pp. 414-421 ◽  
Author(s):  
V. O. Polyakov ◽  
M. H. Nichols ◽  
M. P. McClaran ◽  
M. A. Nearing
Keyword(s):  
Sediment Yield ◽  
Check Dams ◽  
Runoff Sediment ◽  
Semiarid Watersheds

scholarly journals Spatial patterns of soil erosion and deposition in two small, semiarid watersheds

2005 ◽  
Vol 110 (F4) ◽  
pp. n/a-n/a ◽  
Author(s):  
M. A. Nearing ◽  
Akitsu Kimoto ◽  
Mary H. Nichols ◽  
Jerry C. Ritchie
Keyword(s):  
Soil Erosion ◽  
Spatial Patterns ◽  
Erosion And Deposition ◽  
Semiarid Watersheds

scholarly journals Long-term runoff and sediment yields from small semiarid watersheds in southern Arizona

2010 ◽  
Vol 46 (9) ◽  
Author(s):  
V. O. Polyakov ◽  
M. A. Nearing ◽  
M. H. Nichols ◽  
R. L. Scott ◽  
J. J. Stone ◽  
...  
Keyword(s):  
Sediment Yields ◽  
Semiarid Watersheds

Runoff Curve Number Method: Examination of the Initial Abstraction Ratio

2003 ◽  
Author(s):  
Donald E. Woodward ◽  
Richard H. Hawkins ◽  
Ruiyun Jiang ◽  
Allen T. Hjelmfelt, Jr. ◽  
Joseph A. Van Mullem ◽  
...  
Keyword(s):  
Curve Number ◽  
Initial Abstraction ◽  
Curve Number Method ◽  
Runoff Curve Number
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