Derivation of Soil Moisture Recovery Relation Using Soil Conservation Service (SCS) Curve Number Method

Kim, J.; Johnson, L. E.; Cifelli, R.; Choi, J.; Chandrasekar, V.

doi:10.3390/w10070833

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Derivation of Soil Moisture Recovery Relation Using Soil Conservation Service (SCS) Curve Number Method

2018

By Kim, J. ; Johnson, L. E. ; Cifelli, R. ; ...

Source: Water, 10(7), 21.

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Personal Author:

Kim, J. ; Johnson, L. E. ; Cifelli, R. ; Choi, J. ; Chandrasekar, V. ;

NOAA Program & Office:

OAR (Oceanic and Atmospheric Research) ; PSL (Physical Sciences Laboratory) ; ESRL (Earth System Research Laboratory) ; CIRA (Cooperative Institute for Research in the Atmosphere) ;

Description:

Soil moisture retention (SMR) capacity plays a key role in estimating the direct runoff when a multi-pulse storm event occurs. It is very important to know how much SMR will be recovered during the intervals of no rain of a multi-pulse storm. This study developed a new approach for derivation of the SMR recovery curve (R-curve) at sub-daily time-scales using the Curve Number (CN) method. The methodology was applied using complex storm events in the Napa River basin, California. The R-curve is classified into three sections depending on the recovery rate of SMR during the inter-storm interval of no rain (INR), and this study defines the characteristics. The first section of the R-curve (INR 0-21 h with 0.97 mm/h) is described as gradually recovering SMR, since water is being infiltrated and the upper soil layer is not fully saturated. The second section (INR 21-36 h with 2.11 mm/h) is defined as steeply recovering S due to downward drainage (sub-surface/inter flows) and evaporation without infiltration. The third section (INR 36-68 h with 0.34 mm/h) is described as gradually decreasing recovery dependent on evaporation since percolation and drainage have almost stopped.

Source:

Water, 10(7), 21.

DOI:

http://dx.doi.org/10.3390/w10070833

Document Type:

Journal Article ;

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CC BY

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