ניהול

קהילה:

אסיף מאגר המחקר החקלאי

Predicting interrill erodibility factor from measured infiltration rate

Year:

1997

Source of publication :

Water Resources ResearchAuthors :

בן-חור, מני

;

.

Volume :

33

Co-Authors:

Ben-Hur, M., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel, Agricultural Research Organization, Volcani Center, POB 6, Bet Dagan 50250, Israel

Agassi, M., Soil Erosion Research Station, Ruppin Institute, Emeq Hefer, Israel, Soil Erosion Research Station, Ruppin Institute, Emeq Hefer 60960, Israel

Agassi, M., Soil Erosion Research Station, Ruppin Institute, Emeq Hefer, Israel, Soil Erosion Research Station, Ruppin Institute, Emeq Hefer 60960, Israel

Facilitators :

From page:

2409

To page:

2415

(

Total pages:

7

)

Abstract:

Direct measurement of an interrill erodibility factor (K(i)) is costly and time intensive. As K(i) and the final infiltration rate (FIR) under seal formation are both affected by aggregate breakdown at the soil surface, it was hypothesized that the K(i) and FIR values are correlative. FIR and soil-loss values of 53 soils, measured in several different laboratory rainfall simulators, were investigated. The slope factor (S(f)) of smectitic soils was higher than that of nonsmectitic soils at slope angle (θ) > 9%. The equation S(f) = exp (-0.68 + 8.28 sin θ) defines significantly (r2 = 0.94) the S(f) for smectitic soil. For the various soils the FIR and K(i) values were correlative and fitted significantly the K(i) = a - b In(FIR) model; a and b are empirical coefficients. This model was found applicable for a wide range of rain intensities (34-68 mm h-1). However, an increase of the raindrop kinetic energy from <11.6 to 22.3 J mm-1 m-1 increased the absolute values of the coefficients, a and b. The FIR-K(i) model differed for smectitic and nonsmectitic soils; at a given FIR, the smectitic soils had a higher K(i) value than the nonsmectitic soils.

Note:

Related Files :

erodibility

Erosion

Infiltration

Infiltration rate

Interrill erosion

rainfall intensity

slope angle

soil

עוד תגיות

תוכן קשור

More details

DOI :

Article number:

Affiliations:

Database:

סקופוס

Publication Type:

מאמר

;

.

Language:

אנגלית

Editors' remarks:

ID:

23501

Last updated date:

02/03/2022 17:27

Creation date:

17/04/2018 00:00

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Scientific Publication

Predicting interrill erodibility factor from measured infiltration rate

33

Ben-Hur, M., Agricultural Research Organization, Volcani Center, Bet Dagan, Israel, Agricultural Research Organization, Volcani Center, POB 6, Bet Dagan 50250, Israel

Agassi, M., Soil Erosion Research Station, Ruppin Institute, Emeq Hefer, Israel, Soil Erosion Research Station, Ruppin Institute, Emeq Hefer 60960, Israel

Agassi, M., Soil Erosion Research Station, Ruppin Institute, Emeq Hefer, Israel, Soil Erosion Research Station, Ruppin Institute, Emeq Hefer 60960, Israel

Predicting interrill erodibility factor from measured infiltration rate

Direct measurement of an interrill erodibility factor (K(i)) is costly and time intensive. As K(i) and the final infiltration rate (FIR) under seal formation are both affected by aggregate breakdown at the soil surface, it was hypothesized that the K(i) and FIR values are correlative. FIR and soil-loss values of 53 soils, measured in several different laboratory rainfall simulators, were investigated. The slope factor (S(f)) of smectitic soils was higher than that of nonsmectitic soils at slope angle (θ) > 9%. The equation S(f) = exp (-0.68 + 8.28 sin θ) defines significantly (r2 = 0.94) the S(f) for smectitic soil. For the various soils the FIR and K(i) values were correlative and fitted significantly the K(i) = a - b In(FIR) model; a and b are empirical coefficients. This model was found applicable for a wide range of rain intensities (34-68 mm h-1). However, an increase of the raindrop kinetic energy from <11.6 to 22.3 J mm-1 m-1 increased the absolute values of the coefficients, a and b. The FIR-K(i) model differed for smectitic and nonsmectitic soils; at a given FIR, the smectitic soils had a higher K(i) value than the nonsmectitic soils.

Scientific Publication

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