RAINFALL INDUCED SOIL SEAL .C. A DYNAMIC-MODEL WITH KINETIC-ENERGY INSTEAD OF CUMULATIVE RAINFALL AS INDEPENDENT VARIABLE

被引：16

作者：

MUALEM, Y

ASSOULINE, S

ROHDENBURG, H

机构：

[1] The Hebrew Univ., Jerusalem Faculty, Agriculture Dept. of Soil and Water Sciences Rehovot

来源：

CATENA | 1990年 / 17卷 / 03期

关键词：

D O I：

10.1016/0341-8162(90)90022-6

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

This study presents a dynamic model of soil sealing, based on the extension of a previous model that considers the seal as a non-uniform layer, and the rainfall kinetic energy as the rain property dominating the sealing process. The model was applied in the case of two soils, sandy loam and loam, under saturated conditions, using an inverse procedure for its calibration. The validity of the theoretical model was examined for each soil by comparison to results of an infiltration test carried out under rainfall and flow boundary conditions different from those related to the data used for the model calibration. A very good agreement was found between the observed and the predicted infiltration curves in the case of sandy loam, but not as good in the case of loam soil. The error that may stem from using the cumulative rainfall instead of the rainfall kinetic energy, as the independent variable of the soil sealing model, was analyzed under various conditions. In cases where the rainfall kinetic energy per unit mass is a constant, independent of the rainfall intensity, the use of the cumulative rainfall is equivalent to the use of the rainfall kinetic energy. However, rainfall events often include long rainfall of low intensity and short time intervals of high rainfall intensity, with the kinetic energy per unit mass varying considerably during a single rainfall event. In such a case, the use of the cumulative rainfall as the model variable may lead to a considerable error. Applying the calibrated model for the sandy loam and characteristics of simulated and natural rainfall, the error associated with the use of the cumulative rainfall was found to lead to a large error in calculation of the infiltration rate during the sealing process. © 1990.

引用

页码：289 / 303

页数：15

共 28 条

[1] Ahuja, Ross, A new Green and Ampt type model for infiltration through a surface seal permitting transient parameters below the seal, Proc. of the Nat. Conf. on Advances in Infiltration, (1983)
[2] Assouline, Mualem, The similarity of regional rainfall: A dimensionless model of drop size distribution, Trans. ASAE, 32, 4, pp. 1216-1222, (1989)
[3] Baumhardt, The effect of rainstorm characteristics on soil sealing and infiltration, Ph.D. thesis, (1985)
[4] Ben-Asher, Warrick, Effect of variations in soil properties and precipitation on microcatchment water balances, Agric. Water Management, 12, pp. 177-194, (1987)
[5] Benyamini, The behavior of bare soils under rainfall application, Ph.D. Thesis, (1981)
[6] Brakensiek, Rawls, Agricultural management effects on water processes — Part II. Green and Ampt parameters for crusting soils, Trans. of ASAE, 26, pp. 1753-1757, (1983)
[7] Chu, Modeling infiltration and tilled soil during non-uniform rain, Trans. of ASAE, 28, pp. 1226-1229, (1985)
[8] Chu, Modeling infiltration and tilled soil during non-uniform rain, Trans. of ASAE, 28, (1985)
[9] Eigel, Moore, Effect of rainfall energy on infiltration into bare soil, Proc. of the Nat. Conf. on Advances in Infiltration, (1983)
[10] Farrell, Larson, DYNAMICS OF THE SOIL-WATER SYSTEM DURING A RAINSTORM, Soil Science, 113, pp. 88-95, (1972)

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