Soil water balance correction due to light rainfall, dew and fog in Ebro river basin (Spain)

Abstract. The present paper introduces an analytical approach for the description of the soil water balance and runoff production within a schematic river basin. The model is based on a stochastic differential equation where the rainfall is interpreted as an additive noise in the soil water balance and is assumed uniform over the basin, the basin heterogeneity is characterized by a parabolic distribution of the soil water storage capacity and the runoff production occurs for saturation excess. The model allowed to derive the probability density function of the produced surface runoff highlighting the role played by climate and physical characteristics of a basin on runoff dynamics. Finally, the model have been tested over a humid basin of Southern Italy proposing also a strategy for the parameters estimation.

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Modeling Regional Soil Water Balance in Farmland of the Middle Reaches of Heihe River Basin

Water ◽

10.3390/w9110847 ◽

2017 ◽

Vol 9 (11) ◽

pp. 847 ◽

Cited By ~ 3

Author(s):

Jiang Li ◽

Xiaomin Mao ◽

Songhao Shang ◽

Tammo Steenhuis

Keyword(s):

Water Balance ◽

Soil Water ◽

River Basin ◽

Heihe River Basin ◽

Soil Water Balance ◽

Heihe River

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A stochastic approach for the description of the water balance dynamics in a river basin

Hydrology and Earth System Sciences Discussions ◽

10.5194/hessd-5-723-2008 ◽

2008 ◽

Vol 5 (2) ◽

pp. 723-748 ◽

Cited By ~ 2

Author(s):

S. Manfreda ◽

M. Fiorentino

Keyword(s):

Soil Moisture ◽

Water Balance ◽

Soil Water ◽

River Basin ◽

Stochastic Approach ◽

Soil Water Balance ◽

Water Storage Capacity ◽

Spatial Redistribution ◽

Homogeneous Soil ◽

Balance Dynamics

Abstract. The present paper introduces an analytical approach for the description of the soil water balance dynamics over a schematic river basin. The model is based on a stochastic differential equation where the rainfall forcing is interpreted as an additive noise in the soil water balance. This equation can be solved assuming known the spatial distribution of the soil moisture over the basin transforming the two dimensional problem in a one dimensional one. This assumption is particularly true in the case of humid and semihumid environments, where spatial redistribution of soil moisture becomes dominant producing a well defined pattern. The model allowed to derive the probability density function of the saturated portion of a basin and of its relative saturation. This theory is based on the assumption that the water storage capacity varies across the basin following a parabolic distribution and the basin has homogeneous soil texture and vegetation cover. The methodology outlined the role played by the basin shape in the soil water balance dynamics.

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