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M. Banerjee 《Transport in Porous Media》2008,73(3):333-347
The field measurements and numerical results for intermittent flow regime in a sandy soil show that the time distributions
of the soil water flux q(z, t), and the soil water content θ(z, t)at various depths are periodic in nature, where t is time and z is the depth (i.e., at the surface z = 0 and at depths z = − 5, − 10, − 15 cm, etc). The period of q(z, t) and θ(z, t) variations are generally determined by the sum of the duration of pulse and the duration between the initiation of two consecutive
pulses of water at the soil surface. Fourier series models have been given for q(z, t) and θ(z, t) variations. The predicted Fourier results for these variations have been compared with the experimentally verified numerical
results—designated as observed values. The results show that the amplitudes of these variations were damped exponentially with depth, and the phase shift
increased linearly with depth. 相似文献
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