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By Shlomo P. Neuman, Alberto Guadagnini, Monica Riva (auth.), Phoolendra K. Mishra, Kristopher L. Kuhlman (eds.)

ISBN-10: 1461464781

ISBN-13: 9781461464785

ISBN-10: 146146479X

ISBN-13: 9781461464792

​This publication represents forms of growth in hydrogeology, together with conceptualization alterations, various methods to simulating groundwater circulation and shipping new hydrogeophysical tools. each one bankruptcy extends or summarizes a up to date improvement in hydrogeology, with forward-looking statements concerning the demanding situations and strengths which are confronted. whereas the identify and scope is extensive, there are numerous sub-themes that attach the chapters. subject matters comprise theoretical advances in conceptualization and modeling of hydrogeologic difficulties. Conceptual advances are extra tempered by way of insights coming up from observations from either box and laboratory work.​

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21) is workable only if the products of the scaling factor and capillary pressure head, (α32 hC32 ) and (α21 hC21 ), satisfy the constraint in Eq. 23). This constraint seems to have little physical relevance. , not due to physical justifications. 23). ’s model, the relative permeability as a function of the degree of saturation is proposed by Parker et al. 28) where S1 is the effective degree of saturation for water, S1r is the irreducible saturation of water and St is the effective degree of saturation for total liquid.

1 The Relations of Saturation and Capillary Pressure Specifically, analogous to the van Genuchen’s model (van Genuchten 1980),the model proposed by Tsai and Yeh (2012) is given as follows: St,i ≡ Θi = St,i+1 1 for hCi+1,i ≤ 0 [1 + (αi+1,i hCi+1,i )n ]−m for hCi+1,i > 0, i = 1, 2, . . 29) where St,i is the total degree of saturation accumulated up to the i−th phase, St,i+1 is the total degree of saturation accumulated up to the (i + 1)−th phase, Θi is the ratio of the total accumulated degree of saturation of the relatively wetting phase (i−th phase) to that of the relatively non-wetting phase ((i + 1)−th phase), αi+1,i is the scaling factor between the (i + 1)−phase and i−phase and hCi+1,i ≡ hi+1 − hi is the capillary pressure head between the (i + 1)−phase and i−phase, [L].

465 × 1015g/cm/day2 . The boundary conditions at the top are the same as that in Example 1: the mass fluxes of water, NAPL, and air are n · M1 = −10g/cm2 /day, n · M2 = 0, and n · M3 = 0, respectively. The fluid and material properties are given in Fig. 4. 0 × 10−3day is reached. Plausible solutions are obtained with the present model. The solution for degrees of saturation in each phase is depicted in Fig. 5. It is seen that NAPL and air are displaced downward from the top of the soil column, while water infiltrates into the column, as expected.

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Advances in Hydrogeology by Shlomo P. Neuman, Alberto Guadagnini, Monica Riva (auth.), Phoolendra K. Mishra, Kristopher L. Kuhlman (eds.)

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