The Sheet Pile Module

The Sheet Piling module is an add-on module for the PCG groundwater (SZ) solver in MIKE SHE that allows you to reduce the conductance between cells in both the horizontal and vertical directions. Vertical sheet piling reduces the horizontal flow between adjacent cells in the x- or y-direction. It is defined by a surface with a specified leakage coefficient located between two MIKE SHE grid cells in a specified computational layer. If the Sheet Piling module is active, then the horizontal conductance, C_h, for flow between two cells is cal­culated as

(30.28)   

where k_i    is the hydraulic conductivity of the cells on either side of the sheet pile [L/T], k_leak   is the leakage coefficient of the sheet pile between the cells[1/L], dz_i   saturated layer thickness [L], and dz*   maximium of dz1 and dz2 [L]

Similarly, reducing the vertical conductance between two layers can simulate a restriction in vertical flow (e.g. thin clay layer or liner). Thus, if the Sheet Pil­ing module is active for vertical flow, the vertical conductance between two layers is calculated as

(30.29)   

where k_i    is the hydraulic conductivity of the cells above and below the sheet pile [L/T], k_leak    is the leakage coefficient [1/T], and dz_i   is the layer thickness [L].