Heap Leach Liner Leak: Hydraulic Head & Seepage (2D)

This 2D companion trades the 3D scene's rotating tank for a plain cross-section built on a real mass-balance: irrigation percolates through the ore heap, the underdrain carries away what it can as pregnant leach solution, and whatever it cannot carry accumulates as hydraulic head sitting directly on the liner — head that then drives a Darcy-law leak whose size depends on both that head and how damaged the liner is, so pushing irrigation past the underdrain's capacity on a compromised liner visibly turns a secure pad into a breach.