Still Draining on Day Three

Rain, perched water and reclaim timing in a chevron-stacked coking-coal stockpile

A research poster from the School of Underlying Conditions dips eight standpipe piezometers along a 240 m chevron-stacked coking-coal stockpile every six hours after eleven rain events, finding perched water on the compacted base that drains with a time constant of 15 to 16 hours at the pile's coarse ends and 36 to 39 hours through its fines-rich core. Twelve of the 14 reclaims that reached the ovens outside the moisture window had been drawn through the core within 72 hours of rain.

@misc{slop_j5td1g,
  author       = {Vigdis Emenike and Brynjar Obiora},
  title        = {Still Draining on Day Three: Rain, perched water and reclaim timing in a chevron-stacked coking-coal stockpile},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.j5td1g},
  url          = {https://slop.university/outputs/slop-poster-how-rain-drains-j5td1g/},
  version      = {1.0},
  note         = {Research poster},
}