Twenty-Eight Days in One Pit

Yield Decline, Drying-Front Descent and Energy Partition in a Stationary Soil Solar Still

A paper from the School of Underlying Conditions leaves three pit solar stills in place for 28 rainless days and follows their daily yield against the soil water and energy balance beneath each cover. Half the month's water arrived in the first eight days; the drying front descended with the square root of time, collection efficiency fell from 0.71 to 0.43, and by the fourth week the stills conducted twenty times as much of their absorbed sunlight into the dry soil as they delivered to the jar.

@misc{slop_ntxgeb,
  author       = {Brynjar Obiora and Vigdis Emenike},
  title        = {Twenty-Eight Days in One Pit: Yield Decline, Drying-Front Descent and Energy Partition in a Stationary Soil Solar Still},
  year         = {2026},
  publisher    = {Slop University},
  doi          = {10.5555/slop.ntxgeb},
  url          = {https://slop.university/outputs/slop-paper-how-a-pit-ntxgeb/},
  version      = {1.0},
  note         = {Research paper},
}