Linked cavity drainage system
= Linked cavity drainage system
{title2=$N=N_K(Q),\quad N_K'(Q)<0$}
Sliding opens <water>-filled cavities behind bed obstacles and <ice> creep closes them; narrow connections allow drainage between cavities. In a decreasing effective-<pressure>/discharge relation, a route carrying extra flux needs higher <fluid pressure>[water pressure]. That <pressure> diverts <water> to neighboring routes, favoring a distributed network instead of <concentration> into one channel.