Climate adaptation
A soil hydrogel is not a water source but an osmotic engine moving moisture in time; salt and degradation eat the gradient.
Explanatory reference: why a technology works and where the science is unsettled. Drafted with AI assistance; pages carry no per-claim references and have not yet been reviewed by a subject expert — use them for orientation, not as a citable source. The evidence for each technology, with graded sources, is in its dossier. How this reference is made →
A one-page cluster, and its thesis fits in a sentence: a superabsorbent hydrogel does not create water, it moves water in time — from irrigation or the rare rain to the dry interval. The engine is osmotic: a crosslinked hydrophilic network draws water along a chemical-potential gradient. Both of the cluster’s boundaries are the same physics: dissolved salt erases the gradient (worst under saline irrigation, exactly where it is needed), and the choice between durability and degradability is one beam with two ends.
Start with ecological hydrogels for arid soils.
Articles 1
| Ecological hydrogels for arid soils A soil hydrogel is a time machine for water, not a source of it: a cross-linked polymer network swells osmotically, holds water through the dry interval, and surrenders it — provided soil salinity does not collapse the gradient and biodegradation does not end the service life. |