These materials will enable precise, stimulus-responsive control of water-solid interactions, improving water vapor and solute ion sorption, and enhancing capillarity-driven liquid transport. The envisioned applications include tunable permeability and imbibition/evaporation for water transpiration powered hydraulic systems, switchable capillary pumps, intelligent water purification, and energy-efficient desalination. This research will pioneer advanced fluid transport material systems for sustainable water management and resource extraction, focusing on the multiscale control of water interactions and the emerging field of transport metamaterials.