Abstract: A variable volume pneumatic enclosure is provided. The enclosure includes a combination of fixed and ballast anchors for allowing the enclosure to expand and contract in order that a complete hydrologic cycle may be closed. The enclosure also includes a collection system for collecting condensed water vapor within the enclosure and a distribution system for redistributing the collected water.

Abstract: An air supported structure includes a wall portion formed from a plurality of elongated panel members joined together by seams. Webs are interconnected along the seams to relieve stress. A plurality of header cables carry the loads placed on the structure. The header cables extend between corner support assemblies and a funicular cable assembly. The funicular cable assembly extends in an arcuate path around an apex of the structure. More specifically, the funicular cable assembly includes first and second independent strands. The webs passing through the apex of the structure are alternatively connected to these two cable strands. These same webs extend between and are connected to a ground anchoring structure at one end and a crown harness at the other that extends along the apex. The funicular cable assembly advantageously serves to balance the loads placed on the header cables by, for example, changes in wind speed and direction, so as to significantly enhance the stability of the structure.