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This work presents a conceptual systems architecture for integrating fusion-derived heat, water sanitation, mineral and isotope recovery, food production, logistics, materials processing, and infrastructure governance into a single regenerative civil framework. Rather than treating energy, water, sanitation, agriculture, industry, and finance as isolated sectors, the paper models them as interdependent thermodynamic and institutional cycles designed to retain public value and ecological continuity.

The framework redefines sanitation as a productive thermodynamic process, using waste heat as the primary driver for purification, resource recovery, and material transformation. Water is treated as a heat carrier, solvent, and logistical medium; canal-based infrastructure functions simultaneously as transport corridors, thermal buffers, gravity-based energy storage, and industrial distribution systems. Environmental pressures such as heat accumulation and sea-level rise are incorporated as managed inputs rather than external risks.

The contribution is theoretical and systems-oriented, drawing on industrial ecology, circular economy governance, complex adaptive systems, and infrastructure assurance literature. Fusion is treated as a future-available high-grade heat source rather than a near-term engineering specification. The paper is intended to inform policy, infrastructure design, and interdisciplinary research on circular industrial civilization, resilient public infrastructure, and integrated water–energy–food systems.