Marun Dam matters in the Hormuz Graph as a water and hydropower asset tied to eastern Khuzestan’s Marun-Jarahi basin, where agriculture, urban water demand, electricity generation, and downstream environmental stress overlap. Its role is distinct from Karun and Karkheh dams because it directly affects the Behbahan-side agricultural economy and water conditions in eastern and southeastern Khuzestan. The asset connects river regulation, irrigation exposure, food-production resilience, public utility pressure, hydropower context, and industrial operating risk in a province where water scarcity can quickly become an economic constraint.