2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/96818The generation of an undular bore in the vicinity of a wave-breaking point is considered for the integrable Kaup-Boussinesq shallow water system. In the framework of the Whitham modulation theory, an analytic solution of the Gurevich-Pitaevskii type of problem for a generic "cubic" breaking regime is obtained using a generalized hodograph transform, and a further reduction to a linear Euler-Poisson equation. The motion of the undular bore edges is investigated in detail.14 pages, 4 figuresPattern Formation and SolitonsExactly Solvable and Integrable Systemstext