What long-term strategy has the San Diego Association of Governments (as well as communities in North Carolina) adopted to deal with depleted sand on our beaches? What long-term strategy has the San Diego Association of Governments (as well as communities in North Carolina) adopted to deal with depleted sand on our beaches? periodically dredging sand from offshore areas and pumping it onto the beaches tearing down dams that have trapped sand upstream, and letting rivers deliver the sand naturally design and install low-relief breakwater systems to calm waves and retain sand bring sand from other areas by barge or train, such as from Australia and Arizona