What she and her shipmates learn could improve predictions for how climate change will alter the Texas coast. The buried valley likely contains troves of a coveted resource that could help Texas prepare for the climate-driven storms and surges to come — sand. The cruise is sponsored by the Texas General Land Office, an agency that manages state lands and wants to find new stores of sand to reinforce beaches and dunes along the coast. Beach nourishment plays a central role in the Texas General Land Office’s coastal resiliency master plan, with several multi-million dollar projects in the pipeline. The idea that beach nourishment is a sustainable way to adapt to climate change, however, is contested.