In late October 1998, a severe storm passed over central and southern Texas. Rainfall from that storm caused major flooding in the southern region of the Lower Colorado River watershed. Our client, the Lower Colorado River Authority (LCRA), asked us to evaluate what would have happened if the storm had passed instead to the north, over the Pedernales River watershed.
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To do so, we transposed the radar data from that storm, determining what the precipitation in the Pedernales watershed would be had the storm been centered at the intersection of Gillespie, Kimble, and Kern counties; computed the resulting watershed runoff; and routed the flows to find what the Lake Travis inflow from the Pendernales River would be.
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