Table S1. Annual flow summary from 1987-2005 of the Apalachicola River below Jim Woodruff Lock and Dam near Chattahoochee, Florida based on flow data collected at 15-minute intervals by U.S. Geological Survey gaging station 0235800. The proportion of observations > 1158 m^3/s (>Q10), between 682-1158 m^3/s (Qhigh), between 280-682 m^3/s (Qnormal), between 190-280 m^3/s (Qlow), and < 190 m^3/s (<Q90) are indicated for each year.

year	proportion_>Q10	proportion_Qhigh	proportion_Qnormal	proportion_Qlow	proportion_<Q90
1987	0.094553278	0.873966708	0.031480014	0	0
1988	0.175482549	0.053891704	0.64211695	0.125861185	0.002647612
1989	0	0.026033341	0.737382964	0.145752455	0.09083124
1990	0.097650565	0.35477164	0.229745651	0.088121145	0.229710999
1991	0.024194311	0.072267902	0.576410547	0.255772926	0.071354314
1992	0.004810977	0.030203826	0.636529264	0.210885903	0.11757003
1993	0.072628207	0.159566506	0.447085591	0.154656767	0.166062929
1994	0	0.005370664	0.455009685	0.405587838	0.134031813
1995	0.001664562	0.181293767	0.523791758	0.186631845	0.106618069
1996	0.008433354	0.201831965	0.545135818	0.143619709	0.100979154
1997	0.019284435	0.064767379	0.68749219	0.125203049	0.103252947
1998	0	0.144200724	0.464591777	0.072487084	0.318720416
1999	0.335626477	0.166990698	0.476923997	0.020458828	0
2000	0.53821457	0.176298443	0.261222866	0.024264121	0
2001	0.172984533	0.29534802	0.396883056	0.047486525	0.087297867
2002	0.304579277	0.276727155	0.375959531	0.033528426	0.009205612
2003	0	0.035296178	0.518611509	0.267451026	0.178641287
2004	0	0.204518984	0.609189378	0.144857908	0.041433729
2005	0	0.064078008	0.553427361	0.276510535	0.105984097