1. Do We Have Enough ?
USGS can’t answer that question …. but can provide data and science tools/analyses to help society answer this question.
USGS provides third party, non-regulatory, peer-reviewed, transparent, archived, publically-accessible science
Data collection is collected using Nationally standardized methods
USGS science responds directly to societal needs through our partnership business model

3. Florida USGS HYDROLOGIC DATA PROGRAM
450 CONTINUOUS DISCHARGE SITES
405 CONTINUOUS GROUNDWATER
1100 PERIODIC sampling sites
145 WATER-QUALITY MONITORS
5 EVAPOTRANSPIRATION

4. Do We Have Enough ?
“Enough” is subjective and relative to impact tolerated:
Enough for whom …. public (consumption), public (irrigation), public (recreation), industry, agriculture, ecosystems,
Zero sum game – withdrawals come from somewhere:
spring flows, flows to sea, evapotranspiration and storage (e.g., lakes, wetlands)
Subject to constraints:
volume of freshwater and salinization (threat offshore or below)
those set by us – Minimum Flows and Levels (threat to surface environment)
Moving target – changing population and land use; specter of climate change