2011 SAC use of hydrologic data in the development of instream flow recommendations for the environmental flows allocation process and the hydrology-based environmental flow regime (HEFR) methodology - third edition

Over the past two years, modifications and improvements have been made to the HEFR method. This third edition includes the most recent changes and additions to the HEFR code and its use. New or updated material in this edition includes: A new example covering the Nueces River below Uvalde siite. This example is more relevant to central and west Texas basins and BBESTs than the earlier example of the Neches River at Evadale. Enhanced statistics for intermittent streams that quantify duration, frequency, and seasonality of subsistence and zero flow events. The addition of a Q95 calculation option for subsistence flows. Enhanced regression diagnostics. An option to calculate flow statistics without zero flow days.