Draft - Risk of Alteration of Magnitude of Extreme Low and Base Flows

Note:  The contents of this map are still under development and are being made available for illustration purposes only.  These data are not to be used without permission by the map author.Risk of altered ecologically significant components of the flow regime due to human impacts.  The SARP Flow Alteration Assessment provides a regional characterization of the distribution and risk of altered flow regimes at the NHD+ segment scale. The human impacts include runoff from impervious surfaces, evaporative losses from artificial water bodies, and surface water use.  Impacts of these activities on selected ecologically significant components of the flow regime are given in the attached document.  These flow components are based on the GCP LCC flow-ecology hypotheses.

This map illustrates the risk of impacts to the magnitude of extreme low and base flows.  The risk is based on the largest  individual human sources of risk of flow alteration calculated for the NHD+ segment whole watershed.  See the individual maps in the SARP gallery of risks of flow alteration for more information. 

For more information about the risk of flow alteration assessment, the GCP LCC flow-ecology hypotheses and how this map was developed for the Southern Instream Flow Network (SIFN), go to http://www.southeastaquatics.net/sarps-programs/sifn/instream-flow-resources. 

Your comments about this map and the databases are welcome.  Please send comments to the map author using the Comment tab below.