ࡱ> egd%` Fbjbj"x"x .$@@F  $ k(  {k}k}k}k}k}k}k$$mhokk kkk k;;;k:  {k;k{k;;; 6Hq F;gkk0k;Lp:Lp;Lp;,X ;e kk% kkkkkD  Innovations to Support Instream Flow Determinations in Texas, USA I: Hydroecological Integrity Process Presenter: Wendy Gordon, Texas Commission on Environmental Quality Abstract The U. S. Geological Survey has developed a series of tools that can actively support the determination of instream flow needs by providing a better understanding of the hydrologic regimes of rivers in a given area. This Hydroecological Integrity Assessment Process or HIP software comprises several parts that have been successfully tailored to meet the needs of individual states. Under contract, USGS has customized HIP using Texas-specific flow data from USGS gauging stations. The process resulted in four stream types (perennial stable, perennial flashy, intermittent stable, and intermittent flashy) and identified 10 primary flow indices that best describe each of those stream types. Using the Stream Classification Tool (SCT), future end users will be able to analyze gauge data from any gauge in the state and determine the stream type. Further analysis of hydrologic behavior at any given gauge location can be conducted using the Hydrologic Assessment Tool (HAT). Person Completing this Form Wendy Gordon, Ph.D., Texas Parks and Wildlife Department Todays Date 04/17/2008 Project Date and Duration 11/1/2006 to 8/31/2007 Project Collaborators James Henriksen, Ph.D., formerly of the USGS Fort Collins Science Center in CO Project Location Texas, USA Study Area (km2) 695,621 Aim/Purpose see abstract Objectives see abstract Specific Activities and Methods USGS performed multivariate analysis of relatively unaltered streamflow gauge records to identify a small set of stream types. Data Used USGS daily streamflow data from Texas Data Generated Classification scheme based on hydrologic data; a listing of relatively unaltered streamflow gauges with periods of record Results/Outcomes Stream Classification Tool (SCT); software for examining hydrologic behavior Hydrological Assessment Tool (HAT) Products Software not currently on USGS ftp site; manuals Management and Policy Application Texas is too large a state to conduct detailed instream flow studies for all rivers and streams. Thus, developing classification schemes is one way to generalize or leverage the information we do have about instream flow needs across stream types or classes. This project was one of two undertaken to aid in that generalization process. Ideally, relationships between aquatic biota and hydrology and other physical parameters would be developed in order to fully operationalize the classification schemes for instream-flow protection. Monitoring None Funding $65,000 USD plus some in kind from USGS Funding Source US EPA Clean Water Act Section 106 pass-through dollars to agency Documents: Henriksen, Jim, 2008, Hydrologic Assessment Tool Training [manual for] Texas Commission for Environmental Quality. Unpublished report. To obtain a copy, contact Wendy Gordon. For information about HIP:  HYPERLINK "http://www.fort.usgs.gov/Resources/Research_Briefs/HIP.asp" http://www.fort.usgs.gov/Resources/Research_Briefs/HIP.asp =CDHik[ ]  - . C D L O T \ q ~ {{wshR0hDhR0h_T5hRhR0hD5hnvhR0B* phhnv hS5hR0hR05 h,5hx;hSh  hX5h<}h<}5hR0hP 5h6h 6 h 6h h 5>* h 5>*h6h 5>* h_T5>*+CDjk . 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