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<br />. <br /> <br />stream--the resource description component, (3) the user of the criterion <br />component to measure and interpret the effect on recreation of the instream <br />flow characteristics described or predicted for a given stream--the evaluation <br />component, and (4) the practical question that needs to be answered--the <br />application component. <br />The principle challenge to the incremental methodology is in the <br />criterion component, where there are inadequacies with respect to (1) <br />substantive knpwledge about recreation, and (2) methods to formulate and apply <br />criteria. The principle problem is to develop ways to measure and interpret <br />the meaning of stream flow to recreation. There are five principle needs: <br />(1) the nature and structure of recreation, vis-a-vis instream flow needs to <br />be specified; (2) the need for a more rigorous definition of "recreation <br />potential"; (3) for each recreation "species" there is a need to identify <br />those parameters of or related to stream flow which are of significance; (4) <br />the need for a "criterion methodology", i. e., a framework or strategy for <br />constructing and applying criteria; and (5) the need to understand the <br />processes by which instream flow affects recreation potential. <br />In response to the need to establish a more rigorous conceptual framework <br />of relationships between recreation and instream flow, the workshop includes <br />as an appendix a paper authored by Dr. George Peterson, entitled, liThe <br />Relationship Between Recreation and Instream Flow". <br /> <br />.. <br /> <br />23 <br />