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data which can be gathered only at great cost and effort. In short, the procedure needs to be as simple and cheap as possible while still providing i,nformation of necessary quality. Needless to say, this is a big order as many of you here in this room know. I might draw an analogy between the task you are involved in and the similar task of mapping floodplains for purposes of floodplain manage- ment. As many of you know, a floodplain management program generally requires the aerial extent of the area inundated by the 100 year flood to be estimated since in most cases actual stage readings for the 100 year flood will at best be available at only a few locations on a stream. During my experience in the State of Illinois as head of the State water resources agency, I had a great deal of experience with floodplain management and quickly learned the need for solid and dependable floodplain mapping. I believe that a similar requirement exists here for solid and dependable information concerning the relation between various streamflow conditions for a specific stream and the suitability of wildlife habitat. Because this is a workshop on instream flow criteria and modeling, most of you here tonight are primarily concerned about quantifying the relation- ship between streamflows and wildlife habitat. However, someone must also worry about the rest of the requirements necessary to insure that adequate minimum flows will be preserved. Here we are talking about improving systems for water resources planning as well as changes in State and Federal laws. Taking the last of these first -- the State water laws -- I think that this is clearly a State problem in which the Federal government should not intervene. Last year in the course of the water resources policy review, the President, as well as Secretary of the Interior Andrus and Vice President ~ ... .. 8