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<br />storage and release subroutines were somewhat improved and a river channel <br />storage and flow subroutine added, there is reason to believe that it could <br />be used not only to plan reservoir systems but to manage the flow regimes <br />of those systems after they were constructed. The model when completed will <br />be a very practical engineering tool. We feel that the continued development <br />of the model should have high priority in the Corps of Engineers. Of course, <br />considerable development and validation will have to be done before the model <br />can be used with confidence on routine engineering problems. <br /> <br />Summary <br /> <br />48. Rational judgments concerning the degree of optimization that can <br />be allowed for one land use at the expense of others can be made only if <br />I procedures are available predicting the effectiveness of the land use in <br />complex environmental systems. The systems analysis procedures involve <br />three major steps: (a) development of performance prediction models, <br />(b) acquisition of environmental inputs to the performance prediction <br />models, and (c) display of the performance over the area of interest. The <br />WES in the course of performing regional studies in relation to military <br />activities, i.e. land locomotion, battlefield surveillance, construction <br />,of roads, and others has developed procedures that are accurate and practical. <br />iDetails of a military and civil project (European Waterways Study and the <br />iRowlesburg Lake Model System) are presented to illustrate Steps I and 2 of <br />,the three-step concept. The procedures have applicability in a wide range <br />'of civil works and it seems prudent to transfer experience gained in mili- <br />,tary research and development to the civil sphere. <br /> <br />25 <br />