Title: IMPORTANCE OF INLET DESIGN ON CULVERT CAPACITY, WITH DISCUSSION AND CLOSURE
Abstract: THE DESIGN OF A CULVERT INLET HAS SIGNIFICANT BEARING UPON THE RELATIONSHIP OF THE HEAD TO THE DISCHARGE OF A CULVERT. ITS RELATIVE IMPORTANCE IS CONTINGENT UPON THE TYPE OF FLOW OCCURRING IN THE CULVERT, WHICH IN TURN IS GOVERNED BY THE LOCATION OF THE CONTROL SECTION. THE HEAD-DISCHARGE CURVES OF CULVERTS HAVING SQUARE-EDGED INLETS HAVE BEEN COMPARED WITH THOSE FOR CULVERTS HAVING ROUNDED INLETS TO ILLUSTRATE THE CONDITIONS FOR WHICH A HEAD-ADVANTAGE MAY BE OBTAINED BY USING A ROUNDED INLET. THESE COMPARISONS HAVE BEEN MADE FOR THREE CATEGORIES OF CULVERT FLOW: LONG CULVERTS ON STEEP SLOPES, LONG CULVERTS ON MILD SLOPES, AND SHORT CULVERTS. DIMENSIONLESS HEAD-DISCHARGE CURVES HAVE BEEN PLOTTED FOR CULVERT FLOW IN EACH CATEGORY. FOR CULVERTS ON STEEP SLOPES, EXPERIMENTAL DATA HAVE BEEN COMPARED WITH THE COMPUTED VALUES AND, SINCE THE AGREEMENT WAS REASONABLY GOOD, SERVE AS A BASIS FOR THE ANALYSIS OF FLOW IN CULVERTS OPERATING UNDER CONDITIONS OTHER THAN THOSE FOR WHICH THE TESTS WERE MADE. THE GREATEST HEAD ADVANTAGE FOR A PARTICULAR DISCHARGE OF THE ROUNDED INLET OVER THAT OF A SQUARE-EDGED INLET WAS FOUND FOR THOSE CASES IN WHICH THE CONTROL SECTION WAS LOCATED AT THE INLET. THESE WERE LONG CULVERTS ON STEEP SLOPES OR SHORT CULVERTS WHERE THE LENGTH WAS NEGLIGIBLE AS REGARDS BARREL FRICTIONAL RESISTANCE TO FLOW. FOR LONG CULVERTS ON MILD SLOPES, THE HEAD-ADVANTAGE WAS FAR LESS PRONOUNCED. /AUTHOR/
Publication Year: 1953
Publication Date: 1953-01-01
Language: en
Type: article
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Cited By Count: 1
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