| Abstract: | The water level of the navigation pools on the Mississippi River are maintained by the operation of tainter and roller gates at the locks and dams. Discharge ratings for the gates on Lock and Dam 12, at Bellevue, Iowa, were developed from current-meter discharge measurements made in the forebays of the gate structures. Methodology is given to accurately compute the gate openings of the tainter gates. Discharge coefficients, in equations that express discharge as a function of tailwater head , forebay head, and height of gate opening, were determined for conditions of submerged-orifice and fee-weir flow. A comparison of the rating discharges to the hydraulic-model rating discharges is given for submerged orifice flow for the tainter and roller gates. (Author ‘s abstract) |
| Genre: | USGS Numbered Series |
| ProdID: | 27637 |
| Citation Author: | Heinitz, Albert J. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | viii, 43 p. :ill., map ;28 cm. |
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| Citation Publisher: | U.S. Geological Survey, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 86-4135 |
| Citation Search Results Text: | Discharge ratings for control gates at Mississippi River lock and dam 12, Bellevue, Iowa; 1986; WRI; 86-4135; Heinitz, Albert J. |
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| Citation Year: | 1986 |
| Type: | citation/reference |
| Text: | Discharge ratings for control gates at Mississippi River lock and dam 12, Bellevue, Iowa; 1986; WRI; 86-4135; Heinitz, Albert J. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1986/4135/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1986/4135/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey, |
