Analysis of the low-flow characteristics of streams in Louisiana
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Abstract
The U.S. Geological Survey, in cooperation with the Louisiana Department of Transportation and Development, Office of Public Works, used geologic maps, soils maps, precipitation data, and low-flow data to define four hydrographic regions in Louisiana having distinct low-flow characteristics. Equations were derived, using regression analyses, to estimate the 7Q2, 7Q10, and 7Q20 flow rates for basically unaltered stream basins smaller than 525 square miles. Independent variables in the equations include drainage area (square miles), mean annual precipitation index (inches), and main channel slope (feet per mile). Average standard errors of regression ranged from +44 to +61 percent. Graphs are given for estimating the 7Q2, 7Q10, and 7Q20 for stream basins for which the drainage area of the most downstream data-collection site is larger than 525 square miles. Detailed examples are given in this report for the use of the equations and graphs.
| Publication type | Report |
|---|---|
| Publication Subtype | State or Local Government Series |
| Title | Analysis of the low-flow characteristics of streams in Louisiana |
| Series title | Water Resources Technical Report of the Louisiana Department of Transportation and Development, Office of Public Works |
| Series number | 35 |
| Year Published | 1985 |
| Language | English |
| Publisher | Louisiana Department of Transportation and Development, Office of Public Works |
| Publisher location | Baton Rouge, LA |
| Contributing office(s) | Louisiana Water Science Center |
| Description | vi, 41 p. |
| Country | United States |
| State | Louisiana |
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