Open-File Report 03—473
U.S. Geological Survey Open-File Report 03—473, 109 pages (Published March 2004)
Curtis L. Sanders, Jr. and Toby D. Feaster
This report is available online in pdf format (3 MB): USGS OFR 03-473.pdf
As part of its mission to collect, analyze, and store streamflow data, the U.S. Geological Survey computes flow through several dam structures throughout the country. Flows are computed using hydraulic equations that describe flow through sluice and Tainter gates, crest gates, lock gates, spillways, locks, pumps, and siphons, which are calibrated using flow measurements. The program DAMFLO.2 was written to compute, tabulate, and plot flow through dam structures using data that describe the physical properties of dams and various hydraulic parameters and ratings that use time-varying data, such as lake elevations or gate openings. The program uses electronic computer files of time-varying data, such as lake elevation or gate openings, retrieved from the U.S. Geological Survey Automated Data Processing System. Computed time-varying flow data from DAMFLO.2 are output in flat files, which can be entered into the Automated Data Processing System database. All computations are made in units of feet and seconds. DAMFLO.2 uses the procedures and language developed by the SAS Institute Inc.
The installation shell script damflo_install.sh is available for downloading over the Internet from the public anonymous File Transfer Protocol (FTP) server sun1dsccmb.er.usgs.gov (internet address 126.96.36.199) in the directory pub/damflo. When the system administrator executes the installation script file damflo_install.sh with root access from any directory on the SUN Microsystems (Solaris 8) computer, it will transfer, install, and create the necessary programs, directories, and links. The DAMFLO.2 programs are stored in the directory /usr/opt/wrdapp/locapp/damflo by the damflo_install.sh script program. DAMFLO.2 utilizes the SAS software package marketed by the SAS institute, Inc. (1993). Therefore, one copy of the SAS software also needs to be installed on the SUN computer.
Several steps are required prior to executing the DAMFLO.2 program. A working directory should be created for the station where the dam computations are being made. In the station directory, all time-varying data required for computations at the dam of interest must be retrieved and stored sequentially in a single file. The static input data defining the hydraulic parameters for the outlets must be entered into the SAS database by typing damflo and using the appropriate options (4-14) from the damflo menu. Using a text editor, a run.primary file with the specific calls needed for the flow computations at the dam of interest must be created and stored in the working directory. After completing these tasks, the program is executed by typing damflo and choosing option 1, 2, or 3 from the screen menu below.
PROGRAM DAMFLO - VERSION OF SEPT 23, 2002 RUN PRIMARIES:
1. Plot and table to the terminal screen.
2. Plot and table to the printer.
3. Only print uv and dv primary files and produce uv and dv card image files.
EDIT DAMFLO STATIC DATA SETS:
4. Control 10. Locks
5. Interpolation 11. Lockgates
6. Ratings 12. Crest gates
7. Stage 13. Pumps
8. Tainter gates 14. Siphons
15. Plot hydraulic ratings
Select one of options 1-15:
Figure 2. Example of the damflo menu.
Purpose and Scope
General Description of Program DAMFLO.2
Time-Varying Input Data
Static Input Data
Static Stage Data Limits
Static Hydraulic Rating Data
Static Physical and Hydraulic Parameter Data
Leakage for Free- and Submerged-Weir Flow Conditions
Differentiation Between Free- and Submerged-Weir Flow Conditions
Differentiation Between Submerged-Orifice and Submerged-Weir Flow Conditions
Data Entry and Program Operation
Unit-Values Time Series Data
Static Data Programs
Control (option 4).
Interpolation (option 5)
Ratings (option 6)
Stage (option 7)
Tainter gates (option 8)
Spillway (option 9)
Locks (option 10)
Lockgates (option 11)
Crest gates (option 12)
Pumps (option 13)
Siphons (option 14)
Plot hydraulic ratings (option 15)
Program Execution and Output
Appendix 1 - Velocity-Fall Method for Computing Submerged-Weir Flow
Appendix 2 - Computation of Vertical Openings at Tainter Gates
Appendix 3 - Classification of Free- and Submerged-Orifice Flow by Proposed Hydraulic Jump Method
Appendix 4 - Unit-Value and Daily-Value Card Formats
This report is available online in pdf format (3 MB): USGS OFR 03-473
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