Distribution of two computer programs for surface-water hydraulic computations: CAP--Culvert Analysis Program and SAC--Slope-Area Computations To: "A - Division Chief and Staff", "B - Branch Chiefs and Offices", "FO - State, District, Subdistrict and other Field Offices", "PO - Project Offices" cc: " , WRD Archive File, Reston, VA ", "Annette L Ledford, Clerk Typist, Reston, VA " Subject: OSW Technical Memorandum No. 97.01 Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Date: Mon, 21 Oct 1996 10:53:39 -0400 From: "Annette L Ledford, Clerk Typist, Reston, VA " In Reply Refer To: October 11, 1996 Mail Stop 415 OFFICE OF SURFACE WATER TECHNICAL MEMORANDUM NO. 97.01 SUBJECT: Distribution of two computer programs for surface-water hydraulic computations: CAP--Culvert Analysis Program and SAC--Slope-Area Computations This memorandum provides information about two new computer programs for surface-water hydraulic computations. The programs are the Culvert Analysis Program (CAP) and Slope-Area Computations (SAC). CAP can be used to compute discharges or water-surface elevations in culverts. It will compute discharge coefficients for types 1, 2, and 3 culvert flows and interpolate between high-head and low-head flows when needed. The methodology on which the CAP program is based is described in Techniques of Water-Resources Investigations (TWRI), Book 3, Chapter A3, Measurement of Peak Discharge at Culverts by Indirect Methods. The CAP program supersedes computer program A526 and provides for computation of flow conditions that program A526 could not handle. The CAP program is documented in Open-File Report 95137, User's Guide to the Culvert Analysis Program by Janice M. Fulford. SAC can be used to compute discharges in a reach from high-water marks and surveyed cross-section data. It will compute a mean water-surface elevation for sections with non-level water surfaces, either by conveyance weighting or by averaging water-surface elevations at the banks. The methodology on which the SAC program is based is described in TWRI, Book 3, Chapter A2, Measurement of Peak Discharge by the Slope- Area Method. The SAC program is documented in Open-File Report 94-360, User's Guide to SAC--A Computer Program for Computing Discharges by Slope-Area Method by Janice M. Fulford. Both programs use input files that are formatted according to the same rules used in the Water-Surface PROfile (WSPRO) model. This design feature should help users to consolidate channel geometry data into a common format. For questions on program content, application, and (or) theory, or to obtain paper copies of Open-File Reports 95-137 and 94-360, contact the author at: Chief, Deterministic Modeling Project U.S. Geological Survey, OSW Building 2101 Stennis Space Center, MS 39529 Electronic Mail: jfulford@usgs.gov Phone: 601-688-1501 Fax: 601-688-1577 Software distribution packages, consisting of compiled or executable code, test data sets, and documentation files (including PostScript versions of the reports), have been prepared for the Data General AViiON DG/UX and personal computer (PC) MS-DOS platforms. These distribution packages are available for electronic retrieval via the World Wide Web (WWW) at: http://h2o.usgs.gov/software/ and via anonymous File Transfer Protocol (FTP) from: h2o.usgs.gov (path: /pub/software). Thomas H. Yorke Chief, Office of Surface Water WRD Distribution: A, B, FO, PO