The Micro vs. Mainframe in Hydrologic Modeling and Forecasting

by Douglas D. Speers, US Army Corps of Engineers, North Pacific Div, USA,
David M. Rockwood, US Army Corps of Engineers, North Pacific Div, USA,
Edward Davis, US Army Corps of Engineers, North Pacific Div, USA,



Document Type: Proceeding Paper

Part of: Hydraulics and Hydrology in the Small Computer Age

Abstract: This paper describes and compares the performance, application, and suitability of a microcomputer as host for the large-scale hydrologic model called SSARR. The SSARR Model is currently employed for operational forecasting in the Columbia River basin by the Corps of Engineers and National Weather Service. The principle host computer is an Amdahl 470V6 with IBM-MVS software. The micro-computer based version of SSARR was built from the same FORTRAN-77 source statements used on the Amdahl. A typical forecast simulation is presented as a case study for comparing execution by both the mainframe and micro computer.

Subject Headings: Hydrologic models | Computer software | Computer models | Forecasting | Case studies | Structural models | Rivers and streams | Basins

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