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CRDSS <br />TASK MEMORANDUM 1.14-9 <br />Consumptive Use Model <br />Design Summary for the Consumptive Use Model Prototype <br />1.0 ISSUE <br />This task memorandum summarizes the design features of the consumptive use (CU) model prototype <br />developed during Year 1. <br />2.0 DISCUSSION/ANALYSIS <br />The CU model provides the user with a modeling environment that incl udes the selection and <br />modification of parameters used to estimate consumptive use for a given area and time period. The CU <br />model is composed of a FORTRAN program an d a graphical user interface (GUI). A GUI is an icon, <br />menu, and visual display interface. The CU model program can be used separately from the interface to <br />accommodate users on any computer platform. <br />The CU model interface is a GUI written in the C programming language. It is also constructed using the <br />Motif (OSF 1991) toolkit from the Open Software Foundation (OSF). The Motif toolkit is based on the <br />X Toolkit Intrinsics (Xt) (Quercia and O'Reilly, 1990) and is written for the X Window System. The CU <br />model interface uses geographic information systems (GIS) for spatial analysis and display. Specifically, <br />the Geographic Resources Analysis Support System (GRASS) is used to display and manipulate spatial <br />data within the CU model interface. The CU model interface is used on UNIX Workstations running the <br />X Windows System. The specific platform for the development effort is Silicon Graphics Incorporated <br />Mosaic <br />(SGI) workstations. These tools are described in greater detail in the on-line documentation. <br />The CU model program is a FORTRAN (FORmula TRANslator) program that can be run from the CU <br />model interface or separately from the command line. The CU model program (run_cu) estimates water <br />used consumptively for agricultural or other uses. Man pages are available on-line for this program. <br />The task leader for the CU Team is Dr. Luis Garcia (IDS). Engineers working on the project include <br />Isam Al-Azzawe (IDS), Jim Burrell (RTi), Henry Manguerra (IDS), Herve Raymond (IDS), and Ivan <br />Walter (WW Wheeler). Programmers include David Cowels (IDS), Zhaohui Hong (IDS), and Neela <br />Srinivasan (IDS). On-line documentation was developed by Bob Lange (IDS) a nd the Spatial Coverages <br />were developed by Mario Mejia (IDS) and Scott Bartling (RTi). <br />Selecting Areas <br />Counties and hydrological units (HU) were broken up to include each combination of the intersection of <br />a county and an HU. Therefore, the consumptive use can be estimated for counties, HUs, river basins, <br />water divisions, or water districts. These areas are selected individually from menu items in the model's <br />GUI. A more flexible GIS approach to selecting the area is a design feature considered for Year 2. <br />1 <br />A275 01.09.95 1.14-9 Lange <br />