CRDSS_Task2-09-18_DMIs_IrrigationData

• Title: CRDSS Task 2.09-18 - Consumptive Use Model - CU Model DMIs for Irrigation Data
• Description: This task memo describes the CU model DMI''s for Irrigation Data.
• Decision Support - Doc Type: Task Memorandum
• Date: 11/29/1996
• DSS Category: Consumptive Use
• DSS: Colorado River
• Basin: Colorado Mainstem
• Contract/PO #: C153658, C153727, C153752
• Grant Type: Non-Reimbursable
• Bill Number: SB92-87, HB93-1273, SB94-029, HB95-1155, SB96-153, HB97-008
• Prepared By: Riverside Technology inc.

This task memorandum will discuss the cucommon, cuclimat, and cucropco DMIs. The cunonet DMI is
discussed in Task Memorandum 2.09-19: Cunonet DMI-Returns for the CU Model Other Uses.
2.0 DISCUSSION/ANALYSIS
The CU Model uses data from the CRDSS Informix Database when a new scenario is created using the
CU Model Interface. These data are retrieved from the Informix database using several high level DMI
routines that format data into input files.
Data are retrieved from the Informix database depending on the sub-area type and location specified by
the user in the Create Scenario window. Data can be retrieved based on units of Counties, Hydrologic
Units, County/HUC combinations, structures, or individual fields by geoloc number. To select sub-areas
graphically, the user can use the Create Scenario from the CRDSS CU Model Interface.
The Create Scenario option will access the relational database and retrieve data using the following high
level DMI routines:
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* cucommon - Returns CU Model Input File for Common Data
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* cuclimat - Returns CU Model Input Files for Climate Data
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* cucropco - Returns CU Model Input File for Crop Coefficients
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* cunonet - Returns CU Model Input File for Other Uses (Task Memorandum 2.09-19)
3.0 cucommon DMI
The cucommon DMI generates a formatted common-data file required by both the irrigation and non-
irrigation components of the CU model. Files having ?.cmn? as a suffix, contain general information
common to the irrigation and non-irrigation components.
The general function of this DMI is to return formatted data for sub-areas in the specified time period.
The cucommon DMI uses a control file to define time period parameters for model data. The parameters
are placed in a data structure and passed to a low level DMI. The low level DMI queries the database and
returns requested data to the cucommon DMI. The data are written to a formatted data file used as input
for the CU Model.
3.1 cucommon DMI Inputs
The DMI is passed the name of a control file defining the time parameters and sub-areas selected by the
user through the CU Model Interface. These parameters are specified in the Create Scenario Window and
saved into a control file. This file is read by the DMI as it builds the low-level DMI input data structure.
Control files have ?.ctl? as a suffix. For more information about the ?.ctl? file format, see the man page
for cu_ctl.
Area and time parameters specified in the control panel:
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A list of spatial identifiers describing the specified sub-area. (county name, water district number,
hydrologic unit number, combination [county, hydrologic unit], combination [water district, id], or
Location Number [geoloc_num] ).
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The begin year for the model run.
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The end year for the model run (>= begin year).
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11.29.96 2.09-18 IDS/CSU