RGDSS_Historic_CUreport_20040601

• Title: RGDSS - Rio Grande Historic Crop Consumptive Use Analysis
• Description: The documentation is for the Rio Grande Basin Historic Crop Consumptive Use Analysis, developed during the RGDSS implementation for the period 1950 through 2002. It includes 100 percent of the crop consumptive use in the basin for the period. Documentation consists of the final Historic Crop Consumptive Use Analysis Report and supporting appendices.
• Decision Support - Doc Type: Modeling Dataset Documentation
• Date: 6/1/2004
• DSS Category: Consumptive Use
• DSS: Rio Grande
• Basin: Rio Grande
• Contract/PO #: C153863
• Grant Type: Non-Reimbursable
• Bill Number: HB98-1189, SB99-173
• Prepared By: Leonard Rice Engineering

The following terms are commonly used in the CDSS efforts:
Hydrologic Unit Code (HUC) An 8-digit number defining a geographic area,
delineated by the U. S. Geological Survey, representing part or all of a surface
drainage basin.
Irrigated Parcel An irrigated "field" having the same crop type and irrigation
method (sprinkler or flood) not divided by a large feature, such as river or
highway.
Ditch Service Area The area of land that a ditch system has either the physical
ability or the legal right to irrigate. Note that a ditch service area often includes
farmhouses, roads, ditches, fallow fields and undeveloped lands. Therefore a
ditch service area is typically greater than the land irrigated under that ditch.
Key Diversion Structure A ditch system that is modeled explicitly in both the
StateMod water resources planning model and the StateCU historic consumptive
use model efforts. Ditch systems are generally defined as key if they have
relatively large diversions, have senior water rights, or are important for
administration.
Diversion System Structure A combination of key ditch systems where
diversions are co-mingled to serve the same irrigated parcels.
Aggregated Diversion Structure A group of non-key structures. Aggregated
diversions are typically aggregated based on location; e.g. diverting from the
same river reach or tributary.
Ground Water Only Structure A group of irrigated parcels without a surface
water source. Ground water only lands are typically aggregated based on
location; e.g. those that fall within the same Unit Response Function (URF) zone
defined by the Rio Grande Ground Water Model.
HydroBase The State of Colorado's relational database used in the CDSS efforts.
HydroBase contains historic, real-time, and administrative water resources data.
Data Management Interface (DMI) A CDSS program that allows data to flow
from HydroBase to the CDSS models using an automated data-centered approach.
StateMod The CDSS water allocation model used to analyze historic and future
water management policies.
Natural Sub-irrigation Ground water supplied to meet a crop evapotranspiration
demands due to a high ground water table.
cureport_6-2004.doc 12 of 48 June, 2004