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

RGDSS Memorandum
Final
To: Ray Bennett, Ray Alvarado, and Andy Moore
From: LRCWE, Ross Bethel and Erin Wilson
Subject: Rio Grande Historic Crop Consumptive Use -Soil Moisture Capacities
Date: June 5, 2000
Introduction
This memorandum describes the approach and results obtained under Task 3.3 -Assign
Soil Moisture Capacities to Parcels and Structures. Soil moisture capacities are used by
StateCU to determine historic water supply-limited consumptive use.
This task includes:
1. Determining the weighted available water capacity (AWC) values (in inches per inch)
for each soil type polygon defined on the Colorado based STATSGO map, and create
an associated ArcView theme.
2. Use the ArcView coverage to determine the average available water capacity for
irrigated parcels and ditch systems.
3. Prepare the results for use in StateCU.
Approach and Results
Determine the weighted AWC values and create ArcView lam
The following steps were performed to determine the weighted AWC values and create
an associated ArcView theme for use in the RGDSS project.
A map of major soil types for the Rio Grande Basin was obtained from the CDSS
web site at http:~dss.state.co.us. This map was prepared by the RGDSS GIS
contractor (HDR Engineering) based on State Soil Geographic (STATSGO)
databases of the National Resources Conservation Service (MRCS). This map theme,
named ~oils;'was downloaded as an Ar cView GIS shapefile. The associated
attribute table for each delineated soil polygon includes a 5-character map unit
identifier (field Muic~. There are 199 polygons (excluding twater'~olygons
associated with reservoirs and lakes) in the Rio Grande Basin.
2. Additional STATSGO tables of data attributes were obtained from the RGDSS GIS
contractor. The originals of these tables as well as the soils map theme were obtained
appendC_cropcu.doc G1 of C-4 June 5, 2000