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, Andy Moore
From: LRCWE, Erin Wilson and Ross Bethel
Subject: Rio Grande Historic Crop Consumptive Use -Climate Station Assignments
Date: September 21, 1999
Introduction
This memorandum describes the approach and results obtained under Subtask 3.2,
"Assign Climate Stations to Irrigated Parcels" for the Historic Crop Consumptive Use
Determinations (Task 3).
Approach and Results
ArcView coverages were used to assign climate stations and associated weights to
County/HUC combinations. In addition, default County/HUCs were assigned to water
districts for use when County/HUC information is not available in HydroBase. The
following procedure was followed in completing this task:
1. The key climate stations identified and filled in Subtask 2.1 where highlighted on the
Climate Station ArcView coverage. Their elevations where added to the associated
ArcView database. Table 1 shows the climate stations and the corresponding unfilled
period of record, elevation, and average annual temperature and precipitation for the
period of record.
2. The County and HUC ArcView coverages where combined to determine the
County/HUC combinations in the Rio Grande basin. These County/HUC
combinations are the basis for climate station assignments.
3. The GIS coverage showing irrigated acreage for identified service areas, and the GIS
coverage of diversion structure locations where both added to the GIS project. These
coverages were used to represent the probable location of irrigated acreage both
within and outside of identified service areas.
4. Based on the coverages from Step 3, coupled with topographic and land ownership
information from 1:50,000 USGS County maps and engineering judgement, the likely
centroid of irrigated acreage was identified for each County/HUC combination and
placed on a layer in the GIS project. Figure 1 shows the location of these centroids,
the County and HUC outlines, the GIS irrigated acreage, the GIS diversion structure
locations, and the location of the climate stations in the basin.
5. The elevation of the centroids of irrigated acreage where identified from the USGS
County maps. The distance from the centroid of irrigated acreage to the nearest
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