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RGDSS Final Memorandum <br />To: Ray Bennett, Ray Alvarado, and Andy Moore <br />From: Agro Engineering, Inc., Kirk Thompson <br />Subject: Irrigated Lands Assessment, Task 1. <br />Date: July 24, 2000 <br />The following report describes the approach and results for Task 1 -Irrigated Lands Assessment <br />portion of RGDSS. The purpose of the irrigated lands assessment was to determine the extent (i.e. <br />irrigated parcel boundary and ditch service area), and character (i.e. crop type) of irrigated lands in <br />the Rio Grande Basin. The character (i.e. land cover classification) of all lands within the ground <br />water model area was also determined. Other RGDSS contractors will use this information to <br />estimate consumptive uses in the basin. Four major GIS products were developed as part of the <br />irrigated lands assessment: <br />1) a ditch service area theme was produced to delineate the service area boundaries of the surface <br />water structures in the basin, <br />2) a composite false color satellite image was developed to serve as a raster backdrop to other GIS <br />themes, <br />3) an irrigated parcel theme was developed to delineate the boundary and important attributes of the <br />irrigated parcels within the basin, <br />4) a land cover classification theme (irrigated and non-irrigated) was developed to assist in <br />determining the consumptive use of the non-irrigated portions of the basin. <br />