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SPDSS_Task91_MapIrrigationDistributionSystems_20070109
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SPDSS_Task91_MapIrrigationDistributionSystems_20070109
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Last modified
4/17/2013 10:03:19 AM
Creation date
6/5/2008 1:08:53 PM
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Decision Support Systems
Title
SPDSS Task 91 - Map Wells, Irrigations Systems and Irrigation Service Areas
Description
This memorandum summarizes the procedures for the 2001 irrigated parcel mapping prepared under Task 91 – Map Wells, Irrigation Systems, and Irrigation Service Areas.
Decision Support - Doc Type
Task Memorandum
Date
1/9/2007
DSS Category
GIS
DSS
South Platte
Basin
South Platte
Contract/PO #
C153960
Grant Type
Non-Reimbursable
Bill Number
SB01-157, HB02-1152, SB03-110, HB04-1221, SB05-084, HB06-1313, SB07-122
Prepared By
Riverside Technology inc.
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MEMO -TASK 91, APPENDIX 8 <br />have relatively few decreed wells. The permitted wells in Division 1 are attributed as Division 8. <br />Division 8 represents the designated ground water basins. No decreed wells are present in these locations. <br />The permitted irrigation wells greater than 50 gpm were matched to irrigated parcels using StateDGI. <br />The permitted wells were matched to irrigated parcels in the designated basins using the same approach as <br />above. All of the parcels are irrigated by ground water only and were attributed as such. Common center <br />pivot units were assigned and StateDGI was run. The `We1lParcel' table was edited as before and <br />appended to the first `We1lParcel' table. Within the `We1lParcel' table, the type of well can be <br />determined by looking at the `Perm Date' and the `Appr_Date' attributes. If the `Perm Date' is <br />populated the well is a permitted well If the `Appr_Date' is populated the well is a decreed well. <br />After using RTi matched irrigated parcels to well permits in HydroBase, the SEO suspected that the well <br />permit records do not represent unique well permits. In order to eliminate duplicate well permits recorded <br />in HydroBase, the SEO devised a methodology for selecting only unique well permits. RTi will use this <br />methodology to select unique records from HydroBase and rematch irrigated parcels to well permits to be <br />delivered in a subsequent version. Appendix F contains the memo written by the SEO describing the <br />methodology. <br />Initial delivery of the irrigated parcels contained well match classes of type 6. This was used to define <br />any well parcel match that was done using user supplied information on non-specific ground water use. <br />After review of this delivery the State requested that the type 6 matches be reclassified to describe the <br />parcel's geographic relationship to the well. Following discussion with the State, the type 6 well classes <br />were divided into type 7, 8, and 9, which follow the same definitions as type 1, 2, and 4. Table B.1 <br />describe the class definitions. <br />Page 21 of 55 ~Rlyerslde FecAno[o`(!~Y Inc. <br />4'JaYer Resourer..s Errgi~ecr:np an~i L'ansuFlrnd <br />
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