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RGDSS_Task6-1_HistoricMonthlyModel_Drainage
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RGDSS_Task6-1_HistoricMonthlyModel_Drainage
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Last modified
9/26/2011 8:33:24 AM
Creation date
7/2/2008 11:11:36 AM
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Decision Support Systems
Title
RGDSS Task 6-1 - Develop Phase IA Historic Monthly Model
Description
Memo documenting development of drainage areas and proration factors.
Decision Support - Doc Type
Task Memorandum
Date
11/4/1999
DSS Category
Surface Water
DSS
Rio Grande
Basin
Rio Grande
Contract/PO #
C153863
Grant Type
Non-Reimbursable
Bill Number
HB98-1189, SB99-173
Prepared By
Leonard Rice Engineering
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Hot Creek 17.49 <br />Fox Creek 20.62 <br />Massey Creek 21.98 <br />Mill /Big Horn Creek 21.46 <br />Trail Creek 22.87 <br />Rito Seco 16.64 <br />San Francisco Creek 26.37 <br />Torcido Creek 22.47 <br />Vallejos Creek 24.13 <br />Upper Clover Creek 23.41 <br />Upper San Louis Creek 18.16 <br />Upper Saguache Creek 22 57 <br />Upper La Garita Creek 27 68 <br />Upper Carnero Creek 23.44 <br />West Indian Creek 20.04 <br />Upper Sand Creek 26.49 <br />Upper Ute Creek 23.76 <br />Ojito Creek 14.29 <br />Mendano Creek 19.85 <br />Zapata Creek 23.51 <br />Upper Sange de Cristo Creek 19.40 <br />Upper Ventero Creek 20 97 <br />Brook Creek 19.10 <br />Upper Rock Creek 18.46 <br />Raton Creek 19.96 <br />Proration Factors <br />The proration factors for ungaged baseflow locations used by StateMod are calculated by the <br />makenet DMI using information in the makenet input file (rg .net). The basin area and average <br />precipitation data are included on each makenet record representing a baseflow node in the <br />network. Makenet automatically finds upstream and downstream gages and prorates the gains <br />accordingly. However, these automatic calculations can be overridden using commands in the <br />makenet command file (make commands . cf). These commands can change the gage <br />locations used in the proration calculations or even replace the calculated proration factor with <br />another predetermined factor. <br />For this phase of the RGDSS Statemod development, proration factors were developed using the <br />default upstream and downstream gages when feasible, and using gages in hydrologically similar <br />basins when necessary. The factors use the basin areas and average precipitations calculated <br />using GIS techniques. The initial proration factors for ungaged baseflow locations are shown in <br />C:\cdss\Task6-l.doc Drainage Areas and Proration Factors November 4, 1999 -Page 8 of 11 <br />
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