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WSP09785
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Last modified
1/26/2010 2:55:49 PM
Creation date
10/12/2006 3:55:31 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8142.600.30.A
Description
Trinidad Project - Studies - Other Studies - Purgatoire river transit loss study
State
CO
Basin
Arkansas
Water Division
2
Date
1/1/1993
Author
USGS
Title
Evaluation of Streamflow Traveltime and Streamflow Gains and Losses Along the Lower Purgatoire River Southeastern Colorado 1984-1992
Water Supply Pro - Doc Type
Report/Study
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<br />0811 <br /> <br />2.2 <br /> <br />MEAN ANNUAL AIR TEMPERATURE = 52 DEGREES FAHRENHEIT <br />MEAN ANNUAL PRECIPITATION = 12.9 INCHES <br /> <br />2.0 <br /> <br /> 1.8 <br /> 1.6 <br />ffl <br />:I: <br />~1.4 <br />;; <br />Z <br />Q 1.2 <br />~ <br />ii: <br />[51.0 <br />w <br />a: <br />"- <br /> 0.8 <br /> 0.6 <br /> 0.4 <br /> 0.2 JAN <br /> <br /> <br /> <br />FEB <br /> <br />MAR <br /> <br />APR <br /> <br />MAY <br /> <br />JUNE <br /> <br />Figure 2. Mean monthly precipitation and mean monthly air temperature near Hoehne, 1947-92. <br /> <br />There are no diversions between the last PRWCD <br />lands (downstream from site Q I C) and the Ninemile <br />Canal [upstream from site Q3A (fig. I)]. Downstream <br />from Ninemile Canal, streamflow is diverted <br />by two canals to about 4,500 acres of cropland <br />(Duane Helton, Tipton and Kalmbach, Inc., written <br />commun., 1984). Diversion records indicate that <br />average diversion in the study area was about <br />73,200 acre-ftIyr during 1957-67 and about <br />71,800 acre-ftlyr during 1984-92 (R.D. Petersen, <br />Colorado Department of Natural Resources, written <br />commun., 1994). <br /> <br />Previous Studies <br /> <br />No comprehensive studies of water resources <br />for the entire lower Purgatoire River have been <br />completed. Many of the previous studies that have <br />been completed in the study area addressed local <br />problems and were made prior to the commencement <br />of operation of Trinidad Reservoir in the late 1970's. <br />The review of these earlier studies indicated that <br />published and unpublished reports relating to <br /> <br /> <br />. PRECIPITATION <br /> <br />D AIR TEMPERATURE 80 <br />l:: <br />w <br />:I: <br />Z <br />W <br />a: <br />:I: <br />70 ~ <br />UJ <br />W <br />W <br />0: <br />'-' <br />w <br />60 0 <br />;; <br />W <br />a: <br />::> <br />~ <br />50 ffi <br />"- <br />" <br />W <br />t- <br />a: <br />;;' <br /> <br /> <br /> <br />JULY <br /> <br />AUG <br /> <br />SEPT <br /> <br />OCT <br /> <br />NOV <br /> <br />DEC <br /> <br />90 <br /> <br />40 <br /> <br />30 <br /> <br />previous surface-water investigations in the study <br />area generally were limited to a specific hydrologic <br />condition that occurred in a particular locality along <br />the river. <br />Some of the earliest studies of streamflow <br />were done in the 1920's (Colorado Department of <br />Natural Resources, written commun., 1925) and <br />indicated a sharp decrease in streamflow between <br />Trinidad (site QIA) and Hoehne [site QIB (fig. I)], <br />which was attributed to irrigation diversions upstream <br />from Hoehne. Farther downstream, an increase in <br />streamflow was observed between Hoehne and <br />Alfalfa [site QIC (fig. I)] and generally was <br />attributed to irrigation return flows. These studies <br />also reported a decrease in streamflow between <br />Alfalfa and the Highland Canal (about 110 mi <br />downstream from Alfalfa) during periods of reason- <br />ably steady water stage using occasional field <br />measurements of streamflow along the river. <br />However, the studies apparently did not always <br />include a detailed accounting of tributary streamflow <br />and irrigation activities that occurred along the river. <br />These studies resulted in court decree no. 1325 <br />[Bent County District Court (September 8, 1925)] <br /> <br />INTRODUCTION 5 <br />
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