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Evaluation of techniques for determining average precipitation in semiarid valleys of Idaho Item Info

The Raft River Basin in southcentral Idaho and the Reynolds Creek Experimental Watershed in southwest Idaho were studied to determine precipitation distribution in an attempt to develop better isohyetal maps for somiarid mountain valleys . Due to gage mal functions in the Raft River network, only the data collected by the Agricultural Research Service on Reynolds Creek was analyzed. Two methods were used to determine precipitation distribution. The computer isohyetal method worked well on Reynolds Creek but should be used only where a dense gage network is available. The Thiessen method was preferred in areas where gages are relatively spread out. The Thiessen method, was also used to determine the relative accuracy of the mean precipitation estimate using less than the 45 gages available. A multiple-regression equation was developed for selecting the point precipitation measurements to be used in estimates of average precipitation on the Reynolds Creek Experimental Watershed. Results indicated that no fewer than 20 gages should be used to obtain a good estimate of average precipitation.

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Title:
Evaluation of techniques for determining average precipitation in semiarid valleys of Idaho
Authors:
Curtis, David Lawrence
Date Created (ISO Standard):
1973-03
Description:
The Raft River Basin in southcentral Idaho and the Reynolds Creek Experimental Watershed in southwest Idaho were studied to determine precipitation distribution in an attempt to develop better isohyetal maps for somiarid mountain valleys . Due to gage mal functions in the Raft River network, only the data collected by the Agricultural Research Service on Reynolds Creek was analyzed. Two methods were used to determine precipitation distribution. The computer isohyetal method worked well on Reynolds Creek but should be used only where a dense gage network is available. The Thiessen method was preferred in areas where gages are relatively spread out. The Thiessen method, was also used to determine the relative accuracy of the mean precipitation estimate using less than the 45 gages available. A multiple-regression equation was developed for selecting the point precipitation measurements to be used in estimates of average precipitation on the Reynolds Creek Experimental Watershed. Results indicated that no fewer than 20 gages should be used to obtain a good estimate of average precipitation.
Subjects:
precipitation semiarid climates mountains
Location:
Raft River
Latitude:
46.82
Longitude:
-115.58
Collection:
IWRRI
IWRRI number:
197309
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
Publisher:
University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
wbv
Date Digitized:
2012

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Source
Preferred Citation:
"Evaluation of techniques for determining average precipitation in semiarid valleys of Idaho", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-curtis_1973.html
Rights
Rights:
Rights to the digital resource are held by the University of Idaho. http://www.uidaho.edu/
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