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Analysis and generation of low flow sequences for Idaho streams using disaggregation modeling. Research technical completion report, G903-03 Item Info

Stochastic models of streamflow were developed for two rivers in Idaho, and the results analyzed to assess model performance and the characteristics of droughts. Multivariate modeling methods were applied to both historical records to extend their length, based on nearby longer-term records, and the unextended and extended data then used to determine subsequent model parameters. Annual flow models, coupled with condensed parameter disaggregation models, were applied to generate 40,000 year of annual/monthly streamflow records. The statistics and probability distributions of the annual and monthly flows comprising drought sequences are presented, and the theory of runs is used to estimate return periods of historical drought events. It is concluded that the assignment of probabilities to droughts based on historical record length yields inconsistent results when compared to the long-term stochastic process, and that data extension has a significant effect on critical model and run-definition parameters, providing improved estimates of population statistics. Procedures are suggested for using the modeling results for storage reservoir design, and for developing regionalized drought characteristics for Idaho streams. Submitted to the U.S. Geological Survey.

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Title:
Analysis and generation of low flow sequences for Idaho streams using disaggregation modeling. Research technical completion report, G903-03
Authors:
Horn, Dennis R.; Dieziger-Kim, Donna
Date Created (ISO Standard):
1985-11
Description:
Stochastic models of streamflow were developed for two rivers in Idaho, and the results analyzed to assess model performance and the characteristics of droughts. Multivariate modeling methods were applied to both historical records to extend their length, based on nearby longer-term records, and the unextended and extended data then used to determine subsequent model parameters. Annual flow models, coupled with condensed parameter disaggregation models, were applied to generate 40,000 year of annual/monthly streamflow records. The statistics and probability distributions of the annual and monthly flows comprising drought sequences are presented, and the theory of runs is used to estimate return periods of historical drought events. It is concluded that the assignment of probabilities to droughts based on historical record length yields inconsistent results when compared to the long-term stochastic process, and that data extension has a significant effect on critical model and run-definition parameters, providing improved estimates of population statistics. Procedures are suggested for using the modeling results for storage reservoir design, and for developing regionalized drought characteristics for Idaho streams. Submitted to the U.S. Geological Survey.
Subjects:
Stochastic hydrology Computer models River flow Drought History
Location:
Teton River; Southeastern Idaho; Palouse River; Northern Idaho
Latitude:
43.93
Longitude:
-111.45
Additional Lat-Long:
46.89, -117.37
Collection:
Palouse Basin Boise Basin
Series:
Water for Idaho
IWRRI number:
198504
Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Publisher:
Idaho Water Resources Research Institute; University of Idaho
Contributing Institution:
University of Idaho
Type:
Text
Format:
application/pdf
Cataloger:
KIT
Date Digitized:
2017-08-31

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Preferred Citation:
"Analysis and generation of low flow sequences for Idaho streams using disaggregation modeling. Research technical completion report, G903-03", Idaho Waters Digital Library, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iwdl/items/iwdl-198504.html
Rights
Rights:
In copyright, educational use permitted. Educational use includes non-commercial reproduction of text and images in materials for teaching and research purposes. For other contexts beyond fair use, including digital reproduction, please contact the University of Idaho Library Special Collections and Archives Department at libspec@uidaho.edu. The University of Idaho Library is not liable for any violations of the law by users.
Standardized Rights:
http://rightsstatements.org/vocab/InC-EDU/1.0/
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