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Estimation of streamflow characteristics and assessment of trends in the Niobrara River at Mariaville, Nebraska

Water-Resources Investigations Report 87-4073

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Abstract

A computer model was used to synthesize a long-term streamflow record for the Niobrara River at Mariaville, Nebraska. The record was developed on the basis of 30-plus years of streamflow data from 3 upstream sites, and the U. S. Geological Survey 's CONROUT model was calibrated using 294 days of measured flow at Mariaville; for the calibration period, 87% of the synthesized daily discharges were within 15% of the measured values. The synthesized record was analyzed for trends in streamflow characteristics. A marked decrease in the average consecutive-day, low-flow discharges was detected after 1964, ranging between 162 cu ft/sec less for the 1-day low flow and 200 cu ft/sec less for the 14-day low flow. The decrease probably was caused by the start-up of operations at Merritt Reservoir. (Author 's abstract)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Estimation of streamflow characteristics and assessment of trends in the Niobrara River at Mariaville, Nebraska
Series title:
Water-Resources Investigations Report
Series number:
87-4073
Edition:
-
Year Published:
1987
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
iv, 25 p. :ill., maps ;28 cm.