WSP02740

• File Number: 8510.100.60
• Description: Rio Grande Compact Commission
• Basin: Rio Grande
• Water Division: 3
• Date: 1/1/1973
• Title: Report of the Rio Grande Compact Commission 1973
• Water Supply Pro - Doc Type: Report/Study

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32

RIO GRANDE COMPACT COMMISSION REPORT

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ACCURACY OF RECORDS

The Rules and Regulations of the Commission state that the equipment,
method, and frequency of measurement at each gaging station shall be
sufficient to obtain records at least equal in accuracy to those cla~sified
as "good" by the U.S. Geological Survey. Within the physical limitations
of stream gaging, the agencies obtaining the records at Compact gaging stations
have complied with these regulations.

The station description states the degree of accuracy of the records.
"Excellent" indicates that, in general, the error in the daily records is
believed to be less than 5 percent; "good" less than 10 percent; "fairll less
than 15 percent; and "poor'! probably more than 15 percent. The records of
monthly runoff are, in general, more accurate than the daily records. These
standards of accuracy are the same as those followed by the U.S. Geological
Survey.

ERRATA

The minutes of the Sixth Annual (Sixteen) Meeting of the Rio Grande
Compact Commission state in part:

"--factual data used in the compilation of
reports of the Commission which factual data
had been revised and published by the D.S.G.S.
.---subsequent to use by the Compact
Commission in computing debits and credits
should be published in succeeding reports of
the Commission together with proper explanatory
notes."

The Rio Grande Compact provides that the Annual Report of the Commission
for each calendar year shall be transmitted to the Governors of the signatory
states before March first of the following year. Although every effort is
made to furnish correct data to the Commission for use in their report, the
limited time available to the collecting agency does not permit a thorough
analysis of the data and they are necessarily subject to revision.

The Commission bases all computations of debits and credits on volumes
in thousands of acre-feet, expressed to the nearest hundred. A check was
made of all records published in these annual reports against those published
by the U.S.G.S. and it was found that in most instances the changes were not
of sufficient magnitude to affect the computations of debits and credits;
other changes were of items not used by the Commission; but whenever a
corrected value affected the computations of credits or debits, such revisions
have been published. The effect of changes or revisions on the credits,
debits or departures from normal release have been adjusted from time to time
by appropriate correction entries.

The figures shown below are the corrected values of runoff in acre-feet
for the calendar year 1972.

Willow Creek above Heron Reservoir
near ChamaJ N. Mex.

January
February
March
April
May
June
July
August
September
October
November
December

307
3,320
6,500
9,200
10,910
8,910
621
90
890
16,350
4,750
2,130

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