WSP04777

• File Number: 8274.200
• Description: Colorado River Basin Salinity Control - General Basinwide Salinity Issues
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 1/1/1984
• Title: Dissolved Solids Load in the Upper Colorado River Basin
• Water Supply Pro - Doc Type: Report/Study

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Chapter B, qont.

C. Stations selected for this study

1. Description of existing historical data-- 214 stations (App,

A)

2. Selection of records for detailed analysis

a. Criteria for station selection

1. Length of record (App. D)
2, Spatial distribution in the Upper Colorado River
basin '
3, Important Bureau of Reclamation stations

b. Monthly analysis of dissolv~ solids (SLOAD)-- 68 stations
(App. B)
c. Trend analysis-- 20 to 30 strategically located stations

3. Criteria for determining effective period of record
4, Combination of partial records at nearby stations

III. Methods for analyzing dissolved solids data

A, Retrieval, flagging, and editing from WATSTORE (reference to User's
Manual)
B. Computation of monthly load and concentration based on the U.S.
Geological Survey's method (reference to User's Manual)
C, Methods of trend analyses used in this study
(reference to Chapter A and Crawford et al.)

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IV, Analysis of dissolved solids

A. Loads, concentrations, and major constituents

1, Historical mean data for 68 stations (fig. 6, App. C)
2. Historical annual data for 68 stations (fig. 7, App. C)
3, Historical monthly data for selected stations (20-30) (table 1,
App. E)
4. Mean seasonal variation at selected stations (5 or so) (fig. 8,
fig, 10, fig. 11)
5; Dissolved solids yields (fig. 12, table 2)

B. Trends in dissolved solids

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1, Dissolved solids variables

a. Flow-adjusted concentration and its significance (App. G)
b. Load (App, G)
c. Major constituents-- mass fractions CAppo G)
d. Regression parameters (App. F)

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