WSP11706

• File Number: 8271.300
• Description: Colorado River Basin Salinity Control Program - General Information and Publications-Reports
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/1980
• Title: Development of Procedures to Evaluate Salinity Management Strategies in Irrigation Return Flows
• Water Supply Pro - Doc Type: Report/Study

Table 3.2. Continued.

8i&&

Reference

Constituents
nodeled

Cooment

Model
Application

Ribbens (cant.)

'"
o

Utah Water
Research Lab
1975 (SALT)

TIJS

Walker, W. R,
1970

TIJS

M3.jor asSUIlpti~
in salinity node!

~ dependent interactions of
physical processes such as soil-
water transfonoo:tions due to an
irrigation regime IIJJSt be
specified by the user.

'IDS parameter is considered to
be conservative.

Mass balance concepts are em-
ployed. So chanica1 precipi-
tation, dissolution and re-
actions of individual consti-
tuents are not considered.

Cc:IIplete mixing of solute is
assumed.

Flew is assumed to be inde-
pendent of quality, alt:OOugh
quality depends on flow.

Salinity conputations are based
on mean flOW' weighted concen-
trations .

Input data
requirements

TIme
increrrent

Under steady state conditions
the IIDdel conducts flow and
mass balance on a river systan.

It is a one dimensional in-
stream IIDdel.

Water and salt Annual
flows, user options.

Mass balance of water and salt TDS data for infl<M m:mthl y
IWSt = during the IIDdel and outflow.
tine.

Salt flows are asst.ne<l to de-
pend on water flows.

Salt obtained fran an irrigated
area is assumed to be the
quantity of salt outflow which
must occur to naintain an:rDJal
salt balance minus quantity of
salts indicated by gronndwater
outflows with measured salinity
concentrations .

Unlike a dynamic node!, Colorado River
this lIDdel does not shor.v Basin
peak values which might
appear for short periods
of time after a change
in conditions or periodic
variations in existing
conditions.

Root zone salt analyses
require updating.

Grand Valley,
Colorado