Irrigation Water Salt Concentration Influences on Sediment Removal by Ponds

Robbins, C.W. and Brockway, C.E. (1978) Irrigation Water Salt Concentration Influences on Sediment Removal by Ponds. Soil Science Society of America Journal. 42(3):478-481.

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Abstract

Irrigation water salt concentration effects on sediment pond efficiency
were investigated to demonstrate the necessity of considering
the salt concentration in the irrigation waters when designing
sediment retention ponds. The influence of dissolved salt was determined
by adding concentrated CaCl2 solutions to three ponds and
then measuring electrical conductivities and sediment concentrations
at the pond outlets. Increasing the salt concentration increased the
sediment removal efficiencies when the retention time in the pond
exceeded 1 hour or the inflow sediment concentration exceeded 500
ppm for the three soils studied. Adding salt to laboratory soil sample
suspensions increased the settling rates for the two soils studied. That
data indicate that the salt concentration in irrigation water is an
important factor in determining sediment pond size and retention
time. Using pond design criteria obtained from sediment ponds
receiving water of a given salt concentration to design ponds that will
receive water with a different salt concentration should include
adjustments for salt concentration differences. A simple laboratory
test is suggested to predict which soils will respond to irrigation water
salt concentration changes that are likely to result in sediment pond
efficiency changes.

Item Type:	Article
NWISRL Publication Number:	0405
Subjects:	Irrigation > Furrow irrigation > Runoff losses > Sediment Mass Import - autoclassified (may be erroneous)
Depositing User:	Dan Stieneke
Date Deposited:	20 Nov 2010 21:52
Last Modified:	02 Feb 2017 16:17
Item ID:	338
URI:	https://eprints.nwisrl.ars.usda.gov/id/eprint/338