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Gypsum saturated water


I have a few questions for the group concerning the handling of gypsum saturated water. An individual with a 5000 TDS water of mostly calcite and gypsum composition, is looking to sprinkle-irrigate a fescue turf and some trees and shrubs, particularly Aspen and Lilac.

First of all, does anyone have a good idea of how much the precipitation of gypsum and calcite is going to affect the soil solution EC and is there going to be a real salinity effect on the above mentioned plants? (this question is probably not directly pertinent to this discussion group, but thanks for your ideas).

Secondly, since most of you are constantly dealing with the plugging of irrigation systems by salts, what are some of the best ways for this individual to prevent salt precip in-line on his delivery system? Is the lowering of pH going to be sufficient/effective in preventing the plugging of his systems?

by Grant Cardon


I have a few questions for the group concerning the handling of gypsum saturated water. An individual with a 5000 TDS water of mostly calcite and gypsum composition, is looking to sprinkle-irrigate a fescue turf and some trees and shrubs,particularly Aspen and Lilac.

(NO SALT TOLERANCE INFORMATION AVAILABLE. SEE PAGE 284 AND 285 IN ASCE MANUALS AND REPORTS ON ENGINEERING PRACTICE #71 AGRICULTURAL SALINITY ASSESSMENT AND MANAGEMENT.

First of all, does anyone have a good idea of how much the precipitation of gypsum and calcite is going to affect the soil solution EC and is there going to be a real salinity effect on the above mentioned plants? WATSUIT ( see chapter 22 in the above manual) IS A COMPUTER PROGRAM WHICH ACCOUNTS FOR SALT PRECIPITATION EFFECTS ON SOILSALINITY. IF YOU NEED A COPY, I CAN ARRANGE TO HAVE A COPY SENT TO YOU. (this question is probably not directly pertinent to this discussion group, but thanks for your ideas).

Secondly, since most of you are constantly dealing with the plugging of irrigation systems by salts, what are some of the best ways for this individual to prevent salt precip in-line on his delivery system? Is the lowering of pH going to be sufficient/effective in preventing the plugging of his systems?

ADJUSTING THE PH TO ABOUT 6.5 WITHAN ACID WOULD PREVENT PRECIPITATION OF CALCITE. BUT IT WOULD NOT HAVE ANY EFFECT ON GYPSUM PRECIPITATION.

PERHAPS GYPSUM PRECIPITATION WILL NOT BE A PROBLEM. WATSUIT WOULD PROVIDE USEFUL INFORMATION ABOUT THIS POTENTIAL PROBLEM.

by J.D.(Jim) Oster