Intermittent evaporation, moisture distribution, and salt redistribution through saline-sodic clay soil as affected by irrigation frequency and quantity

M. H. Dahab, M. A. Mustafa, H. A. Abdel Rahman

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

We investigated the effects of three intervals (5, 10, and 20 d) and four total amounts of irrigation water (120, 240, 360, and 480 mm) applied at two rates (3 or 6 mm/d)3on intermittent evaporation, soil moisture distribution, and salt redistribution through saline-sodic clay soil columns with initial zonal distribution of salts. The results indicated that after a threshold period, which was longer for the lower rate of water application, cumulative evaporation (E) increased with decrease in irrigation interval. In accordance with previous findings, E was a linear function of the square root of time, i.e., E = c √t, where c, under the experimental conditions, is largely determined by the amount of water applied per irrigation. The transmission zone of the moisture distribution profiles lengthened and the wetting front advanced deeper, and consequently salt leaching improved as time progressed and as the irrigation interval and the amount of water applied increased. The sodium adsorption ratio profiles qualitatively followed the electrical conductivity, EC1:5, redistribution patterns. The depth of the wetting front and the amount of the water stored accounted for 97.4 and 96.8% (r.001= 0.872) of the variability of the depth of the desalinized zone, respectively. The amount of the stored water accounted for 68% (r.01= 0.765) of the variability of the weighted mean EC1:5of the desalinized zone.

Original languageEnglish
Pages (from-to)168-175
Number of pages8
JournalSoil Science
Volume146
Issue number3
Publication statusPublished - 1988

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sodic soils
sodic soil
irrigation rates
irrigation scheduling
clay soil
clay soils
evaporation
moisture
irrigation
salt
salts
wetting front
water
irrigation water
electrical conductivity
soil column
leaching
adsorption
distribution
sodium

ASJC Scopus subject areas

  • Soil Science
  • Earth-Surface Processes

Cite this

Intermittent evaporation, moisture distribution, and salt redistribution through saline-sodic clay soil as affected by irrigation frequency and quantity. / Dahab, M. H.; Mustafa, M. A.; Abdel Rahman, H. A.

In: Soil Science, Vol. 146, No. 3, 1988, p. 168-175.

Research output: Contribution to journalArticle

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