Premium
Water‐Drop Kinetic Energy Effect on Water Infiltration in Calcium and Magnesium Soils
Author(s) -
Keren R.
Publication year - 1989
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1989.03615995005300060002x
Subject(s) - soil water , chemistry , adsorption , magnesium , kinetic energy , dispersion (optics) , ion , hydration energy , drop (telecommunication) , inorganic chemistry , environmental chemistry , soil science , geology , telecommunications , physics , optics , organic chemistry , quantum mechanics , computer science
The effect of adsorbed Mg and Ca ions on the infiltration rate (IR) of two montmorillonitic soils (Calcic Haploxeralf and Typic Rhodoxeralf) at several kinetic energies of water drops was studied. The kinetic energy of the water drops, the type of adsorbed ion and the electrolyte concentration in the applied solution all have a strong effect on the IR of the soils saturated by Mg or Ca ions. The higher IR values of the soils exposed to electrolyte solution suggests that clay dispersion takes place in Mg and Ca soils exposed to deionized water from simulated rainfall. The IR of the soils decreased with increasing kinetic energy and the values were always lower for Mg soils than for Ca soils. This difference was attributed to the higher width of the hydration shell of the adsorbed Mg than the Ca ion. Breakdown of the soil aggregates and clay dispersion are the two mechanisms that appear to be operative in seal formation when soils are saturated by either Ca or Mg ions exposed to deionized water. Magnesium adsorbed by montmorillonitic soils has a specific effect on IR, whether the soils contain CaCO 3 or not.