NDLI: Effect of initial water content on saturated hydraulic conductivity in desalinization with slaking and drying

Content Provider	Springer Nature Link
Author	Shamim, Abul Hasnat Md. Akae, Takeo
Copyright Year	2010
Abstract	Soil slaking is an environment-friendly technique that is gaining importance in restoring saline soils. The objective of this article is to evaluate the effect of initial water content (IWC) on saturated hydraulic conductivity (K s) in desalinization with slaking and drying. Accordingly, a slaking test was carried out during February, 2009 for evaluating the effects of slaking and drying on K s, sodium adsorption ratio (SAR) and exchangeable sodium percentage (ESP) under various IWC. We prepared natural and air-dried soils of paddy field in Kojima Bay Polder, Japan to give different pre-drying, air-dried, and not dried (natural). The air-dried soils were resaturated. Each soil was well mixed, then dried to different initial moisture contents (60, 50, 40, 30, 20, and 10% by weight). The specimens were immersed into water in the pot for 24 h. The K s was measured, and cations in slaked and unslaked soils were analyzed. The K s was high under the water content below 30% in both the natural and the air-dried soils. But the effects were more pronounced in the natural soil. The air-dried soil showed far smaller K s than the natural soil. In outer solution, the highest SAR was noted at 30% in the natural and 30 and 20% in the air-dried soils. Significant decrease in ESP of the soils (slaked + unslaked) was also observed at the same water content. Lower water content was more effective in decreasing the soil ESP after desalinization from saline soil. The natural soil showed lower ESP and higher porosity, which was considered as a reason for higher K s of natural soil than that of air-dried soils. The results indicated that lower water content (10–30%) had no hazardous effect on K s by slaking and drying of soil.
Starting Page	221
Ending Page	228
Page Count	8
File Format	PDF
ISSN	16112490
Journal	Paddy and Water Environment
Volume Number	9
Issue Number	2
e-ISSN	16112504
Language	English
Publisher	Springer-Verlag
Publisher Date	2010-09-23
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Slaking Drying Moisture contents SAR ESP Saturated hydraulic conductivity Agriculture Soil Science & Conservation Ecotoxicology Geoecology/Natural Processes Waste Water Technology / Water Pollution Control / Water Management / Aquatic Pollution Hydrogeology
Content Type	Text
Resource Type	Article
Subject	Environmental Engineering Water Science and Technology Agronomy and Crop Science

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