Effect of Water Quality on Hydraulic Properties of the Niigata Smectitic and Tottori Kaolinitic Soils
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Accession number;03A0395287
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| Title;Effect of Water Quality on Hydraulic Properties of the Niigata Smectitic and Tottori Kaolinitic Soils |
| Author;
ARAI M
(Tottori Univ., Tottori, Jpn)
KEREN R
(Inst. Soils And Water, Bet Dagan, Isr)
YAMAMOTO T
(Tottori Univ., Tottori, Jpn)
INOUE M
(Tottori Univ., Tottori, Jpn)
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Journal Title;Transactions of the Japanese Society of Irrigation, Drainage and Reclamation Engineering
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Journal Code:S0345A
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ISSN:0387-2335
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VOL.;NO.224;PAGE.151-157(2003)
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| Figure&Table&Reference;FIG.6, TBL.2, REF.29 |
| Pub. Country;Japan |
| Language;English |
| Abstract;The effect of electrolyte concentration of percolating solution on hydraulic conductivity (HC) and infiltration rate (IR) of the Niigata smectitic and Tottori kaolinitic soils at Exchangeable Sodium Percentage (ESP) 0 and 30 was studied using soil columns and a rainfall simulator. The HC of the Niigata smectitic soil at ESP 0 reduced significantly with percolating distilled water (DW), whereas a decrease in HC at ESP 30 was observed with the 10molc m-3 solution. The HC of the Tottri kaolinitic soil at ESP 30 dropped at the electrolyte concentration equal to or below the Flocculation Value (FV) of 5molc m-3. These results indicate that even for non-swelling clay soils a severe reduction in HC can be observed when the soil with a relatively high ESP level is exposed to solution at electrolyte concentration below the FV due to clogging of conducting pores by dispersed clay. The steady-state IR of the Niigata smectitic soil exposed to DW rainfall was strongly affected by the ESP, a much smaller effect of the ESP was observed for the Tottori kaolinitic soil. This was probably due to the fact that the aggregates were more stable than those of the Niigata smectitic soil at ESP 30. The lower steady-state IR of both soils at the higher ESP can be attributed to the higher FV of both soils at ESP 30. The ESP effect on steady-state IR was greater than that of HC when both soils were exposed to DW rainfall. This difference is probably due to the disintegration of soil aggregates and their compaction on soil surface caused by the impact of the raindrops. (author abst.) |
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