The effect of microorganisms, salinity and turbidity on hydraulic conductivity of irrigation channel soil

  title={The effect of microorganisms, salinity and turbidity on hydraulic conductivity of irrigation channel soil},
  author={Santo Ragusa and De Zoysa and Pichu Rengasamy},
  journal={Irrigation Science},
The introduction of polysaccharide producing benthic algae and bacteria could provide a low cost technique for seepage control in irrigation channels. The ability of algae and bacteria to produce polysaccharides proved to be successful in reducing the hydraulic conductivity of irrigation channel soil. Hydraulic conductivity was reduced to less than 22% of its original value within a month of inoculating soil columns with algae. Chlorophyll and polysaccharide concentrations in irrigation channel… 

Biological, chemical and physical factors influencing the seasonal change of polysaccharide concentration in irrigation-channel sediment

Correlations between polysaccharide concentration and chlorophyll a (and algal biomass) further indicate the importance of benthic algae for poly Saccharide production and the effect of clogging can be maximized by exposing the channel bed to direct sunlight during non-irrigation period (winter).

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A scheme is proposed, together with a procedure suitable for routine laboratory use, for the prediction of dispersive behaviour of surface layers of red-brown earths and their classification into one

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An attempt was made to study the physical and biological clogging during artificial recharge with an experimental model that simulates the artificial recharging practice by considering factors such

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SUMMARY Equivalent salt solution series have been previously defined as solutions with combinations of sodium absorption ratio (SAR) and electrolyte concentration (Ec) producing the same extent of

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Colorimetric Method for Determination of Sugars and Related Substances

Simple sugars, oligosaccharides, polysaccharides, and their derivatives, including the methyl ethers with free or potentially free reducing groups, give an orangeyellow color w-hen treated with


土に長期間連続的に水が浸透すると透水性が著しく低 下する.その原因として,土壌微生物が重要な働きをし ていることを突き止めたのが,本稿で紹介する Allison の論文(Allison,1947)である.すなわち,土壌微生物 とその代謝生成物質が土壌の間隙を目詰まりするクロッ ギング現象,あるいはバイオクロッギング現象と呼ばれ る現象の初期の研究である.