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Copy of chapter 12 in: H.P.Ritzema (Ed.), Drainage Principles and Applications,
ILRI Publication 16, second revised edition, 1994, Wageningen, The Netherlands

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12. Determining the saturated hydraulic conductivity of soils          TABLE OF CONTENTS   12.1 Introduction 12.2 Definitions 12.3 Variability of hydraulic conductivity         12.3.1.Introduction         12.3.2 Variability within soil layers         12.3.3. Variability between soil layers         12.3.4. Seasonal variability and time trend         12.3.5. Soil salinity, sodicity, and acidity         12.3.6. Geo-morphology 12.4 Drainage conditions and hydraulic conductivity         12.4.1. Introduction         12.4.2. Unconfined aquifers         12.4.3. Semi-confined aquifers         12.4.4. Land slope         12.4.5. Effective soil depth 12.5 Review of the methods of determination         12.5.1. Introduction         12.5.2. Correlation methods         12.5.3. Hydraulic laboratory methods         12.5.4. Small-scale in-situ methods         12.5.5. Large-scale in-situ methods 12.6 Examples of small-scale in-situ methods         12.6.1. The auger-hole method         12.6.2. Inversed auger-hole method 12.7 Examples of methods using parallel drains         12.7.1. Introduction         12.7.2. Procedures of analysis         12.7.3. Drains with entrance resistance, deep soil         12.7.4. Drains with entrance resistance, shallow soil         12.7.5. Ideal drains, medium soil depth References

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