12. Determining the saturated hydraulic conductivity of
This paper is about the characteristics of hydraulic conductivity in soils. Thereafter it discusses how drainage conditions are influence by the conductivity. A classification is given of methods to measure the hydraulic conductivity and each method is explained in detail.
TABLE OF CONTENTS
12.3 Variability of hydraulic conductivity
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
12.4 Drainage conditions and hydraulic conductivity
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
12.5.2. 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
12.7.2. 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
The table shows the methods for determining the
hydraulic conductivity of soils.
The below-watertable-methods include the piezometer and augerhole methods.
Above the watertable the infiltrometer is used.
The correlation methods are based on pore size and grain size distributions of the soil. In addition the soil texture plays a role.
Amongst the large scale methods features the pumping test.