A New Model to Measure in Situ Saturated Hydraulic Conductivity Using Auger Hole with Flat Bottom
Model to measure in situ saturated hydraulic conductivity
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Keywords:
Auger hole method, elevated field bed, saturated hydraulic conductivity, subsurface drainage, waterlogged saline soilAbstract
The value of saturated hydraulic conductivity (Ks) are essentially required for the design of subsurface drainage and design of elevated field beds for reclamation and management of waterlogged saline as well as sodic soils. Hooghoudt (1936) model for Ks was modified in the present study to improve the estimate. A model for Ks measurement was also developed and compared with existing model. Ernst (1950) model is widely used for field application. The newly proposed model calculated the value of Ks as 0.248 m/day. Hooghoudt, modified Hooghoudt and Ernst model gave the values of Ks as 0.436 and 0.255 m/day. The Ks value obtained by newly developed model was closest to the value obtained by the Ernst model with deviation of 0.8% only. The new model is quite simple to understand with best accuracy hence recommended for field application.
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