Armfield Engineering Education
IRRIGATION WATER MANAGEMENT
FEL4 Soil Moisture Suction Sand Table - Issue (Provisional)
For the derivation of soil moisture characteristic curves.
ORDERING SPECIFICATION
Soil Moisture Suction Sand Table comprising:
• sand table, 300mm diameter
• sliding suction control chamber giving tension range 0-800mm of water (using sandy-loam)
• complete with three soil sample retaining rings (80mm diameter), instructions and manual.
Instructional Capabilities
As a result of using this equipment students will be able to:
> understand the principles of water retentivity in terms of soil suction
> understand the relationship between water retentivity and soil
> derive soil moisture characteristic curves for a variety of soils.
Description
The Armfield equipment consists of a free-standing circular tank filled with saturated sand (not supplied). Equilibrated soil samples placed on the sand are then subjected to a known variable suction range of 0- 800mm of water. The suction is applied by means of a buried porous pipe and an associated sliding control chamber. In order to maintain the suction an uninterrupted low volume water supply is required.
A lightweight cover is provided to prevent evaporative water loss during experiments and the table is large enough to permit the simultaneous evaluation of several samples.
Requirements
Water Supply:
Connection to a permanent cold water supply
Drain (cold water)
Suitable laboratory drain required
Shipping specification
Volume 0.7m3
Gross weight: 100kg
Overall dimensions
Height: 1.3m
Width: 0.4m
Depth: 0.5m
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