In this section, the analysis of four performance indicators namely: i) watertable
fluctuations, ii) groundwater quality, iii) soil (surface and profile) salinity, and iv) cropping intensity are discussed.
The model predicted that the watertable
in the Subdivision would go down to 6.78 meters from 5.78 meters, thus, falling by one meter from the current level.
Before land clearance, most watertables
were deep below the surface, and the undissolved salt was immobile in the soil.
Dense shelterbelts (coniferous trees, thick shrubs such as carragana) protect the soil from drying out in winter by keeping snow on the ground, which raises the watertable
and reduces the need to irrigate during summer.
Measurements were made of existing septic tanks and field lines to determine depth, linear footage, and separation from the wet season watertable
, surface waters, wells, and other features Homeowners provided additional data by questionnaire regarding the age of their septic tank systems, number of household occupants, repairs to their septic system, and plumbing problems.
Examples include: (a) contamination of land (soil or water) through dumping or disposal of hazardous wastes on that land; (b) contamination of groundwater underlying agricultural land where chemicals have leached through the soil to the watertable
; and (c) contamination of soils in urban areas from industrial "fallout" such as air pollutants that settle quickly after emission or crumbling lead paint.
To inaugurate the second space at the new gallery space, Wilson produced watertable
, 1994, a work that builds on both of these earlier pieces.
salty irrigation water or dissolved fertiliser salts), or the rising of salty water from an underlying watertable
. This connectivity is why it is crucial to concurrently monitor salinity and sodicity at multiple depths in the soil, although this is rarely considered.
Inflow and out flow approach change in watertable
depth approach and a computer model (Surfer) approach.
This study adopted observed watertable
This suggests that the adjacent native vegetation is affording some protection, thus slowing rates of watertable
- The depth of the watertable
and the circulation regime of groundwater are responsible for the capillary discharge in the playa surface and the accumulation of surface saline crusts.