Groundwater trendsWest Midlands Crop Updates 2014
Groundwater trends in the West Midlands
Russell Speed
Supporting your success
• Brief overview of Geology of the Perth Basin (West Midlands)
• Brief overview of the hydrogeology and hydrological concepts
• Groundwater data and trends
• Wandawallah transect
Supporting your success
Geology
Northern Agricultural Region
Multiple saturated zones
DN5D current rising trend = 0.13 m/yr
DN1OB current rising trend = 0.05 m/yr
WW8D current rising trend = 0.32 m/yr
BD1OB current rising trend = 0.19 m/yr
Groundwater quality = 3000 mS/m (1/2 seawater)
06DT01D current rising trend = 0.21 m/yr
DP6 current rising trend = 0.18 m/yr
DP12 current rising trend = 0.18 m/yr
DP13 current rising trend = 0.06 m/yr
Groundwater monitoring
Northern Agricultural Region
DAFWA
Supporting your success
3640 mS/m (over half seawater)
DP19 current declining trend = 0.15 m/yr
DP21 current declining trend = 0.28 m/yr
DP22OB declining 0.09 m/yr DP22D rising 0.40 m/yr
Summary
• Rising groundwater trends throughout the Dandaragan Plateau Hydrozone (except under pine plantations)
• High salinity risk assessment, especially where watertable is shallow
• Wandawallah Lake is an example of dryland salinity in the West Midlands
Thank youVisit agric.wa.gov.au
Supporting your success