Sampling strategy

Sampling strategy - context
Environmental sampling
Spatial variability
Development of a sampling scheme
Spatial variability -> sampling scheme (1)
Spatial variability -> sampling scheme (2)
Temporal variability
Sampling and storage equipment
Potential sources of analyte losses
Sample contamination
End of lesson

Handout: Development of a sampling scheme

Objective:

Determine the spread of herbicide atrazine in the surface water of Lake Greifensee , Switzerland.

Question 1: Which sampling scheme would you use to test whether the spatial distribution in the lake surface water (top 50 cm) is homogeneous? Mark 15 sampling locations with a cross x
Question 2: An illegal pesticide has been detected in the water of lake Greifensee near the city of Maur. Which sampling scheme on the lake would you use to test whether the illegal pesticide originated from agricultural field A? Mark 15 sampling locations with a circle O.