In addition the most representative sampling locations are often at a distance from the shore or bank increasing the logistic complexity .
Freshwaters are surprisingly difficult to sample because they are rarely homogeneous and their quality varies during the day and during the year .
In addition the most representative sampling locations are often at a distance from the shore or bank increasing the logistic complexity .
Freshwaters are surprisingly difficult to sample because they are rarely homogeneous and their quality varies during the day and during the year .