Monitoring the quality of rivers and lakes is becoming more and more important as enviornmental concerns increase. A good
dissolved oxygen transmitter used properly is one of the important tools to use in this regard. You may want to look at http://www.ecy.wa.gov/programs/wq/plants/management/joysmanual/4oxygen.html for some useful techniques.
The following papers have been found based on your search criteria. Please select a paper from the list below to find out more information about this paper and to read an abstract if one has been made available.
Evaluation of water quality in passenger trains based on bacteriologic indicators
Hygienic aspects of the control and evaluation of the quality of water and soil in their contamination with viruses
