POLLUTION MONITORING

摘要

The effect of pollution in an aquatic mass is monitored. A living sessile organism (2) is placed in said aquatic mass and a series of first measurements of a first parameter of said organism (2) is carried out during a first time period. Each of said first measurements is recorded with an associated measurement of a second parameter to give a series of first data points (82c). A first envelope (80c) is determined and recorded with respect to said first parameter for said first data points (82c). A series of second measurements of said first parameter of said organism (2) is carried out during a second time period. Each of said second measurements is recorded with an associated measurement of a second parameter to give a series of second data points (86c). A second envelope (84c) is determined and recorded with respect to said first parameter for said second data points (86c). Said first and second envelopes (80c, 84c) are compared to determine the presence of pollution during said first or second time period. The first and second envelopes (80c, 84c) may be lower envelopes.

主权项

1. A method of monitoring the effect of pollution in an aquatic mass comprising the steps of:
placing a living sessile organism in said aquatic mass; carrying out a series of first measurements of a first parameter of said organism during a first time period; recording each of said first measurements with an associated measurement of a second parameter to give a series of first data points; determining and recording a first envelope with respect to said first parameter for said first data points; carrying out a series of second measurements of said first parameter of said organism during a second time period; recording each of said second measurements with an associated measurement of a second parameter to give a series of second data points; determining and recording a second envelope with respect to said first parameter for said second data points; and comparing said first and second envelopes to determine the presence of pollution during said first or second time period; wherein the first and second envelopes are lower envelopes.