METHOD FOR MEASURING SALINITY AND WATER TEMPERATURE OF BRACKISH WATER REGION AND APPARATUS THEREFOR

摘要

PROBLEM TO BE SOLVED: To measure a salinity and a water temperature of a brackish water region in a short time by a relatively simple operation by setting to the brackish water region a cable connecting a plurality of probes each comprising a temperature- measuring means and a salinity-measuring means and processing to calculate measured results via the cable. SOLUTION: A salt water and a fresh water constituting a brackish water region forms a double-layer structure because of a difference in density. The salt water of a higher density forms a lower layer and the fresh water of a lower density forms an upper layer. In order to measure a temperature and a salinity of each layer and the vicinity of a boundary, a thermistor sensor as a temperature-measuring means and a sensor comprising an electromagnetic induction cell for measuring a conductivity as a salinity-measuring means are combined as a probe. A plurality of the probes are mounted to a cable to measure the temperature and salinity. Measured results are input to a calculating device via the cable and processed to be summed. When the cable with many sensors mounted simultaneously is set to a lake bottom or river bed of the brackish water region, a change in salinity or water temperature in horizontal and vertical directions can be observed.