NSWC/WOL/TR 75-3 5 



As theory and experimental data both indicate temperature 

 changes produced in water by explosions are entirely negligible after 

 a few minutes have elapsed. There seems to be no justification for 

 attempting to measure this effect for the purpose of monitoring a 

 test. However, temperature, along with conductivity and salinity, are 

 often needed data for water quality monitoring. 



Conductivity is an important water quality test. Also the 

 conductivity and temperature measurements can be used to estimate 

 total dissolved solids. When measuring dissolved oxygen, it is 

 necessary to correct for the salts dissolved in the water. The 

 salinity measurement provides the data necessary to make this 

 correction and is of particular importance in coasted areas. 



To facilitate in-situ pollution studies YSI has developed the 

 Model 33 S-C-T Meter ($250) and Probe ($45) for direct measurement of 

 salinity, conductivity, and temperature. The meter is operated as 

 follows : 



Estimate total dissolved solids by dropping the unbreakable 

 plastic probe in water, switching to the appropriate conductivity 

 scale and reading the answer directly from to 50,000 mhos/cm. 

 Switch to the temperature scale and read temperature from -2° to 

 +50°C (accuracy: +0.1°C at -2°C and +0.6°C at 45°C) . Measure 

 salinity as in estuarian environment by dialing the water temperature 

 and switching to the salinity scale for direct, temperature 

 compensated salinity readings from to 40% e (accuracy : +0.9%oat 40% 

 and + 0.7% o at 20%) . 



V 



CONCLUSIONS AND RECOMMENDATIONS 



It is desirable to cover every parameter in a water quality 

 monitoring program, if possible. Accurate assessment of the water 

 quality can be conveniently made if sufficient data have been obtained, 

 However, very often complete coverage of the monitoring parameters 

 cannot be achieved because of lack of time, personnel, or funding. 

 Therefore, priority must be established on the parameters needed to 

 satisfy the minimum requirement of the monitoring program and on the 

 number of measurements necessary for a reliable quantitative estimate. 



In the chemical monitoring program of explosion products several 

 basic parameters are recommended: 



60 



