Which monitoring activity targets nutrients such as nitrogen and phosphorus?

• A. Nutrient Monitoring
• B. BOD Testing
• C. Turbidity Measurement
• D. Salinity Monitoring

Answer: (A)

Monitoring nutrients like nitrogen and phosphorus focuses on tracking key plant nutrients in water, because these elements drive algal growth and can lead to oxygen problems in aquatic systems. This type of monitoring is specifically aimed at measuring the levels of nitrogen species (such as nitrate, nitrite, and ammonium) and phosphorus (often as orthophosphate) to assess eutrophication risk, identify sources of nutrient input, and evaluate management actions. Other monitoring targets, like BOD testing, look at how much oxygen will be consumed by decomposing organic matter, not nutrient levels; turbidity measures how cloudy the water is due to suspended solids or plankton, not nutrient content; and salinity monitoring checks salt concentration, which is unrelated to nutrient loads.