What function do nozzles serve in subsurface injection?

Nozzles in subsurface injection primarily serve the function of metering the flow of herbicide or other treatment materials into the water. This precise control ensures that the correct amount of chemical is delivered at the right rate, which is crucial for effective aquatic pest control. The metering process helps to achieve uniform distribution and prevents over-application, which can lead to adverse environmental impacts and decreased efficacy of the treatment.

By regulating the flow, nozzles enable operators to adapt to varying conditions in the aquatic environment, such as water currents and depth, allowing for more effective and efficient treatment. This level of control is integral to targeting specific areas and minimizing the risk of non-target effects often associated with improper application rates.