Science

The USSG computes streamflow several different ways at a streamgage. One very common way is to build a stage-discharge relation that computes a discharge (flow) based on a corresponding stage (elevation of the water-surface). This method relies on a hydraulic feature in the river or stream to control that relationship. The control can be a concrete weir, or natural rock outcrop or riffle. ​

Major aquifers in New Jersey consist of regionally extensive areas where the geologic formation or group of formations provide sufficient quantity of groundwater to wells for potable water supply.

Did you know? Earthquakes can affect groundwater levels? We often see a response to large (and sometimes not so large) earthquakes in groundwater levels in wells. The USGS maintains a network of wells for monitoring various things like natural variability in water levels and response to pumping and climate change across the U.S.