Specific conductance is a measure of the ability of water to carry an electric current. This ability is proportional to the quantity of ions dissolved in the water. If you study this specific conductance hydrograph and compare it to the discharge hydrograph you should conclude that the concentration of dissolved ions is inversely proportional to the discharge of the stream. Read more…
A water temperature hydrograph shows how the temperature the stream’s water has changed over time. This water temperature hydrograph shows a daily cycle of temperature from solar heating. When the morning sun begins heating the land, stream and atmosphere the water temperature begins to increase. This temperature increase continues through the day and reaches a maximum near sunset. Read more…
This is one of the most frequently created hydrographs. It shows the change in discharge of a stream over time. The blue line on the hydrograph below shows how the discharge of the Tioga River changed between August 29 and September 5, 2004. A rainfall event in the late afternoon of August 30th produced about 1/4 inch of rain in the area of the gage. Read more…
Hydrographs are charts that display the change of a hydrologic variable over time. Here are several examples from the US Geological Survey’s gaging station on the Tioga River near Mansfield, Read more…
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Geology