data water on the web
about us understanding data curricula resources
what's new at wow site map
Chester Creek
data visualization tools
in-stream trends/summaries
real time stream data
stream context
 
 
  Chester Creek Storm Graphs


What does the graph mean? Look at one of the rain events (blue bars). After each rain event:

  • Stream depth increases, due to water running off the surrounding watershed. Stream depth will increase more in urbanized watersheds (and will increase more quickly) because water cannot infiltrate into soil covered with roads and parking lots.
  • Turbidity increases. Sediments are washed from the watershed into the stream. Loose sediments from construction projects, roads, parking lots, and un-vegetated soils are carried into the streams.
  • Conductivity (salt concentration) decreases. This is because salts in the streams are diluted because the large volume of water entering the stream during the storm dilutes the salts.


What does the graph mean?
See the explanation of the previous graph.




What does the graph mean? Look at the snow event (blue bar). After the snow event:

  • Stream depth remains about the same. 2.6 inches of snow is equivalent to only 0.2 inches of water. Most of this "sticks" to the ground and melts slowly, allowing it to infiltrate into the surrounding soil.
  • Turbidity remains low. Since snow "sticks" to the ground, and melts slowly, it doesn't carry much sediment to the stream.
  • Conductivity (salt concentration) increases. The salt that the city puts on roads to make driving easier also ends up in the streams.


back to top
   
Water on the Web
about us  :  understanding  :  data  :  curricula  :  resources
what’s new  :  site search  :  site map  :  contact us

http://www.waterontheweb.org/data/chester/trends/storm.html
date last updated: Wednesday March 03 2004