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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.
Read more about how summer storms in urban
areas can impact streams.
(coming soon!)
View this graph for Chester
Creek or Kingsbury
Creek 
What does the
graph mean? See the explanation
of the previous graph.
Read more about how summer storms
in urban areas can impact streams.
(coming soon!)
View this graph for Chester
Creek or Kingsbury
Creek
 |
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.
Read more about how winter storms in urban areas
can impact streams. (coming
soon!)
View this graph for Chester
Creek or Kingsbury
Creek
View this graph for Chester
Creek or Kingsbury
Creek
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