These hydrographs are from some rivers that experienced
flooding from the heavy rains associated with Ida. Water levels in most of
the river systems in the Northeast were still high due to previous rainfall
from tropical systems earlier in August. The color code helps identify the
intensity of flooding or potential flooding along the river:
The color code helps identify the intensity of flooding or potential
flooding along the river:
- Near Flood Stage (yellow) - flooding becomes a
concern. River/stream is approaching or is forecast to approach the
gage height (flood stage) where flooding is defined to begin. Flood
stage is an established gage height for a given location at which a
rise in water surface level begins to create a hazard to lives,
property, or commerce.
- Minor Flooding (orange) - minimal or no property
damage, but possibly some public threat.
- Moderate Flooding (red) - some inundation of
structures and roads near the stream/river. Some evacuations of people
and/or transfer of property to higher elevations.
- Major Flooding (violet) - extensive inundation of
structures and roads. Significant evacuations of people and/or transfer
of property to higher elevations.