Baccharis Consulting LLC

Water Inundation in Naamans Creek Watershed, Delaware (2002-2017)

 

Picture of Naamans Creek

    Naamans Creek at Woods Haven Kruse Park. The creek is above tidal influence here.

 

Discussion of Naamans Creek Watershed

Naamans Creek is located at the uppermost part of the Delaware River in Delaware.  Part of the watershed is located in Pennsylvania.  The tidal sections of the creek are heavily industrial and bulkheaded, but there is a small section of the main stem that is more natural.  More information on Naamans Creek can be found at this link.

This watershed has a very small exposure to tidal water.  It is subjected to the effects of a riverine watershed.  This means that precipitation events have an outsize influence on the inundation numbers.  For instance, you can have a heavy rainfall event in the upper Delaware watershed, which will then flow into the main stem of the Delaware River causing it to rise.  There is not enough area for the water to spread out.  In these watersheds (riverine) it is best to look at the trends rather than the actual numbers.

Naamans Creek Water Inundation

(2002-2017)

Table 1. Naamans Creek Watershed Tidal Water (2002-2017) in acres
Year Estuarine Tidal Riverine Water
2002 6.93
2007 7.35
2012 7.43
2017 8.42

*Estuarine Tidal Riverine Water is water that has salinity < 0.5 ppt.

Table 1 shows that the amount of tidal water in the watershed has consistently risen since 2002 with the largest increase in the 2012-2017 period.

Table 2.  Average Rate of Naamans Creek Watershed Tidal Water Inundation

(2002-2017) in acres/year

2002-2007 0.08
2007-2012 0.02
2012-2017 0.2

Table 2 shows that the water inundation rate slowed in the 2007-2012 period, but sped up above the 2002-2007 period in between 2012-2017.  The 2007-2012 slowdown has been seen in other watersheds in Delaware.

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