Friday, October 19, 2012

Wissahickon Creek Flood Study Continues

One of the most flood prone areas in Southeastern Pennsylvania is the Wissahickon Creek watershed of Lower Montgomery County.  The watershed is outlined on the left in the tan shading, with the most flood prone portions specifically in the Ambler, Fort Washington, and Upper Dublin corridor, which has been the center for significant flooding problems over the last several years.

Recent flood events include the remnants of Tropical Storm Allison in 2001, which washed out the R5 bridge at Fort Washington, and reared its head again with Irene and Lee last year.  A combination of topography, located just above the Fall Line, and urbanization have helped make this area one of the most flood prone in the area.  The topography aspect contributes due to the region picking up more rain in heavier rainfall events than the city due to the extra elevation helping squeeze out additional moisture due to terrain lift.

A meeting was held on Wednesday night in Ambler featuring Temple University researchers and public officials from Whitpain and Upper Dublin Townships, as well as Ambler borough, to talk about the issues that are going on in the watershed with flooding, damage, and the call for action to get better storm runoff management in these areas.   Temple University is spearheading the development of a storm water plan for the three municipalities, a process that began in 2010 before the Irene and Lee combination of flooding in late August and early September of 2011.  

A wordpress blog has been set up to talk about the developing task force and has more information, including when future meetings will be held in the Ambler area on this study.