Page 209 - parks-master-plan

D E V E L O P M E N T

C A P A B I L I T I E S

A N D

C O N S T R A I N T S

A S S E S S M E N T

STREAM BUFFERS

Source:

Streams data: Dublin GIS department

Watershed data: Ohio Department of Natural Resources. Available online from: http://www.ohiodnr.com/gims/

Supplemental stream setback guidelines: N.R.C.S.

Description:

Identification of designated stream setbacks with associated buffers.

Intent:

To identify appropriate stream buffers throughout the study bounds to assist in the protection of Dublin’s water resources as well as to identify potential wildlife corridors and a means to reconnect the highly fragmented forested lands throughout the study bounds. (See Forested Landcover)

Analysis Summary:

The streams data received from the city of Dublin was used as the base for this data set. The streams data were compared with the watershed data obtained from O.D.N.R. to determine the approximate watershed size of the major streams in Dublin.

Upon the determination of watershed size, a setback was added to each stream based on the following guideline provided by the N.R.C.S. This guideline was recently cooperatively developed by O.D.N.R., O.E.P.A. and the N.R.C.S. The setback guideline is determined by: [ 147(Drainage Area)^.38 ].

The above stream setback is considered to be the minimum for any stream. To assure that proper resource protection is achieved or exceeded, and to assist in the development of additional forested landcover, an additional buffer was added to this stream setback in the amount of 80’. This buffer allowed for a transition of values from high (adjacent adjacent to the stream) to low, as the distance from the stream increased.

Resultant Data:

Continuous data set

High Values Mid Values Low Values