|
|
|
|
| |||||||||
|
|
| |||||||||
|
|
| |||||||||
Water
Resources – Channel Study
The main stream channels within
the Elm Creek watershed have been impaired by land development and communities
are faced with a growing number of costly stream repair projects and loss of
natural resources. The Second Generation
Elm Creek Watershed Management Plan adopted by the Commissio The Elm Creek Channel Study
recommends revised management practices to provide for more stable conditions
for Elm Creek, including The Channel Study was comprised
of the following: 1. Site
survey of 45 channel locations. 2. Hydraulic
analysis and determination of bankfull channel
capacity (considered to be the stable condition) at the surveyed locations. 3. Hydrologic
modeling of current watershed to estimate the frequency of bankfull
flow at each location. 4. Assessment
and recommendations of watershed management practices to reduce the input of
stream stability based on future conditions as the watershed continues to
develop. The Channel Study stated the
following conclusions: 1. Many
stream channels have been impacted by development. 2. The
current watershed management requirements have not been adequate to reduce flow
from development to provide for a stable channel. 3. Additional
watershed management requirements are needed to address channel stability. 4. Extended
detention and reduction of surface water runoff should be implemented by the
Commission to maximize channel protection.
Also, low impact design techniques and infiltration practices are
encouraged wherever possible to reduce the need for extended detention. The Channel Study has been
broken down into four parts and appendices for ease of download: |
Maintained by Judie Anderson's Secretarial Service, Inc. Powered by Alacri! |
