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Increasing global temperatures and changing weather patterns
indicate that climate change is with us and impacting
on our every day lives. The coastal flooding at Towyn
in 1990 and the fluvial flooding in Llandudno Junction
in 1993 and Boscastle in 2004 illustrate the increasing
frequency of significant storm events. Climate change
has important implications for the assessment of flood
risk, the consequences of flooding and the design of
flood defences. The United Kingdom Climate Impacts Programme(UKCIP)
has recommended that an allowance is made for climate
change in assessing flood risk.
Planning policy has evolved to reflect the risk posed
by development in flood prone areas with the issue of
guidance documents. In England, PPG25: Development and
Flood Risk, July 2001, is shortly to be revised with
Planning Policy Statement 25 (PPS25). This will emphasise
the need to consider flood risk as early as possible
in the planning process while strengthening guidance
to include Flood Risk Assessments (FRA) at all levels
during development design. A similar document from the
Welsh Assembly Government, Technical Advice Note 15 (TAN15),
July 2004, provides development guidance on a similar
theme.
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| Egniol’s chartered civil engineers and hydrologists
have undertaken many flood risk studies using TAN15 and
PPG25 and can offer early advice on flood susceptibility
and minimizing risk. Early contact is essential as we
may be able to reduce flood risk by engineering advice
appropriate to the development.
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Sustainable
Urban Drainage Systems (SUDS)
Today’s emphasis is on source control to
help reduce the rate and quantity of rainfall run
off generated by brownfield and new developments.
Employing these techniques can greatly reduce the
impact on receiving surface water sewers and watercourses
where there are local capacity problems. Egniol
can advise on permeable pavements, soakaway systems,
swales, attenuation and slow release lagoons.
Hydrological and Sewerage Design Studies
We can assess the flows in watercourses and undertake
flood studies using either the Flood Studies
Report (FSR) or the Flood Estimation Handbook
(FEH). With our Micro Drainage suite of software
we can also undertake complex sewer modeling
and design of new works for adoption by water
companies under Section 104 of the Water Industry
Act,1991.
Topographical Surveying
Egniol can produce in house topographical surveys
using total station and GPS to support our
flood risk assessments. |
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Egniol Limited | Tre Felin | Bangor | Gwynedd | North Wales | LL57 4LH | Phone 01248 355996 | Fax 01248 371996 |
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