Maryland's Approach to SB 227 and Flooding Management
Regulatory Changes: Environmental Site Design (ESD)
•
•
.•
ESD is required by law [Env. Art. §4-203(b)(2)]
Considering updates to ESD to Maximum Extent practicable (MEP)
to capture increased runoff volumes based on future climate
projections
Goal is to capture, treat, and slowly release sufficient runoff to
mimic natural conditions and address the Rev, WQv, and Cpv
Was derived from the median one year 24-hour storm, or 2.7" (Cpv)
Climate change projections do not include one year storms. The
projected change for larger design storms (e.g., 2, 5, 10 yr) is 10%
and the average rainfall volume is increasing by 6.5%
Using these projections, ESD should change from 2.7" to 3.0"
The ESD minimum would still be 1.0 inch
2000 MARYLAND
Maryland
Department of
the Environment
STORMWATER DESIGN MANUAL
VOLUMES I & II
PREPARED BY:
CENTER FOR
0000
Tun, Munc
AND THE
MARYLAND DEPARTMENT OF TE ENVIRONMENT
WATER MANAGEMENT ADMINISTRATION
MDE 2500 BRNING HIGHWAY BALTIMORE MARYLAND 21224
(410) 631-3543 1-800-633-6101 hrp://www.mde.state.md.us
48View entire presentation