Maryland's Approach to SB 227 and Flooding Management

Climate Change . "Heavy downpours are increasing nationally, especially over the last three to five decades. The largest increases are in the Midwest and Northeast. Increases in the frequency and intensity of extreme precipitation events are projected for all U.S. regions" - 2017 National Climate Assessment Use of IDF curves based on historic precipitation are likely to underestimate future precipitation - Chesapeake Stormwater Network Maryland Department of the Environment The volume of annual rainfall is expected to increase in the Chesapeake Bay Watershed by approximately 6.5% by 2055 - Chesapeake Bay Program 21 21

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