Flood management plans are to guide activities in a watershed so that flood hazards are minimized, while preserving the biological values associated with the land and water resources. They will be developed for each watershed in accordance with Environment Article, Title 5, Subtitle 8, Annotated Code of Maryland, to attain all the following goals: Reduction of existing flood hazards; Prevention of future flood hazards; Adequate emergency preparedness; Preservation of the environmental qualities of the watershed; and Reduction of economic and social losses. A flood management plan shall contain, but not be limited to, the following: The limits of the watershed; An inventory of historic flood damage sites, including frequency and damage estimates; An inventory of areas of significant natural resource value as noted in existing state and local studies; An inventory of areas of historical and archeological value identified in existing state and local studies; A map or series of maps showing features of the watershed pertinent to the flood management plan; The relationship of the flood management plan to related programs in the watershed including the federal flood insurance program, the sediment control program, and the State water pollution and abatement program, and Program Open Space; The following information, based upon the ultimate development of the watershed and flood events up to and including the 100-year flood: A description of potential flood damages; An assessment of all available flood mitigation techniques, their costs and hydrologic impacts; The selected projects and techniques necessary to mitigate flood damages; and Any environmental, social, and economic implications of the proposed flood mitigation techniques; A schedule of expected implementation of all capital projects and other pertinent elements of the flood management plan; Identification of measures to be taken before, during, and immediately after a flood disaster including: Warning and evacuation for known flood hazard areas, and Post-disaster activities which would minimize both present and future damages; Any stormwater management requirements and techniques necessary to mitigate the adverse effects of land use changes on stream flows and flood frequencies; and Any rules, regulations, or ordinances necessary for implementation and hazard mitigation.