sectionFloodPlain = AddNewRoughnessSection(flowModel,"FloodPlain")
crs1 = GetItemByName(network.CrossSections, "prof_SW2815-SW2870_Bo")
crs2 = GetItemByName(network.CrossSections, "prof_D20060515-DP-295")
minY, maxY = GetMinYMaxYofCrossSectionProfile(crs1)
AddCrossSectionRoughness(flowModel, crs1, minY, maxY, sectionFloodPlain)
minY, maxY = GetMinYMaxYofCrossSectionProfile(crs2)
AddCrossSectionRoughness(flowModel, crs2, minY, maxY, sectionFloodPlain)