Chapter 20.05 FLOODPLAIN MANAGEMENT This chapter is included in your selections. Sections: 20.05.005 Statutory authorization. 20.05.010 Purpose. 20.05.020 Definitions. 20.05.030 Reference to other codes. 20.05.035 Interpretation – Disclaimer of liability. 20.05.040 Implementation. 20.05.050 Flood hazard district. 20.05.060 Regulations.