The purpose of this act is to authorize any county designated as an urban area under the provisions of Kan. Stat. Ann. § 19-2654, and amendments thereto, to prepare and adopt plans and land use regulations with multiple advisory bodies so as to bring unity, consistency and efficiency to the county’s planning efforts. Such plans and regulations shall be designed, in accordance with the present and future needs of the county and shall promote the public health, safety, morals, comfort, convenience, prosperity and general welfare and protect the land, air, water, natural resources and environment and encourage their use in a desirable manner and insure efficient expenditure of public funds and conserve and protect the values of property under the jurisdiction of the county.