The purpose of this ordinance is to promote the health, safety, convenience, order, prosperity and general welfare of the present and future inhabitants of the city; and to assure the development of the city in accordance with the land use and thoroughfare plan as adopted, and as amended from time to time; to protect the population from the danger and inconvenience of traffic congestion; to prevent overcrowding of the land and the undue concentration of population; to facilitate the adequate provision of transportation, water, sewerage, schools, recreation and other public requirements; to regulate with reasonable consideration the character of existing and future uses of the land in order to promote desirable living conditions and neighborhood stability, protect property against blight and depreciation, secure economy in governmental expenditures, and protect against floods and other natural hazards.