Flooding Historicaly, flooding well as deaths on eight witt has certainly been one occasions and three has of the major resource serious personal in- pon management problems juries. Some locations of within the C.L.O.C.A. note which have been 1 area. Records indicate subject to flooding in- men that a total of 47 flood clude the Lakeview men events have been re- Park area, and the Kin strie ported in the local area Street - Oshawa CreeI flood since 1850. Presumably, area in Oshawa; the 2. there may have -been Port Whitby area and tion many more events locations along Dundas which for some reason Street in Whitby, King. or another were not in- Street in Bowmanville 3. cluded in newspaper ac- at Bowmanville Creek, fro counts or recorded in and the Tyrone and another manner. Pro- Hampton Millareas. 4.1 perty damage has been The Authority's exist- mon frequently reported, as ing program for dealing genc Floodplain Management In uruer to minimize future flooding pro- blems, it is necessary to determine the location of flood-prone areas and to take measures which discourage the develop- ment and habitation of those- areas. If people are'ot living and work- ing in the floodplain, there is less, chance of injury or death during a flood event. Similarly, the fewer buildings con- structed in floodplain locations, the less is the amount of property damage which cean oc- Acqt cur during a flood. Floodplain mapping has been prepared,by the Authority for ail of the streams within the watershed.vtThe mapping delineates the floodplain as it would exist if 'a' Regional Storm (a storm of the intensity of Hurricane Hazel) were centred on the watershed. This is in accordance with the provincialîy accepted standard for the de- lineation of floodplains in this area of the pro- vince. and ;h flooding probl four major c ents: Floodplain mana nt through deve nt control and ction of the use dplain areas; Floodland acqu Studies and cap! ects which prov d benefits; Flood warnin itoring, and em y planning. e mechanisms us controlling floc idevelopment a rio Regulation 16 ider the Conserv Authorities A h requires Autho roval for any pr floodplain ,<Col tion, for filling guIated area, ar proposed watei e alterations; an various plannin and use contr ,dures which ai ,mented throug, cal rnunicipalitieç Th for plain Ontar 80 uni tion whicl ty ap posecà struci: a reg for p cours< the v and . procec impIei the loc ems om- âge- lop- re- of isi- ital ide er- ed d- ir- ia- in, id ri- id ition of Floodlands Public acquisition of floodlands is probably the most effective means of reducing flood damages and hazards. Removing the, property from private ownership ensures that use of the floodplain will be minimized and future deveiopment will be only of a type that will be compatible with the hazard (e.g. passive recreation). Acquisition by the Authority takes e place on a limited basis in selected areas as outlined by the 20 year acquisition plan. Acquisition only occurs as properties become available and as yearly funding permîts. These properties are then operated as conservation areas where the primary purpose is to conserve the land and water resources. Opportunities for passive recreation may be provided.. This project undertaken by the Authority provides erosion control benefits and aiflood control by widening the channe capacity. Flood Control Example of damage to a road resulting from the flood of March 21, 1980. Studies and apital Pro Numerous studies have been watershe undertaken over the years which damage investiîgated floodig and ý-erosion greatest. problems at selecteklocations, and As a r recommended policies and capital projects works 'to alleviate these problems. benefits Areas which have been studied various include, the portions of the' Pringle planned Creek, Oshawa Creek, Goodman addition, Creek, Harmony Creek, and managenr Farewell Creek. The st 'udies adopted fi generally have focused on the more sections o urbanized sections of these sections o Flood Warning, Monitoring and Emergency Plain When an actual flood ficient monitoring of is expected, the Authori- stream levels occur, a ty's main function is to flood forecasting net- warn the local munici- work is currently being palities and other rele- set up in the watershed. vant parties about the This will ultimately impending flood, and consist of three flood monitor stream levels forecast stations, which so that up to date in- will provide instan- formation can be pro- taneous water level in- vided to those who' formation whenever it might be effected and to is required, through a those involved in the telephone hook-up, and emergency operations. a number of manual The Authority has stream level gauges prepared a Flood Warn- positioned at strategic ing and Contingency locations throughout the Plan in order to clearly watershed. organize the response of In summary, floodin its staff to flood events. n s y contod is a FurtermretheAu:and, its control is a Furthermore, the Au- major focus of the thority has encouraged Author foe ofimaey local municipalities to Auhority. The primary prepare their own flood goals and objectives contingency plans in with regard to this pro- od e y prpasthem-blemarea can be sum- selves fopretre ithem- marized through the mentation of any eimpe- following statements:, gency measures which "To influence land use may be required. activities, maintain In order that more ef- the state of public jects eds where the potential for and the safety risk are sult of the studies, capital which rovideflood control have been undertaken at locations and more are for future years. In special "floodplain aent policies" have been or the West Corbett Creek, Df the Goodman Creek, and. )f the Oshawa Creek. awareness, and ac- quire selected hazard lands in order to mini- mize the risk, to life and damages to Pro- perty from flooding and erosion hazards, and in order to ensure that the degree of floodine is not aggra- vateda "To maintain a state of readiness, to in- form the publie, and to stimulate a co- ordinated municipal response to deawith flood emergencies. " "To maintain and, where possible, en- hance the natural functioning of head- water areas, ground- water recharge areas and natural water storage areas,' and to consider the establish- ment of artificiai faci- lities for water stor- age and recharge."