The Planning System and Flood Risk Management - Offaly County ...

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46TermsDefinitionPlanning GuidelinesEnvironmental ImpactAssessment (EIA)Estuarial floodingFlash FloodFlooding(or inundation)Flood Relief Schemes (FRS)Flood defenceFlood-detention reservoirsFlooding from artificialdrainage systemsFlood hazardPursuant to EU Directive 85/337/EEC (asamended in 1997), EIA is a legislative procedureused for identifying the environmental effects ofdevelopment projects to be applied to theassessment of the environmental effects ofcertain public and private projects which arelikely to have significant effects on theenvironment.Flooding from an estuary, where water levelmay be influenced by both river flows and tidalconditions, with the latter usually beingdominant.A flash flood is a rapid flooding of an area ofland as a result of intense or extreme rainfallevents or failure of infrastructure designed tostore or carry water or protect against floodingand is distinguished from general flooding bythe sudden onset.Flooding is the overflowing of water onto landthat is normally dry. It may be caused byovertopping or breach of banks or defences,inadequate or slow drainage of rainfall,underlying groundwater levels or blockeddrains and sewers. It presents a risk only whenpeople, human assets and ecosystems arepresent in the areas that floods.A scheme designed to reduce the risk of floodingat a specific location.A man-made structure (e.g. embankment, bund,sluice gate, reservoir or barrier) designed toprevent flooding of areas adjacent to thedefence.An embanked area designed to hold floodwaterfrom areas upstream and release it slowly toreduce flooding downstream. Embankmentsmay be constructed across the river or adjacentto the river, with flood flows being diverted intothe reservoir area.This occurs when flow entering a system, suchas an urban storm water drainage system,exceeds its discharge capacity, becomes blockedor when the system cannot discharge due to ahigh water level in the receiving watercourse.The features of flooding which have harmfulimpacts on people, property or the environment(such as the depth of water, speed of flow, rateof onset, duration, water quality etc.).
TermsDefinition47Flood hazard assessmentFloodplainFlood RiskFlood Risk Assessment(covers all scales ofassessment)Flood Risk Management(FRM)Flood Risk ManagementPlans (FRMP)Flood storageFlood zonesFlooding DirectiveFluvial floodingGroundwater floodingAn assessment of the hazards that would arisefrom flooding, e.g. identifying where floodingwould occur, how deep the water would be,how fast it would flow, how rapidly would itrise and how long it would remain.A floodplain is any low-lying area of land nextto a river or stream, which is susceptible topartial or complete inundation by water duringa flood event.An expression of the combination of the floodprobability or likelihood and the magnitude ofthe potential consequences of the flood event.A study to assess the risk of flooding under bothpresent and potential future circumstances ,such as changes in climate, land use,development or flood risk management.FRM combines the function of mitigating andmonitoring flood risks and may include preflood,flood-event or post-flood activities.Plans which are developed in accordance withnational flood policy and the EU FloodsDirective and which provide the strategicdirection for flood risk management decisions ina catchment. These will describe a range oftechniques from traditional river or coastaldefences to non-structural responses such asflood warning and resilience measures atproperty level.The temporary storage of excess run-off or riverflow in ponds, basins, reservoirs or on the floodplain.A geographic area for which the probability offlooding from rivers, estuaries or the sea iswithin a particular range as defined within theseguidelines.The EU Directive 2007/60/EC of 23 October2007 on the assessment and management offlood risks which is aimed at integrating theway flood risk is managed throughout theEuropean Union.Flooding from a river or other watercourse.Flooding caused by groundwater escaping fromthe ground when the water table rises to orabove ground level.Planning Guidelines
Page 7: At the site-specific level, develop
Page 10 and 11: Planning Guidelines
Page 12 and 13: 2regard to the guidelines in the pe
Page 14 and 15: 4Planning GuidelinesReport of the F
Page 16 and 17: 6Chapter 2:Flooding - Key ConceptsP
Page 18 and 19: 82.5 Increase in flooding due to de
Page 20 and 21: 10Flood risk2.13 Understanding floo
Page 22 and 23: 122.21 In undertaking a flood risk
Page 24 and 25: 142.30 Increases in rainfall intens
Page 26 and 27: 16after periods of heavy rainfall.
Page 28 and 29: 18that also meet the objectives of
Page 30 and 31: 20more than 1 in 200). Development
Page 32 and 33: 22Government under Section 28 of th
Page 34 and 35: 24Planning GuidelinesDevelopment in
Page 36 and 37: 26Chapter 4:Flooding and Spatial Pl
Page 38 and 39: 28floodplain. Effective co-ordinati
Page 40 and 41: 30Planning GuidelinesFig. 4: Develo
Page 42 and 43: 32• Include zoning objectives to
Page 44 and 45: 34specific areas, ensuring that flo
Page 46 and 47: 36should use the flood risk informa
Page 48 and 49: 38planning authority to ensure that
Page 50 and 51: 40• these guidelines, and in part
Page 52 and 53: 425.22 Where development proposals
Page 54 and 55: 44Chapter 6:ConclusionPlanning Guid
Page 58 and 59: 48TermsDefinitionPlanning Guideline
Page 64 and 65: 54Appendix A - Screening for andCar
Page 66 and 67: 56Climate changeincreased intensity
Page 68 and 69: 58Strategic assessments provide the
Page 70 and 71: 60As part of a FRA, information on
Page 72 and 73: 62A successful FRA is characterized
Page 74 and 75: 64• Suggested policies for sustai
Page 76 and 77: 66Planning Guidelines• The impact
Page 78 and 79: 68An additional document on interpr
Page 80 and 81: 70Table A2: The Flood Risk Balance
Page 82 and 83: 72Appendix B - Addressing FloodRisk
Page 84 and 85: 74Figure B2 below illustrates how t
Page 86 and 87: 76drainage processes and removing p
Page 88 and 89: 78• Signing of floodplain areas s
Page 90 and 91: 80flood level. Care must be taken t
Page 92 and 93: 82Appendix C - Frequently AskedQues
Page 94 and 95: 84What does the SFRA not provide?Th
Page 96 and 97: 86pressure in the embankment and ge
Page 98: Printed on recycled paper containin

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