1:1000 Flood Map (0.1% chance of occurring in any year)

(Note: Updated inundation maps for 1:2 to 1:1000 floods are available from Alberta Environment and Parks (2020). The new draft maps can be viewed here: https://floods.alberta.ca/?app_code=FI&mapType=Draft)

These inundation maps show whether a property is at risk for various sized river floods. The size of flood shown on this map has a 1/1000 or a 0.1% chance of occurring in any year.

The three distinct types of inundation shown on the maps are:
o Inundation - Area flooded overland due to riverbank overtopping.
o Isolated - Low lying areas that will not be wet from riverbank overtopping, but may experience groundwater seepage or stormwater backup.
o Potential failure of flood protection barrier - Low lying areas that could be flooded if an existing permanent flood protection barrier were to fail.

The flood areas shown were mapped in 2015 jointly by Alberta Environment and Parks and the City of Calgary, using the best available hydrologic and hydraulic data and models. As such, the flooding shown reflects 2015 conditions, hydrology and topography. The effects of mitigation measures (changes to reservoirs/dams or barriers) built since 2015 are not included. There is uncertainty inherent in predicting the effects of flood events, and this uncertainty increases for floods with less than a 1% chance of occurrence in any year. Any use of this data must recognizing the uncertainty with regards to the exact location and extent of flooding.

More information on flood mapping for Calgary is available at https://calgary.ca/flood
For Calgary's River Flood story, see: https://maps.calgary.ca/RiverFlooding/

（注：阿尔伯塔省环境和公园部门（2020年）提供了1:2至1:1000洪水淹没地图的最新更新。新的草案地图可在此处查看：https://floods.alberta.ca/?app_code=FI&mapType=Draft。）

这些淹没地图展示了财产在各类规模河流洪水中的风险情况。该地图上所示洪水规模在任意一年发生的概率为1/1000或0.1%。

地图上展示了三种不同的淹没类型：
- 淹没：因河岸溢出而洪水泛滥的区域。
- 孤立：低洼地区，即使河岸溢出也不会被淹没，但可能经历地下水位上升或暴雨积水倒灌。
- 洪水防护屏障潜在失效：低洼地区，如果现有的永久性洪水防护屏障失效，则可能被洪水淹没。

2015年，阿尔伯塔省环境和公园部门与卡尔加里市共同使用当时最佳的 hydrologic 和 hydraulic 数据和模型绘制了显示的洪水区域。因此，所示的洪水反映了2015年的条件、水文和地形。自2015年以来建设的中和措施（水库/大坝或屏障的改变）的效果未包含在内。预测洪水事件的效果固存在不确定性，且这种不确定性在任意一年发生概率低于1%的洪水事件中增加。任何使用此数据的行为都必须认识到关于洪水确切位置和范围的这种不确定性。

有关卡尔加里洪水测绘的更多信息，请访问 https://calgary.ca/flood
有关卡尔加里河流洪水故事，请参阅：https://maps.calgary.ca/RiverFlooding/。