Manitoba Drought Monitoring: Groundwater Conditions

This is a feature layer of groundwater level monitoring stations used to track drought conditions across Manitoba. Water level data are obtained from the Groundwater Management Section, Manitoba Sustainable Development. Near real-time data are preliminary as they can be impacted by environmental variables or equipment malfunction. Preliminary data are subject to change upon review. Fields included: Station_ID: Monitoring station identifier Name: Monitoring station description Lat: Latitude (decimal degrees) Long: Longitude (decimal degrees) Date: Measurement date. Data is current for the date indicated. Conditions will be updated monthly at the start of the month. Frequency of updates may increase as conditions warrant. Near-real time data are preliminary and subject to change upon review. Level: Information on groundwater level (in metres above sea level) for that location. Percentile: Groundwater conditions are monitored to determine the severity of hydrological dryness in a watershed. Groundwater measurements are converted to percentiles by comparing daily measurements from a specified day to historical measurements over the monitoring station’s period of record for that particular day. A percentile is a value on a scale of one hundred that indicates the percent of a distribution that is equal to or below it. Class: Based on percentile: Groundwater level which is greater than the 90th percentile is classified as “much above normal”. Groundwater level which is between the 75th and 90th percentile is classified as “above normal”. Groundwater level which is between the 25th and 75th percentiles is classified as “normal”. Groundwater level which is between the 10th and 25th percentile is classified as “below normal”. Groundwater level which is less than the 10th percentile is classified as “much below normal”. Monitoring stations classified as “No Data” do not have current estimates of streamflow (or lake level) available. Units: Measurement units. Groundwater level is reported in metres above sea level. GW_Level_Plot: Hyperlink to the online Percentile Plot (in PDF format) for the location. The Percentile Plot displays a three-year time series of observed conditions relative to the historical percentiles described above. The period of record used to compute the percentiles is stated alongside the station ID. "Median" indicates the midpoint (or 50th percentile) of the distribution, whereby 50 % of the data falls below the given point, and 50 % falls above. Other categories include: "Lowest”: indicates that the estimated groundwater level is the lowest value ever measured for the day of the year. "Highest”: indicates that the estimated groundwater level is the highest value ever measured for the day of the year. For more information, please visit the Groundwater Management website.本数据集为曼尼托巴省（Manitoba）地下水位监测站点要素图层，用于追踪全省干旱状况。水位数据取自曼尼托巴省可持续发展厅地下水管理科。 近实时数据为初步数据，易受环境变量或设备故障影响，经审核后可能发生变更。 包含以下字段： 1. 站点编号（Station_ID）：监测站点唯一标识符 2. 名称（Name）：监测站点描述信息 3. 纬度（Lat）：纬度（以十进制度为单位） 4. 经度（Long）：经度（以十进制度为单位） 5. 日期（Date）：测量日期，数据以标注日期为准。 数据状况将每月月初更新，视实际情况可能提高更新频率。 注：近实时数据仍为初步数据，经审核后可能发生变更。 6. 水位（Level）：对应点位的地下水位信息，单位为海拔米（metres above sea level）。 7. 百分位值（Percentile）：通过将监测站点当日的实测数据与该站点对应日期的历史观测记录进行对比，将地下水位测量值转换为百分位值，以评估流域内水文干旱严重程度。百分位值取值范围为0至100，用于表示某一分布中等于或低于该值的数据占比。 8. 等级（Class）：基于百分位值划分如下： - 大于90百分位：远高于正常水平 - 75至90百分位：高于正常水平 - 25至75百分位：正常水平 - 10至25百分位：低于正常水平 - 小于10百分位：远低于正常水平 标注为“无数据（No Data）”的监测站点暂无有效径流量（或湖水位）估算值。 9. 单位（Units）：测量单位，地下水位以海拔米为单位报告。 10. 地下水位绘图链接（GW_Level_Plot）：指向对应点位在线百分位绘图（PDF格式）的超链接。该百分位绘图展示了近三年观测状况与上述历史百分位的对比时序数据，计算百分位所用的观测记录周期会标注在站点编号旁。“中位数（Median）”指分布的中点（即50百分位），意味着50%的数据低于该点，50%的数据高于该点。其他分类包括：“最低值（Lowest）”：表示估算的地下水位为该日期历年实测中的最低值；“最高值（Highest）”：表示估算的地下水位为该日期历年实测中的最高值。 如需更多信息，请访问地下水管理部门官方网站。