Wapato Lake -- Interactive Lake Level Tool
Hover over the data plot below to view the lake level elevation, surface area, and volume by date.
The water level of Wapato Lake dictates the size (surface area) of the lake and the amount of water that it stores. This web page allows the user to interactively explore Wapato Lake water level data and how the water level translates into lake area and volume.
Select the time period of interest from the drop-down list labelled "Change Time Interval" and hover the mouse over the graph. The mouse position selects the date, and the table under the graph then shows the lake level elevation (feet above NAVD88), surface area (acres), and volume (acre-feet). NAVD88 is the North American Vertical Datum of 1988, and provides a reference elevation roughly equal to sea level. Dates are in Pacific Standard Time. As you move the mouse, the map of the lake will change to show the rough outline of the lake at that lake level.
After selecting a time period, you can zoom in to a particular place on the graph by holding down the left mouse button and dragging the mouse to create a rectangular zoom area. Release the mouse button and the graph will zoom to that area. The Reset button below the graph will reset the graph to the chosen time period. You also can zoom only on a date period by choosing "X-Axis Selection" under the "Change Selection Mode" drop-down list.
You can remove or add the daily average water levels or the instantaneous water levels by clicking on the box to the left of their labels at the top of the graph. Lake levels indicated below the graph are interpolated from the first active dataset in that list. In other words, if you want to see the instantaneous values displayed below the graph, turn off the daily averages.