Definition of water year courtesy CoCoRaHS:
Hydrologists and climatologists often use the “Water Year” calendar for tracking water resources. While the definition may vary regionally, a common definition of “water year” is October 1 through September 30th. In the cool months, evaporation rates are very low, snow accumulates in cold regions, storms tend to be widespread, and most areas see accumulation of moisture in the soil. Then comes spring with it’s accompanying snow melt and high runoff from mountainous regions and higher latitudes. The summer months bring high evaporation rates. Precipitation (much from thunderstorms) becomes much more localized. Soil moisture may be gradually depleted during summer as vegetation uses large volumes of water. Streams run slower and clearer.
Here is the water year summary for our CoCoRaHS station IL-GY-1
|Month||Daily Report Count||Total Pcpn||Days With Pcpn||Days w/Trace|
|Water Year Totals:||365 reports||42.16″||147 days||34 days|
|Month||Total Snowfall||Days Snowfall||Days Snow On Gnd|
|Water Year Totals:||32.8″||28 days||66 days|