Lake and reservoir channel storage curve determining method based on hydrometry

The invention discloses a lake and reservoir channel storage curve determining method based on hydrometry. The lake and reservoir channel storage curve determining method includes the steps that water volume conservativeness inspection and correction of flow observation data are conducted; an inlet average daily water level model of a river way is determined on the basis of hydrometry data within the water level rise and fall period with the inlet average daily flow, the outlet average daily flow and the outlet average daily water level as parameters; the lake and reservoir channel storage process within the typical hydrologic year water level rise and fall period is calculated day by day, and the channel storage amount of each date is obtained; the function relationship between the channel storage amounts and represented water levels is determined; and a channel storage curve family is drawn according to the function relationship of the channel storage amounts and the represented water levels. According to t