167. StorageToElevation

This function performs a lookup in a Reservoir object's Elevation Volume Table based on a given storage and evaluates to the corresponding pool elevation.

Description

Find the reservoir elevation at a given storage.

Type

NUMERIC

Arguments

Type

Meaning

1

OBJECT

reservoir object

2

NUMERIC

storage

Evaluation

The storage argument is looked up in the Storage column of the Elevation Volume Table of the reservoir object argument to determine the Pool Elevation. If the exact storage is not in the table, the lookup performs a linear interpolation between the two nearest bounding storages and their corresponding elevation values.

Mathematical Expression
StorageToElevation.jpg

Comments

If the object is not a reservoir, the function aborts the run with an error.

If the reservoir is a Slope Power Reservoir, the calculation is based only on level storage and does not include any wedge storage effects.

This function will issue an error if the "Time Varying Elevation Volume" method, (Objects.pdf, Section 22.1.24.2) , is selected. Instead, use the StorageToElevationAtDate function described next.

Syntax Example:

StorageToElevation(%"WattsBar", 442.39 "1000 cfsday")

Return Example:

1792.25 "m"