Volume lookup table constructed from RRE bathymetry. Structured as:

`dist`

distance along the thalweg marking the edge of each zone furthest from the mouth, e.g.`dist = 100`

identifies the region spanning 0 meters and 100 meters along the thalweg.`elev`

elevation marking the the top of the depth increment, i.e.`elev = 0.1`

identifies the region spanning 0 and 0.1 meters elevation.`count`

the total number of cells contained within each zone and vertical increment.

data(volumes)

A data frame with 3 variables

The volume lookup table was generated from the RRE bathymetry DEM
and zone delineations based on a manual trace of the river thaleweg. The
volume cells are defined as having a length of 1 meter, width of 1 meter,
and height of 0.1 meters (cell volume of 0.1 cubic meters). Zones are
delineated in 100-meter increments along the thalweg, and each zone is
divided in the vertical into 0.1-meter increments from a minimum elevation
of -15.8 meters to a maximum elevation of 2.6 meters. The lookup table
lists the count of volume elements in each vertical increment in each
zone, i.e. each row lists the number of elements between river distances
`d`

and `d - 100`

and between depths `z`

and
`z - 0.1`

.