Add delta to reference waterlevel to current depth. If the current waterlevel is at LDC the delta is 0 and the profile is drawn unchanged. If the current waterlevel is higher the delta adds to the measured depth. If the current waterlevel is below the delta subtracts from the measured depth.

# documentation
**/README*
**/docs
**/*.md

# backend binary
cmd/gemma/gemma

# Dependency directories
.buildbase
**/node_modules

# local dotenv environment variables file
client/.env.local

# Tags tables
**/TAGS