FA: fix inconsistency in access to values of LDCs and limiting value. This fixes an issue with the water level being always over LDC in some diagrams. Also it presumably fixes a case, where width as a limiting factor was not used.

# 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