# Oroville Dam Reservoir Baselines

# Overview

• Oroville Dam water levels continue to be suppressed following the February, 2017 incident.
• Lagged time series facilitate year-on-year comparison and help determine the baseline.
• Past series are de-emphasized using calculated opacity.

# Keywords

last-marker, time-offset, hex code, range, context-path, for

# Graphics

# Syntax Features

• time-offset setting to add time lag to the series.

[series]
  time-offset = @{offset} year
  # time-offset = 1 year

• for loop to add multiple lagged series.

for name in offsets
  # access current element by @{name}
endfor

• range function to generate a numeric sequence, for example a range of years by which the series is shifted to the past. The function can be invoked inline.

# define named array
var offsets = range(1,20)
# inline array
for offset in range(1,10)