Model to predict photosynthetically active radiation at the benthic surface.

This function builds on the stream_light function by adding in several key components. First, it makes some modifications to allow better handling of dynamic wetted widths. Secondly, it moves beyond making predictions at the stream surface and includes the influence of surface reflection and attenuation as a function of depth and clarity to predict PAR at the benthic surface. Note that aqua_light will still output estimates of PAR at the stream surface denoted by the column "PAR_surface".

Usage

aqua_light(
  driver_file,
  Lat,
  Lon,
  channel_azimuth,
  bankfull_width,
  BH,
  TH,
  overhang,
  overhang_height,
  x_LAD
)

Arguments

driver_file

The model driver file

Lat

The site Latitude

Lon

The site Longitude

channel_azimuth

Channel azimuth

bankfull_width

Bankfull width

BH

Bank height

TH

Tree height

overhang

Effectively canopy radius

overhang_height

height of the maximum canopy overhang (think canopy radius)

x_LAD

Leaf angle distribution, default = 1

WL

Water level

Value

Returns a time series of predicted photosynthetically active radiation