Add Streamorder — add_streamorder • hydroloom

Adds a strahler stream order.

Algorithm: If more than one upstream flowline has an order equal to the maximum upstream order then the downstream flowline is assigned the maximum upstream order plus one. Otherwise it is assigned the maximum upstream order.

To match the NHDPlus algorithm, non-dendritic network connectivity must be included. All secondary paths will have the stream_order of upstream primary paths and a stream_calculator value of 0. Secondary paths have no affect on the order of downstream paths.

Usage

add_streamorder(x, status = TRUE)

# S3 method for class 'data.frame'
add_streamorder(x, status = TRUE)

# S3 method for class 'hy'
add_streamorder(x, status = TRUE)

Arguments

x: data.frame network compatible with hydroloom_names.
status: boolean if status updates should be printed.

Value

data.frame containing added stream_order and stream_calculator attribute.

Details

Required attributes: id and toid or fromnode, tonode, and divergence

Examples

x <- sf::read_sf(system.file("extdata/new_hope.gpkg", package = "hydroloom"))

x <- dplyr::select(x, COMID, FromNode, ToNode, Divergence)

x <- add_streamorder(x)

plot(sf::st_geometry(x), lwd = x$stream_order, col = "blue")

plot(sf::st_geometry(x), lwd = x$stream_calculator, col = "blue")