net_confl: Confluence Attributes
In dkopp3/MMASN: Multi-Scale Morphomettic Analysis of Stream Networks

Description Usage Arguments Details Value

Calculates metrics related to confluences in a network

1	net_confl(network, vaa, flow)

`network`	a single network extracted from NHDPlusV2
`vaa`	NHDPlusV2 value added attributes table, PlusFlowlineVAA.dbf"
`flow`	NHDPlusV2 flow table, PlusFlow.dbf

Lambert Conformal Cone (crs = 102004) used to preserve angles Seybold et al. (2017) is no longer available

in some cases tributary angle is NAN because average tributary direction is near verticle. the function cannot determine starts/end of line needed to calculate direction position vector direction. this could be could fix this by changing the maximum verticies

Complex confluences >2 tributaries are incorrect.

Confluence angle is the angle two tributarys meet. Calculated as the intersection between two slopes orthoganal regression slopes reflecting each tributary's average direction

Area ratio is the ratio of the tributary catchment area to the mainstem catchment area. Mainstem is identified as tributary with the largest catchment area

confluence area is the total area upstream of the confluence

confluence order is the stream order directly downstream of the confluence

confluence class is the stream order of each tributary in the confluence

data.frame of confluence angle (Confl_angle), area ratio (AreaRatio), total upstream area Confl_AREA, order of the tributary (Confl_order), and tributary classification Confl_class

dkopp3/MMASN documentation built on Dec. 20, 2021, 12:07 a.m.