Table 2. Standard designs from Som et al. [15].

Note that ‘name in package’ is the string argument that must be passed to the drawStreamNetworkSamples function to use the sampling scheme.

ID	Name in package	Description
SRS	SRS	Simple random sampling. An unstratified random sample of sites.
G1	GRTS	GRTS. Spatially balanced design [24].
G2	GRTSmouth	GRTS with one site always assigned to the stream outlet.
G4	GRTSclus	GRTS with clusters of sites around confluences.
H1	Headwater.Clusts.and.Singles	Headwater samples. One site allocated to the outlet and others preferentially allocated to tributaries.
C3	Trib.Sets.Head.Singles.sample	Clustered triplets. As many points as possible are allocated to triplets clustered where each segment meets at a confluence. All remaining points are assigned to tributaries.
C4	Trib.Sets.Head.Singles.Mouth.sample	C3 with a single point allocated to the outlet segment.