For a given site, uses the configuration file to determine which site is encountered next moving downstream, using the report river kilometer (RKM) from the configuration file.
findDwnStrmSite_RKM(
site,
configurationFile,
include.MMR.sites = F,
rootSite = "GRA"
)character value of site code
data.frame with column called SiteID with site codes, a column called RKM with the river mask codes,
and a column called SiteType with values of either INT for interrogation sites or MMR for mark/recapture/recovery sites
TRUE/FALSE should MMR sites be included. Default is FALSE
character value of the site code for the root site for which the path should be traced from