About: http://webisa.webdatacommons.org/216180311

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	They do indeed account for glacial rebound, greater outflows from an over-dredged Lake St. Claire...and of course both of those things are a factor.
http://www.w3.org/ns/prov#wasQuotedFrom	dailykos.com