Whereas Information Management (IM) is concerned with information activities (find, create, receive, acquire, monitor, classify, index - ... - information); Knowledge Management (KM) is concerned with knowledge behaviours: teach, share, learn, act, decide, etc.
I have previously described the IM Problem Space. Similarly, the KM Problem space can be described as follows:

My interest is primarily in IM rather than KM, so I'll stop here. I'll just say that I consider IM and KM as part-overlapping disciplines, seeking to address part-overlapping management spaces.