At the business and water conference, Julie van der Bliek of the International Water Management Institute gave a fascinating talk on the Jordan River's death by a thousand diversions. Her slides [pdf] show how flows in an out of the Jordan started like this:
River basin trajectories: societies, environments and development [pdf]. Wallingford, UK: CABI; Colombo, Sri Lanka: IWMI. pp.20-46, but the images came from this paper [PDF]
Bottom Line: At some point, water flows are more about accounting than nature.