The analysis in the OP was from an orbiter, not a lander. The chances of landing...

mturmon on Aug 5, 2011 | parent | context | favorite | on: NASA Spacecraft Data Suggest Water Flowing on Mars

The analysis in the OP was from an orbiter, not a lander. The chances of landing a crew near such a site by chance seem low. And it would not happen this decade anyway. You need unmanned surveys to determine if and where it would be worthwhile to send a crew.