I've seen this multiple times, and it seriously bothers me. The idea is that you have to land on the narrow strip of land between them, then immediately jump again to avoid the one in the back. Sometimes, depending on the space between them and the speed you're going, you can jump over both of them at once. But if your encounters have been anything like mine, most of the time that isn't an option, and by the time you realize you've found yourself in the same crappy situation again, you don't have time to react. It's either let yourself fall in the river, or jump straight into the log trap. It's poor game design, and it's one of the many things that need to be changed in the next update.
I've seen the same setup. It's killed me twice, I jumped the whole lot once and I managed to Dash through once or twice.
Considering the whole game level is procedurally generated there must be rules about how close two hazard can be. Maybe every hazard has an average buffer-zone but it changes randomly and there's a small chance to get this impossible deathtrap?