Trouble is, when you stick altitude indications on a map the natural guess is that all other things being equal, it's a straight slope from a higher band to the nearest point on a lower band, and in turn straight to the ocean. so the implication is not necessarily a bunch of massive mountains that you don't intend.
I say a mere 200 on purpose - it doesn't take but a few feet of altitude differential to steer a river one way instead of another. Rivers where you put them kind of imply some more raised land, say the new second-lightest gray, at maybe 200 ft altitude: Your rivers paralleling coasts could be explained away by another intermediate altitude color - say your original darkest two grays are 1000ft and 2000 ft altitude. One problem is that a certain pattern of rivers implies a certain topography:Įven just a set of coastlines implies a lot about what's going on altitude-wise onshore: Neither your river network nor your landforms are outright nonsensical, but the combination is, like the folks above have said, not plausible in some places. Have you taken a look at the most excellent tutorial titled How To Get Your Rivers in the Right Place, in the tutorial forum? It explains water behavior vs. These aren't deserts, but they are also not characterized by many rivers. Humans (and presumably other culture-using species) are very good at adapting to their environment and also at adapting the environment to themselves.įor examples of the kinds of cultures that will grow up in a land with few rivers, consider the steppes of Asia and the Great Plains of America, west of the Mississippi. That's not going to be a 100% thing, of course. Without a source for irrigation, agriculture is likely to be a supplementary subsistence activity rather than a primary one. Semi-arid areas that don't show much in the way of major rivers are likely to support more pastoralist cultures rather than farming ones. The spots where the lowlands are closest to the ridges are going to be valleys, which will be likely to collect rain and snow, and thus form rivers. Likewise, there are a couple flowing from the "point" of a mountain range rather than the "pocket," if that makes sense. I would expect it to flow away from the ridgeline first before turning southward, unless it's running in a canyon that isn't obvious from the low resolution of the height data. The westernmost that has its headwaters at a latitude around -15, for instance. There are also a couple that appear to be running parallel to the slope of a mountain rather than flowing on downhill.
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