I ended up experimenting with making meanders today. I found that if you add just a little bit of extra "sand" to the lateral accretion areas (e.g. point bars) you end up producing very strong meanders. Particularly if you reduce the slope of the table.
Here's a shot of a few oxbow lakes being formed mid-run.
Here's a quick time-lapse video that demonstrates how adding extra material to the point bars rapidly increases the sinuosity of the stream. Keep in mind that the only thing I did here was to add sediment to areas of accretion. I didn't dig any channels or remove any material. I did have to add sediment along the floodplain in a few places to compensate for the change in gradient as the sinuosity increased.
Way cool. I've been using the models for 20 years now and never thought of adding sediment like that! Wow. Thanks!ReplyDelete