Next up for presentation are the "reeds"... which are slightly more complicated -- and also less impressive -- simply because they were built by me instead of a world-class master of the model-making trade!
It all started with my all-time favorite online terrain-board building tutorial courtesy of Clarence Handerson's Quindia Studios. Sadly, some time in late February or early March 2015, the old version of said website, along with its various "Articles", one of which contained the brilliant tutorial in question, disappeared from the web. However, I'm happy to report that Clarence has since responded to pleas from myself and other fans of his work and has begun to repost all the missing tutorials. He hasn't reached his tutorial on RIVER REEDS yet, so I can't show you pics of how he did it, but when he reaches that point I'll come back to this post and bring it up to speed with links to his site and pics from his original post.
The key element was using an inexpensive WHISK BROOM from the hardware store -- even at today's inflated prices only a $5.00 or $6.00 item -- as the source for "natural" colored river reeds by cutting small bunches of the n bristles yellow-ochre bristles off and gluing them down to your dug-out and painted river-bed before pouring on the liquid resin.
Reeds, cattails and water grass exist in one form or another along the banks of most of the rivers on Earth, so adding some reeds to your model river should add to its scenic realism, as seen to good effect in these pics taken from Clarence's Qundia Studios blog: