alluvial cones in a sentence

1. South of the town there is another drain system carrying the disappearing in the alluvial cone waters from the rivers Eninska and Kranska towards the Tundzha river.
2. The underground waters of the considerable in range and flow rate alluvial cones play an important role in the drain regulation during summer season when the rainfall is minimum.
3. Built on an alluvial cone of the Morge, a frontier mountain stream, St . Gingolph is surrounded by mountains and has approximately 8 km of shore-line alongside the lake.
4. It's difficult to find alluvial cones in a sentence.