The prospect of gully gravure on reclaimed hillslopes
Conference
·
OSTI ID:588875
- Univ. of Denver, CO (United States)
- Geological Survey, Tucson, AZ (United States)
Hillslope development and evolution are the products of process-sequences. One such sequence is gully gravure, a mode of development requiring coarse-textured material overlying fine-textured material. Rill or gully processes erode through the coarse material into the fine material. The coarse material falls into and accumulates in the channel entrapping fine material. The permeability and porosity of the channel-fill is reduced, and runoff is deflected toward the periphery of the deposit. Thus, the loci of erosion shifts laterally along the hillsides. The sequence is completed by channel-filling with additional coarse material from the channel sides. A new surface of coarse material is created at a lower elevation as a result of lateral planation. Field studies near Tucson, Arizona and Denver, Colorado, indicate that gully gravure may occur on reclaimed hillslopes. Previous research suggests that gully gravure results in landscape stability, maintenance of adjusted hillslope angles, and low rates of denudation and sediment delivery, which are fundamental objectives of reclamation.
- OSTI ID:
- 588875
- Report Number(s):
- CONF-9605286--
- Country of Publication:
- United States
- Language:
- English
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