Accession Number : ADA188954

Title :   Experimental Geomorphology (Drainage Network, Piedmont and Channel Morphology).

Descriptive Note : Final rept. 1 Sep 84-1 Sep 87,

Corporate Author : COLORADO STATE UNIV FORT COLLINS

Personal Author(s) : Schumm, S A

PDF Url : ADA188954

Report Date : 15 Oct 1987

Pagination or Media Count : 23

Abstract : A series of experimental studies were carried out in a large rainfall -erosion facility and in a large flume. Braided-stream experiments reveal that significant differences in the shape of bars, braiding index and channel behavior depend on channel gradient and sediment load. Deformation of a drainage network by uplift produced fractures that followed the drainage pattern. Incision of the pattern depends on rate of uplift, with slow uplift permitting lateral shift but rapid uplift producing vertical incision. The junctions angles of drainage patterns change markedly at a surface slope of about 2%, and the effect of vegetation cover on erosion rates is minimal below 7% cover. Multiple pediments formed, during experiments on the development of piedmont landforms, when pedimont drainages integrated and incised.

Descriptors :   *DRAINAGE, *STREAMS, ANGLES, CHANNELS(WATERWAYS), DEFORMATION, EROSION, EXPERIMENTAL DESIGN, FACILITIES, GEOMORPHOLOGY, GRADIENTS, JUNCTIONS, LANDFORMS, MORPHOLOGY, NETWORKS, PATTERNS, RAINFALL, RATES, SEDIMENTS, SHAPE, SLOPE, SURFACES, VEGETATION, BRAIDS, CRACKS, LANDFORMS, DEGRADATION, SANDBARS

Subject Categories : Geology, Geochemistry and Mineralogy
      Hydrology, Limnology and Potamology

Distribution Statement : APPROVED FOR PUBLIC RELEASE