Reconnaissance of sediment transport and channel morphology in the Lower Rio Bermejo Basin, Argentina - with a section on reconnaissance of the lower Rio Pilcomayo Basin, Argentina and Paraguay

Ritter, John R.

Abstract:

Sediment transport conditions are described for the Lower Rio Bermejo and the Rio Pilcomayo in the Gran Chaco region of northern Argentina and southern Paraguay. The Lower Rio Bermejo is in many ways atypical, as its channel narrows downstream. Also its flow decreases downstream even though average annual rainfall at its mouth is twice that at its head (1,200 mm vs. 600 mm) and its suspended-sediment at El Yacare was about 41 million metric tonnes per year during 1970-73 and 82 million metric tonnes per year at El Colorado. The Rio Pilcomayo ‘ Superior ‘ disappears near Laguna Escalante, owing to plugging of its channel by sediment, into a network of shallow lakes and marshes. Another stream known as the Rio Pilcomayo ‘ Inferior ‘ appears about 160 km to the southeast and meanders downstream to the Rio Paraguay. The Rio Pilcomayo ‘ Superior ‘ carries about 100 million metric tonnes of sediment per year. The average annual concentration of sediment is more than 6 kg per cubic meter of flow. (Woodard-USGS)

Genre:

USGS Numbered Series

ProdID:

10864

Citation Author:

Ritter, John R.

Citation Contributing Office:

Citation Datum:

Citation Day:

Citation Edition:

Citation Editor:

Citation End Page:

Citation Issue:

Citation Keywords:

Citation Language:

ENGLISH

Citation Larger Work Title:

Citation LatN:

Citation LatS:

Citation LonE:

Citation LonW:

Citation Month:

Citation No Pagination:

Citation Number Of Pages:

Citation Online Only Flag:

Citation Phsyical Description:

v, 4l leaves :ill., 4 maps (1 fold. in pocket) ;29 cm.; (60 p., 1 sheet, scale 1:4,000,000 - PGS)

Citation Projection:

Citation Public Comments:

Citation Publisher:

U.S. Geological Survey,

Citation Series:

Open-File Report

Citation Series Code:

OFR

Citation Series Number:

76-564

Citation Search Results Text:

Reconnaissance of sediment transport and channel morphology in the Lower Rio Bermejo Basin, Argentina - with a section on reconnaissance of the lower Rio Pilcomayo Basin, Argentina and Paraguay; 1976; OFR; 76-564; Ritter, John R.