Water resources, salinity and salt yields of the rivers of the Bolivian Amazon

Roche, Michel-Alain; Jáuregui, Carlos Fernández

doi:10.1016/0022-1694(88)90042-x

Cited by 36 publications

(24 citation statements)

References 5 publications

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“…The Andes divert the humid air coming from the NE to the SE, thus causing heavy rainfall in the Andean foothills where, for example, the Chapare region ( Fig. 1) receives more than 6,000 mm/yr (Guyot & Wasson 1994;Roche & Jauregui 1988;Ronchail et al 2005). The area is affected by a marked seasonality characterized by wet summers with extensive inundations and dry winters.…”

Section: Study Areamentioning

confidence: 99%

“…The mean annual discharge of the Río Mamoré at Trinidad is 3,150 m³/s, increasing to 8,340 m³/s after confluence with Río Iténez (Bourrel et al 2009). Together, the Río Mamoré and the Río Beni have a discharge of 17,000 m³/s when they join to form the Río Madeira (Roche & Jauregui 1988). River discharge, however, depends greatly on inter-seasonal variations in rainfall.…”

Section: Recent Hydrological Dynamics In the Beni Basinmentioning

confidence: 99%

“…Most published studies, however, have been concerned with hydrogeomorphic variability on short time scales and mainly examine the mechanisms and frequencies of flooding (Aalto et al 2003;Bourrel et al 2009;Hamilton et al 2004;Hamilton 2009;Ronchail et al 2005), sediment composition, discharge and fluvial geomorphology of the Río Mamoré and the Río Beni (Charrière et al 2004;Dumont & Fournier 1994;Elbaz-Poulichet et al 1999;Gautier et al 2007;Guyot et al 1999;Guyot et al 2007), as well as their water chemistry (Guyot et al 1991;Roche & Jauregui 1988). While all of these short-term studies have contributed to recognition of a highly variable hydrological system in the Beni basin, virtually no data are available with regard to type, magnitude and controlling factors of fluvial changes in the past.…”

Section: Introductionmentioning

confidence: 99%

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Review of past and recent fluvial dynamics in the Beni lowlands, NE Bolivia

2012

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Section: Study Areamentioning

confidence: 99%

Section: Recent Hydrological Dynamics In the Beni Basinmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Review of past and recent fluvial dynamics in the Beni lowlands, NE Bolivia

2012

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“…Three large meandering rivers cross the Bolivian Amazonia from west to east: two Andean tributaries (Rio Beni and Rio Mamoré) and a Brazilian Shield tributary (Itenez-Guaporé River) (Figure 1). The Beni River (with a basin area of 282 500 km 2 ) is the main tributary of the Rio Madeira, the latter being one of the most extended fluvial networks and the main sediment input to the Amazon River (Guyot, 1993;Guyot et al, 1999;Pouilly et al, 2004;Roche and Fernandez, 1988).…”

Section: Introductionmentioning

confidence: 98%

Channel and floodplain sediment dynamics in a reach of the tropical meandering Rio Beni (Bolivian Amazonia)

Gautier

Brunstein

Vauchel³

et al. 2010

Earth Surf Processes Landf

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The study investigates interactions, water and sediment exchanges, between a rapidly migrating meander and its associated floodplain at fine temporal and spatial scales. The Beni River, an Amazonian free meandering river, makes the transition between Andean ranges and Amazonian lowlands. For the period 2002-2006, an assemblage of tools and methods (water and sediment discharges, topometric and bathymetric surveys, sedimentation rate estimations from unsupported 210 Pb and sediment trapping system) was used to jointly analyse the influence on the sediment budget of external factors (mainly water and sediment discharge) and the inherent behaviour of the system. The main issue addressed is the investigation of the complex relationship between 'morphological conditioning' of fluvial landform and process. The first part of the study was undertaken with the aim of linking erosion-deposition in an active meander with water and sediment fluxes. The three inter-annual evolutions are characterized by very unequal sediment budgets; the first two intervals underwent predominant erosion, and the latter slight accumulation. Digital elevation models, evaluated for the active meander, demonstrate that sedimentation on the point bar depends more on external factors than erosion of the concave bank, which fluctuates slightly. The second part of the study, focusing on water and sediment exchanges between active bend and floodplain, examines the respective parts played by overbank flow and by an abandoned channel on the diffusion and sequestration of sediment. The association of short-and long-term estimation of sedimentation rates suggests that floodplain construction is associated with two different processes and rhythms of sediment transportation. Finally, a sediment budget is proposed for the Beni River in the upper part of the Amazonian lowlands.

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“…Richey et al 1990 regions, the global impact of such development on the organic C fluxes in these rivers is hardly predictable. The drainage basin of the Rio Madeira upstream of the Brazilian frontier extends over 900,000 km2 and supplies on average 18,000 m3 of water s-l. Andean tributaries are known to provide most of the yields for both dissolved and sediment loads (Roche and Fernandez 1988;Guyot et al 1988), but nothing is known about organic C. This large, highly contrasted, and still relatively pristine tropical basin now constitutes a study area of high interest, inasmuch as it is covered by the PHICAB hydrological network which has been providing daily data on discharge and total dissolved and suspended solids (TDS and TSS) at 11 gauging stations since 1983. Our study was designed to investigate the spatial pattern of riverine dissolved organic C (DOC), to identify possible causes of variation, and to propose a framework for the regionalization of the DOC dynamics.…”

mentioning

confidence: 99%

Regional pattern of riverine dissolved organic carbon in the Amazon drainage basin of Bolivia

Guyot¹,

Wasson²

1994

Limnology & Oceanography

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Dissolved organic carbon (DOC) was analyzed at 11 hydrometric stations and 41 Andean and lowland sites in the upper Rio Madeira drainage basin where anthropogenic alteration is low. The two regions, Andes and Llanos, behave very differently. Mean DOC is 2.2 mg liter−1 (range, 1.2–4.2 mg liter−1) in the Andes and 5.7 mg liter−1(range, 4.8–7.4 mg liter−1) in the Llanos. DOC enrichment may occur rapidly as Andean rivers enter the Llanos. The specific DOC export is correlated with the watershed forested area in the Andes but not in the Llanos. Specific DOC yield for a given water runoff is 3 times higher in the Llanos. Regionalization seems important for predicting DOC dynamics in such a large basin.

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Water resources, salinity and salt yields of the rivers of the Bolivian Amazon

Cited by 36 publications

References 5 publications

Review of past and recent fluvial dynamics in the Beni lowlands, NE Bolivia

Review of past and recent fluvial dynamics in the Beni lowlands, NE Bolivia

Channel and floodplain sediment dynamics in a reach of the tropical meandering Rio Beni (Bolivian Amazonia)

Regional pattern of riverine dissolved organic carbon in the Amazon drainage basin of Bolivia

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