The role of a floodplain in regulating aquifer recharge during a flood event of the River Adour in southwest France

Brunet, R.-C.; Astin, K. Brian; Dartiguelongue, Sophie

doi:10.1672/0277-5212(2003)023[0190:troafi]2.0.co;2

Cited by 5 publications

(9 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…5 days at depths of 1-2 m. Both floodplains are served by numerous drainage channels that allow efficient emptying of the area following the flood events. During the flood events the Barthes play a significant hydrological role owing to the large volumes of water stored (Brunet and Astin, 1997;Brunet et al, 2003). This storage capacity, coupled with the existence of man-made dykes, affords flood protection to towns in the area, particularly Dax, and provides significant dilution of point discharges from the many farms in the area.…”

Section: Article In Pressmentioning

confidence: 99%

A comparison of sediment deposition in two adjacent floodplains of the River Adour in southwest France

Brunet¹,

Astin

2008

Journal of Environmental Management

Self Cite

View full text Add to dashboard Cite

Section: Article In Pressmentioning

confidence: 99%

A comparison of sediment deposition in two adjacent floodplains of the River Adour in southwest France

Brunet¹,

Astin

2008

Journal of Environmental Management

Self Cite

View full text Add to dashboard Cite

“…In a previous study, (Brunet et al 2003), found a good correlation between the discharge of the Adour and the variation in conductivity and dissolved nitrate concentration in the river water. Similar temporal variations, albeit attenuated, are also observed at the foot of the terrace, i.e.…”

Section: Discussionmentioning

confidence: 80%

“…If we assume an average bulk density of 1.5-1.8 t m −3 for this silty material then the total mass of sediment is 15.75-18.9×10 6 t. If we further assume that the mean organic nitrogen concentration is ca. 2 mg g −1 (PNRZH 2000) we would have 31,500-37,800 t of organic nitrogen within the floodplain sub-surface to a depth of 1.5 m. Brunet et al (2003) have calculated the volume of water present in the sub-surface to be 2.1×10 6 m 3 and, given the very low nitrate concentrations in the sub-surface at the piezometers (ca. 1 mg l −1 ), we can estimate a very modest load of 2.1 t of nitrate in the sub-surface.…”

Section: Discussionmentioning

confidence: 99%

“…For each sampling date, the water from wells W2-W5 has the same conductivity, suggesting that all the wells are in hydraulic contact with the floodplain aquifer. By contrast, at the beginning of the flood event, of March 1999, well, W1, the closest to the River Adour has a measured conductivity of 580 μS, comparable with that of the river itself, (Brunet et al 2003).…”

Section: Water Quality In the Sub-surfacementioning

confidence: 93%

“…4 Water mixing during the filling of the flood zone. The effects arising from the confluence of a perched floodplain aquifer with the river aquifer during large-scale flood events have been used to derive a detailed hydrological balance for a flood event (Brunet et al 2003).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Mineralisation of Organic Nitrogen: Relationship with Variations in the Water-Table Within a Floodplain of the River Adour in Southwest France

Brunet¹,

Astin

Dartiguelongue³

et al. 2007

Water Resour Manage

Self Cite

View full text Add to dashboard Cite

The phenomenon of mineralisation of organic nitrogen has been investigated in a section of the floodplain of the River Adour, between Saubusse and Le Vimport, in southwest France. Water quality parameters have been measured at a number of piezometers within the floodplain: nitrate concentrations measured at the sites were generally negligible during the 15-month period studied, significant levels of dissolved ammonium ion were, however, observed during this period. A mechanism of partial mineralisation has been invoked that considers the breakdown of organic nitrogen within the sediments of the floodplain. The level of the water-table is observed to modulate further oxidation of ammonium ion to nitrite and nitrate ion: low groundwater levels allow aerobic oxidation but increased water levels reduce the production of nitrate. Denitrification and uptake by riparian vegetation appear to be combining rapidly to reduce the nitrate as it is produced. The fine particle size of the floodplain sediments permits the storage of considerable quantities of organic nitrogen and the high level of mineralisation of this stock, responding to variations in the water table, provides an explanation for the increasing nitrate concentrations observed in the river channel in recent years. It is estimated that ca. 24% of the sub-surface organic nitrogen is removed each year.

show abstract

An Integrative Conceptualization of Floodplain Storage

Wohl

2021

Reviews of Geophysics

View full text Add to dashboard Cite

Floodplains perform diverse functions, including attenuation of fluxes of water, solutes, and particulate material. Critical details of floodplain storage including magnitude, duration, and spatial distribution are strongly influenced by floodplain biogeochemical processes and biotic communities. Floodplain storage of diverse materials can be conceptualized in the form of a budget that quantifies inputs, outputs, and storage within the floodplain control volume. The floodplain control volume is here defined as bounded on the inner edges by the banks of the active channel(s), on the outer edges by the limit of periodic flooding and the deposition of fluvially transported sediment, on the underside by the extent of hyporheic exchange flows and the floodplain aquifer, and on the upper side by the upper elevation of living vegetation. Fluxes within the floodplain control volume can also change the location, characteristics, and residence time of material in storage. Fluxes, residence time, and quantities of material stored in floodplains can be measured directly; inferred from diverse types of remotely sensed data; or quantitatively estimated using numerical models. Human activities can modify floodplain storage by: hydrologically and/or geomorphically disconnecting channels and floodplains; altering fluxes of water and sediment to the river corridor; and obliterating floodplains through alluvial mining or urbanization. Floodplain restoration can focus on enlarging the functional floodplain, reconnecting the channel and floodplain, restoring natural regimes of water, sediment, and/or large wood, or enhancing the spatial heterogeneity of the channel and floodplain. Each form of floodplain restoration can increase floodplain storage and resilience to disturbances.

show abstract

The role of a floodplain in regulating aquifer recharge during a flood event of the River Adour in southwest France

Cited by 5 publications

References 5 publications

A comparison of sediment deposition in two adjacent floodplains of the River Adour in southwest France

A comparison of sediment deposition in two adjacent floodplains of the River Adour in southwest France

The Mineralisation of Organic Nitrogen: Relationship with Variations in the Water-Table Within a Floodplain of the River Adour in Southwest France

An Integrative Conceptualization of Floodplain Storage

Contact Info

Product

Resources

About