Hydroclimatic variability and relation with flood events (Southern Québec, Canada)

Saint-Laurent, Diane; Mesfioui, Mhamed; Evin, Guillaume

doi:10.1134/s0097807809010047

Cited by 26 publications

(25 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The years 1982, 1990 and 1996, which are characterized by peak discharge, are thus easily located on the mean annual discharge graph. The decrease in discharge recorded around 1960 and 1964 is also clearly identified [36,49]. Furthermore, the years marked by high discharge are generally years with considerable rainfall.…”

Section: Floods and Hydrological Datamentioning

confidence: 87%

“…Sources: [38,39,[42][43][44][45][46] and compilation by the authors. The mean annual discharge of the section of the Saint-François River (the longest time series) located in the study area shows variations over the last decades , with a significant increase in river flow discharge, especially after the 1970s, preceded by a decrease in flow before 1960 [36,49]. The years 1982, 1994 and 1996 have the highest discharge and there is a significant increase in the mean annual discharge in the last few decades, especially from 1970-1998, with a downward trend after 2000 (Figure 2).…”

Section: Floods and Hydrological Datamentioning

confidence: 99%

See 1 more Smart Citation

A Comparison of the Composition and Diversity of Tree Populations along a Hydrological Gradient in Floodplains (Southern Québec, Canada)

Berthelot

Saint-Laurent

Gervais-Beaulac

et al. 2015

Forests

View full text Add to dashboard Cite

With the current climate changes, it is essential to understand the mechanisms that govern floods and flow regimes and their effects on the dynamics of riparian forests. The aim is to assess the effects of new hydrological conditions (increase in flood frequency) on forest stands subject to frequent floods. The sampling sites (total of 94 quadrats) are located in riverine woodlands, and the choice of location corresponds to the boundaries of the flood-risk zones established by official government maps. Our study shows that there are significant differences in the composition and diversity of forest communities following differences in the flood recurrence zones. In the active floodplains (i.e., recurrence interval of 0-20 years), the tree population stands are clearly distinguished from other intermediate flood zones (interval of 20-100 years). Differences are also noted in the structure of the communities, in particular in the frequent flood zones, which are characterized by a low renewal rate, low density and less-diversified forest stands. The frequent floods risk forest stand rejuvenation and creating decline as a result of increased tree mortality and the low renewal OPEN ACCESSForests 2015, 6 930 rate. With the expected increases in the number of flood events in the coming decades, there may be greater tree mortality and a gradual disappearance of the forest communities.

show abstract

Section: Floods and Hydrological Datamentioning

confidence: 87%

Section: Floods and Hydrological Datamentioning

confidence: 99%

A Comparison of the Composition and Diversity of Tree Populations along a Hydrological Gradient in Floodplains (Southern Québec, Canada)

Berthelot

Saint-Laurent

Gervais-Beaulac

et al. 2015

Forests

View full text Add to dashboard Cite

show abstract

“…In short, overly frequent flooding can disrupt pedogenetic processes and hinder biogeochemical cycles and the development of riparian stands (Franklin et al 2009;Hamdan et al 2010). Also, flood frequency leads to fine sediments being continuously deposited on floodplains, and some of these sediments may contain contaminants such as heavy metals and pollutants (Macklin et al 2006;Saint-Laurent et al 2009;Bird et al 2010;Saint-Laurent et al 2010a).…”

Section: Introductionmentioning

confidence: 98%

High-Precision Elevation Model to Evaluate the Spatial Distribution of Soil Organic Carbon in Active Floodplains

et al. 2011

View full text Add to dashboard Cite

This study examines the spatial distribution of soil organic carbon (SOC) and other properties in soils in active floodplains using a high precision digital elevation model (DEM) and geographic information system. Floodplain microtopography may influence wetland hydrology and the physical and chemical properties of soil, thus affecting the balance of plant nutrients in this riverine environment. The selected sites were composed of three floodplains dominated by a forest consisting of silver maple (Acer saccharinum L.) with some green ash (Fraxinus pennsylvanica Marsh.). These floodplains were frequently subject to floods during spring (and also in summer and fall) that create dynamic processes in the formation of alluvial soils and in the structure and composition of floodplain vegetation. The maximum and minimum SOC rates that were obtained ranged from 0.05% to 3.16%, with median values of 0.87%. In addition, no preferential pattern was detected on SOC spatial distribution in floodplain soils even when a high precision digital elevation model was used to define floodplain microtopography. Frequent floods and vertical aggradation maintain the soil in an immature state and cause a depletion of the soil's organic carbon content.

show abstract

“…Recent studies on flood frequency in the south-central Québec study area [28,29,59,60] show an increase in floods over the last three decades, with somewhat more pronounced peaks in the last few years ( Figure 6). This increase in flood events also results in an increase in summer and fall floods, although spring floods are more numerous [58][59][60].…”

Section: Flood Eventsmentioning

confidence: 99%

“…Species that are less demanding in terms of soil nutrients may also benefit from the new conditions. [27][28][29]. Hydrological data are based on flow records from different gauging stations [30].…”

Section: Flood Eventsmentioning

confidence: 99%

Distribution of Soil Organic Carbon in Riparian Forest Soils Affected by Frequent Floods (Southern Québec, Canada)

Saint-Laurent

Gervais-Beaulac

Paradis

et al. 2017

Forests

View full text Add to dashboard Cite

Abstract:Measuring soil organic carbon (SOC) in riparian forest soils affected by floods is crucial for evaluating their concentration and distribution along hydrological gradients (longitudinal and transversal). Hydromorphological factors (e.g., sedimentation vs. erosion, size of floodplain, flood recurrence) may be the cause of major variations in the concentration of organic matter and SOC in soils and could have a direct impact on C levels in soil profiles. For this study, SOC concentrations were assessed in riparian soils collected along transects perpendicular to the riverbanks which cross through inundated and non-inundated zones. Other soil properties (e.g., acidity, nitrogen, texture, bulk density) that may affect the concentration of SOC were also considered. The main purpose of this study was to assess SOC concentrations in soils subjected to flooding with those outside the flood zones, and also measure various soil properties (in surface soils and at various depths ranging from 0 to 100 cm) for each selected area. Across the various areas, SOC shows marked differences in concentration and spatial distribution, with the lowest values found in mineral soils affected by successive floods (recurrence of 0-20 years). SOC at 0-20 cm in depth was significantly lower in active floodplains (Tukey HSD test), with average values of 2.29 ± 1.64% compared to non-inundated soils (3.83 ± 2.22%). The proportion of C stocks calculated in soils (inundated vs. non-inundated zones) was significantly different, with average values of 38.22 ± 10.40 and 79.75 ± 29.47 t·ha −1 , respectively. Flood frequency appears to be a key factor in understanding the low SOC concentrations in floodplain soils subjected to high flood recurrence (0-20 years).

show abstract

Hydroclimatic variability and relation with flood events (Southern Québec, Canada)

Cited by 26 publications

References 32 publications

A Comparison of the Composition and Diversity of Tree Populations along a Hydrological Gradient in Floodplains (Southern Québec, Canada)

A Comparison of the Composition and Diversity of Tree Populations along a Hydrological Gradient in Floodplains (Southern Québec, Canada)

High-Precision Elevation Model to Evaluate the Spatial Distribution of Soil Organic Carbon in Active Floodplains

Distribution of Soil Organic Carbon in Riparian Forest Soils Affected by Frequent Floods (Southern Québec, Canada)

Contact Info

Product

Resources

About