Comparison of annual flood characteristics in four watersheds in relation to the wetland surface areas (Southern Quebec, Canada)

Assani, Ali A.

doi:10.1007/s11273-022-09886-0

Cited by 4 publications

(4 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a recent study, Assani ( 2022a ) demonstrated that the magnitude of maximum daily spring flows from snowmelt are strongly negatively correlated with the area of wetlands and other water bodies due to the surface storage of runoff water fed by this snowmelt. In the scientific literature, this negative correlation has always been interpreted within the framework of the “sponge effect” concept (e.g., Acreman and Holden 2013 ; Lane et al 2018 ) even in southern Quebec (e.g., Fossey and Rousseau 2016a , b ; Fossey et al 2015 ; Blanchette et al 2019 ).…”

Section: Discussionmentioning

confidence: 99%

“…Data on physiographic characteristics and type of land use and land cover were measured by the Glaciolab laboratory of the University of Quebec at Trois-Rivières according to the methodology already described in detail by Kinnard et al ( 2022 ) in particular. With regard to the wetland data, they were supplemented by those extracted from the database of Belzile et al ( 1997 ) whose methodology has been described in detail by Assani ( 2022a ) in particular. It is important to specify that the surface areas of wetlands include those of other types of water bodies and small lakes.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Analysis of the impacts of climate change, physiographic factors and land use/cover on the spatiotemporal variability of seasonal daily mean flows in southern Quebec (Canada)

Assani

2024

Appl Water Sci

Self Cite

View full text Add to dashboard Cite

The objective of this study is to compare the spatiotemporal variability of seasonal daily mean flows measured in 17 watersheds, grouped into three homogeneous hydroclimatic regions, during the period 1930–2023 in southern Quebec. With regard to spatial variability, unlike extreme daily flows, seasonal daily mean flows are very poorly correlated with physiographic factors and land use and land cover. In fall, they are not correlated with any physiographic or climatic factor. In winter, they are positively correlated with the rainfall and winter daily mean maximum temperatures. In spring, they are strongly correlated positively with the snowfall but negatively with the spring daily mean maximum temperatures. However, in summer, they are better correlated with forest area and, to a lesser extent, with the rainfall. As for their temporal variability, the application of six different statistical tests revealed a general increase in daily mean flows in winter due to early snowmelt and increased rainfall in fall. In summer, flows decreased significantly in the snowiest hydroclimatic region on the south shore due to the decrease in the snowfall. In spring, no significant change in flows was globally observed in the three hydroclimatic regions despite the decrease in the snowfall due to the increase in the rainfall. In fall, flows increased significantly south of 47°N on both shores due to the increase in the rainfall. This study demonstrates that, unlike extreme flows, the temporal variability of seasonal daily average flows is exclusively influenced by climatic variables in southern Quebec. Due to this influence, seasonal daily mean flows thus appear to be the best indicator for monitoring the impacts of changes in precipitation regimes and seasonal temperatures on river flows in southern Quebec.

show abstract

Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Analysis of the impacts of climate change, physiographic factors and land use/cover on the spatiotemporal variability of seasonal daily mean flows in southern Quebec (Canada)

Assani

2024

Appl Water Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The presence of larger areas of wetlands and other types of water bodies in the watersheds of the north shore thus explains the low mean flow values in this southwestern hydroclimatic region (<60 L/s/km 2 ). It is important to emphasize that this decrease in magnitude is due to the surface storage of runoff water by wetlands and other water bodies (surface water storage concept) (Assani, 2022a(Assani, , 2022b rather than the absorption of this runoff water according to the classic "sponge effect concept" (see Bullock & Acreman, 2003).…”

Section: Riversmentioning

confidence: 99%

Spatiotemporal variability of fall daily maximum flows in southern Quebec (Canada) from 1930 to 2018

Assani

2024

J Flood Risk Management

Self Cite

View full text Add to dashboard Cite

Quebec is experiencing a significant increase in summer and fall temperatures and rainfall. This study compares the spatiotemporal variability of maximum daily flows generated by rainfall during the fall season (September–December) in relation to this climatic change and physiographic and land use factors. Analysis of the spatial variability of these maximum flows measured from 1930 to 2018 in 17 watersheds revealed that the magnitude of flows is approximately twice as low on the north shore as it is on the south shore south of 47° N. This difference is explained by three main factors: wetlands (negative correlation) and agricultural (positive correlation) surface area, and summer–fall total precipitation (positive correlation). As for the temporal variability of flows, the different Mann–Kendall statistical tests showed a significant increase in flows due to increased rainfall. The increase of flows was more widespread on the north shore than on the south because the storage capacity of wetlands and other water bodies does not change over time to store excess rainfall. On the south shore, the increase in flows over time is limited due to the significant reduction in agricultural areas since the modernization of agriculture. This reduction favored infiltration to the detriment of runoff.

show abstract

“…Thus, the supply of groundwater by the infiltration process is limited despite the increase in the amount of rainfall. In this regard, Assani [56,64,66] had clearly demonstrated that these wetlands impact surface runoff more than infiltration. It follows that the analysis of the temporal variability of flood flows generated by snowmelt and/or rain in this region has shown a general increase in flows over time due to the increase in rainfall unlike the other two hydroclimatic regions.…”

Section: International Journal Of Environmental Sciences and Natural ...mentioning

confidence: 99%

Extreme Hydrological Drought in Southern Quebec (Canada): Natural and Anthropogenic Factors Interactions on its Spatio-Temporal Variability

Assani

2023

IJESNR

View full text Add to dashboard Cite

Despite the relatively humid character of their climate, many cold temperate regions face increasingly extreme hydrological droughts that turn rivers from steady to intermittent. The spatio-temporal variability of these droughts depends on the interaction of natural and anthropogenic factors. The objective of this study is to determine these factors in southern Quebec (Canada). The annual daily minimum flows (1-day) of 17 rivers, grouped into three homogeneous hydroclimatic regions, were analyzed during the period 1930-2019. With regard to spatial variability, the comparison of the flow averages by means of ANOVA and Kruskal-Wallis tests revealed that the flows of rivers of the north shore (southwestern hydroclimatic region) are on average twice as higher than those of the southern shore (Southeastern and Eastern hydroclimatic regions). Linear correlation analysis revealed that these flows are negatively correlated with agricultural areas and snowfall but positively with wetlands areas and watershed mean slopes. As for temporal variability, the southeastern region river flows, the most agricultural, have increased significantly over time due to the significant decrease in agricultural areas and the increase in the amount of rainfall. In the eastern hydroclimatic region, flows have generally decreased due to the significant decrease in the autumn snowfall. Finally, in the southwestern hydroclimatic region, the less agricultural, overall, no significant change in flows occurred, probably due to the low amount of fall snowfall, the decrease in which was offset by the increase in rainfall. This study reveals that the eastern hydroclimatic region is the most vulnerable to the decrease in the amount of snow, which is the main source of low flows in Quebec. Finally, few significant correlations were observed between climatic indices and flows.

show abstract

Comparison of annual flood characteristics in four watersheds in relation to the wetland surface areas (Southern Quebec, Canada)

Cited by 4 publications

References 45 publications

Analysis of the impacts of climate change, physiographic factors and land use/cover on the spatiotemporal variability of seasonal daily mean flows in southern Quebec (Canada)

Analysis of the impacts of climate change, physiographic factors and land use/cover on the spatiotemporal variability of seasonal daily mean flows in southern Quebec (Canada)

Spatiotemporal variability of fall daily maximum flows in southern Quebec (Canada) from 1930 to 2018

Extreme Hydrological Drought in Southern Quebec (Canada): Natural and Anthropogenic Factors Interactions on its Spatio-Temporal Variability

Contact Info

Product

Resources

About