River connectivity and road crossing effects on floodplain vegetation of the upper Columbia River, Canada

Carli, Chris; Bayley, Suzanne E.

doi:10.1080/11956860.2015.1121705

Cited by 8 publications

(5 citation statements)

References 36 publications

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“…Most researchers photointerpret these images to describe riparian vegetation features. This method is long-standing, but remains a relevant and effective approach to map riparian vegetation over small watersheds or along dozens (more rarely hundreds) of km of rivers (Jansen and Backx, 1998;Matsuura and Suzuki, 2013;Carli and Bayley, 2015;González del Tánago et al, 2015;Solins et al, 2018). However, photointerpretation of hundreds of km of river can become tedious.…”

Section: Use Of Airplanes and Satellites At The Segment And Subregional Scalesmentioning

confidence: 99%

Using remote sensing to characterize riparian vegetation: A review of available tools and perspectives for managers

Huylenbroeck

Laslier²,

Dufour³

et al. 2020

Journal of Environmental Management

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Riparian vegetation is a central component of the hydrosystem. As such, it is often subject to management practices that aim to influence its ecological, hydraulic or hydrological functions.Remote sensing has the potential to improve knowledge and management of riparian vegetation by providing cost-effective and spatially continuous data over wide extents. The objectives of this review were twofold: to provide an overview of the use of remote sensing in riparian vegetation studies and to discuss the transferability of remote sensing tools from scientists to managers. We systematically reviewed the scientific literature (428 articles) to identify the objectives and remote sensing data used to characterize riparian vegetation. Overall, results highlight a strong relationship between the tools used, the features of riparian vegetation extracted and the mapping extent. Very high-resolution data are rarely used for rivers longer than than 100 km, especially when mapping species composition. Multi-temporality is central in remote sensing riparian studies, but authors use only aerial photographs and relatively coarse resolution satellite images for diachronic analyses. Some remote sensing approaches have reached an operational level and are now used for management purposes. Overall, new opportunities will arise with the increased availability of very high-resolution data in understudied or data-scarce regions, for large extents and as time series. To transfer remote sensing approaches to riparian managers, we suggest mutualizing achievements by producting open-access and robust tools. These tools will then have to be adapted to each specific project, in collaboration with managers.

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Section: Use Of Airplanes and Satellites At The Segment And Subregional Scalesmentioning

confidence: 99%

Using remote sensing to characterize riparian vegetation: A review of available tools and perspectives for managers

Huylenbroeck

Laslier²,

Dufour³

et al. 2020

Journal of Environmental Management

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“…1). The region drains an upstream area of ∼ 6660 km 2 ; has historical averages available for air temperature (3 °C), precipitation (800 mm yr −1 ; MacDonald and Chernos, 2020), wind speed (∼ 1 m s −1 ), and relative humidity (55 %;Hersbach et al, 2020); and the annual average peak flow is 512 m 3 s −1 (Carli and Bayley, 2015).…”

Section: Study Areamentioning

confidence: 99%

“…The UCRW has connected and non-connected wetlands, with both types experiencing variation in water levels and areal extent as the river rises and falls; however, more isolated wetland waterbodies may suffer permanent level and extent changes as a result of overbank flooding, slow drainage, loss to evapotranspiration (MacDonald and Chernos, 2020;Carli and Bayley, 2015), and climate change (Bürger et al, 2011;Carver, 2017;Jost et al, 2012). The aforementioned effects have primarily been seen between (1903-1928, 1929-1953, 1954-1978, 1979-2003, and 2004-2022).…”

Section: Classification Evaluationmentioning

confidence: 99%

Multi-decadal floodplain classification and trend analysis in the Upper Columbia River valley, British Columbia

Rodrigues,

Hopkinson,

Chasmer

et al. 2024

Hydrol. Earth Syst. Sci.

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Abstract. Floodplain wetland ecosystems experience significant seasonal water fluctuation over the year, resulting in a dynamic hydroperiod, with a range of vegetation community responses. This paper assesses trends and changes in land cover and hydroclimatological variables, including air temperature, river discharge, and water level in the Upper Columbia River Wetlands (UCRW), British Columbia, Canada. A land cover classification time series from 1984 to 2022 was generated from the Landsat image archive using a random forest algorithm. Peak river flow timing, duration, and anomalies were examined to evaluate temporal coincidence with observed land cover trends. The land cover classifier used to segment changes in wetland area and open water performed well (kappa of 0.82). Over the last 4 decades, observed river discharge and air temperature have increased, precipitation has decreased, the timing of peak flow is earlier, and the flow duration has been reduced. The frequency of both high-discharge events and dry years have increased, indicating a shift towards more extreme floodplain flow behavior. These hydrometeorological changes are associated with a shift in the timing of snowmelt, from April to mid-May, and with seasonal changes in the vegetative communities over the 39-year period. Thus, woody shrubs (+6 % to +12 %) have expanded as they gradually replaced marsh and wet-meadow land covers with a reduction in open-water area. This suggests that increasing temperatures have already impacted the regional hydrology, wetland hydroperiod, and floodplain land cover in the Upper Columbia River valley. Overall, there is substantial variation in seasonal and annual land cover, reflecting the dynamic nature of floodplain wetlands, but the results show that the wetlands are drying out with increasing areas of woody/shrub habitat and loss of aquatic habitat. The results suggest that floodplain wetlands, particularly marsh and open-water habitats, are vulnerable to climatic and hydrological changes that could further reduce their areal extent in the future.

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“…This study focusses on a ~ 120 km stretch of the Upper Columbia River floodplain (188 km²) between Donald and Invermere within the Rocky Mountain Trench, British Columbia, Canada (Figure 1). The region drains an upstream area of ~6,660 km², presents historical averages of: air temperature 3ºC, precipitation 800 mm.year -1 (MacDonald and Chernos, 2020), wind speed ~1 m.s -1 , relative humidity 55% (Hersbach et al, 2020) and annual average peak flow of 512 m³.s -1 (Carli and Bayley, 2015).…”

Section: Study Areamentioning

confidence: 99%

“…This results in a highly dynamic hydroperiod that influences vegetation communities in a wide range of ways. The UCRW has connected and non-connected wetlands, with both types experiencing variation in water levels and areal extent as the river rises and falls; however, more isolated wetland water bodies may suffer permanent level and extent changes as a result of overbank flooding, slow drainage, loss to evapotranspiration (MacDonald and Chernos, 2020; Carli and Bayley, 2015), and climate change (Bürger et al, 2011;Carver, 2017;Jost et al, 2012). The aforementioned effects have primarily been seen between April and mid-May, and August to mid-September, when open water is shrinking, and woody/shrub vegetation is encroaching within the floodplain.…”

Section: In Addition Based On the High Correlation Between River Disc...mentioning

confidence: 99%

Multi-decadal Floodplain Classification and Trend Analysis in the Upper Columbia River Valley, British Columbia

Rodrigues,

Hopkinson,

Chasmer

et al. 2023

Preprint

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Abstract. Floodplain wetland ecosystems experience significant seasonal water fluctuation over the year, resulting in a dynamic hydroperiod, with a range of vegetation community responses. This paper assesses trends and changes in landcover and hydro-climatological variables, including air temperature, river discharge, and water level in the Upper Columbia River Wetlands (UCRW), British Columbia, Canada. A time series landcover classification from the Landsat image archive was generated using a Random Forest algorithm from 1984 to 2022. Peak river flow timing, duration, and anomalies were examined to evaluate temporal coincidence with observed landcover trends. The land cover classifier used to segment changes in wetland area and open water performed well (Kappa = 0.82). Over the last four decades, observed river discharge and air temperature have increased, precipitation has decreased, the timing of peak flow is earlier, and flow duration has been reduced. The frequency of both high discharge events and dry years have increased, indicating a shift towards more extreme floodplain flow behavior. These hydrometeorological changes are associated with a shift in the timing of snow melt from April to mid-May and are associated with seasonal changes in the vegetative communities over the 39-year period. The area of woody shrub landcover has increased in the spring (April to mid-May), peak flow period (late-May to July) and early fall (August to mid-September) by +6 % to +12 % since 1984. In the spring and early fall, the area of open water has decreased –3 % to –6 % since 1984, while it has increased 3 % during the peak flow period. The area of marsh land cover (mostly bulrush and cattails) has declined in every season by –29 % in spring, –19 % in the peak flow period and –5 % in early fall. These findings suggest that increasing temperatures have already impacted regional hydrology, wetland hydroperiod and floodplain landcover in the Upper Columbia Valley in Canada. Overall, there is substantial variation in seasonal and annual land cover reflecting the dynamic nature of floodplain wetlands, but the results show that the wetlands are drying out with increasing the areas of woody/shrubby habitat and loss of aquatic habitat. The results suggest that floodplain wetlands, particularly marsh and open water habitats are vulnerable to climatic and hydrological changes that could further reduce their areal extent in the future.

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River connectivity and road crossing effects on floodplain vegetation of the upper Columbia River, Canada

Cited by 8 publications

References 36 publications

Using remote sensing to characterize riparian vegetation: A review of available tools and perspectives for managers

Using remote sensing to characterize riparian vegetation: A review of available tools and perspectives for managers

Multi-decadal floodplain classification and trend analysis in the Upper Columbia River valley, British Columbia

Multi-decadal Floodplain Classification and Trend Analysis in the Upper Columbia River Valley, British Columbia

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