Improving hydrologic model to predict the effect of snowpack and soil temperature on carbon dioxide emission in the cold region peatlands

Melaku, Nigus Demelash; Meshesha, Tesfa Worku

doi:10.1016/j.jhydrol.2020.124939

Cited by 17 publications

(4 citation statements)

References 48 publications

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“…The SWAT has been used for simulating the N cycle in soils and aquifer at shallow depth 51 , 52 . In the water and soil, the N processes is dynamic.…”

Section: Methodsmentioning

confidence: 99%

“…Organic transport of N with sediment is obtained as a concentration function proposed by 56 and later applied by 57 to the separated runoff events. Estimating the daily organic N runoff loss is on the basis of concentration of organic N in the top soil layer, the sediment yield and the enrichment ratio of the organic nitrogen in sediment to organic N in soil layer 51 see Fig. 2 ).…”

Section: Methodsmentioning

confidence: 99%

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Modelling groundwater quality of the Athabasca River Basin in the subarctic region using a modified SWAT model

Meshesha

Wang

Melaku

et al. 2021

Sci Rep

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Groundwater is a vital resource for human welfare. However, due to various factors, groundwater pollution is one of the main environmental concerns. Yet, it is challenging to simulate groundwater quality dynamics due to the insufficient representation of nutrient percolation processes in the soil and Water Assessment Tool model. The objectives of this study were extending the SWAT module to predict groundwater quality. The results proved a linear relationship between observed and calculated groundwater quality with coefficient of determination (R2), Nash–Sutcliffe efficiency (NSE), percent bias (PBIAS) values in the satisfied ranges. While the values of R2, NSE and PBIAS were 0.69, 0.65, and 2.68 during nitrate calibration, they were 0.85, 0.85 and 5.44, respectively during nitrate validation. Whereas the values of R2, NSE and PBIAS were 0.59, 0.37, and − 2.21 during total dissolved solid (TDS) calibration and they were 0.81, 0.80, 7.5 during the validation. The results showed that the nitrate and TDS concentrations in groundwater might change with varying surface water quality. This indicated the requirement for designing adaptive management scenarios. Hence, the extended SWAT model could be a powerful tool for future regional to global scale modelling of nutrient loads and effective surface and groundwater management.

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“…The SWAT has been used for simulating the N cycle in soils and aquifer at shallow depth 51 , 52 . In the water and soil, the N processes is dynamic.…”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Modelling groundwater quality of the Athabasca River Basin in the subarctic region using a modified SWAT model

Meshesha

Wang

Melaku

et al. 2021

Sci Rep

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“…Changes in available radiation (Figure 4) and snowpack depth also affected soil temperature so that the Ts is on average higher on the line compared with the adjacent undisturbed forest in these cold months (Table 2 and Figure 10). Soil temperature is a significant driver of heterotrophic microbial activity in peatlands (Melaku et al, 2020). The soil freezing and thawing cycle is closely related to the variation in soil temperature that influences carbon dioxide emissions (Hao, 2015; Rafat et al, 2022).…”

Section: Discussionmentioning

confidence: 99%

An initial assessment of winter microclimatic conditions in response to seismic line disturbance in a forested peatland

Bayatvarkeshi,

Ketcheson,

Weiland

et al. 2024

Hydrological Processes

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Linear disturbances are widespread in the boreal region of Alberta, Canada. Despite their ubiquitous nature, little is known about their influence on over‐winter meteorological conditions and if and how they alter the snowpack and soil temperature profiles through altered energy and water balances in the wintertime. The presence of seismic lines could affect hydrological processes in both the wintertime and warm months. This will then affect plant communities and carbon cycling on these disturbances. Thus, understanding the effect of seismic lines on meteorological conditions during cold weather conditions will be important to better understand how they alter ecosystem function. Accordingly, this study aims to assess the effect of two seismic lines with different orientations created for petroleum resource exploration on energy and meteorological variables by comparing them with the near surface conditions in the adjacent wooded peatland area from October 2022 to April 2023. We observed 1.8 times higher photon flux density of photosynthetically active radiation on the linear disturbances than in the understory of the undisturbed locations and a greater negative net radiation on the seismic lines compared with that observed off the lines. Furthermore, the average wind speed on the seismic lines were eight and seven times higher at the east–west and south–north oriented seismic lines than the adjacent wooded peatland, respectively. Together, these changes resulted in a denser snowpack on the seismic line and overall higher snow water equivalent in the pre‐melt snowpack. This provided insulation for the soil, and soil temperature on the lines stayed above freezing 7 days longer at the east–west oriented site or retained non‐freezing condition at the south–north oriented site in the upper 15 cm. This would result in more microbial activity and potential higher over‐winter carbon releases.

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“…SWAT model can simulate the N2 cycle of soil profile and in the aquifer at shallow depth [44,45]. In the water and soil, the condition of N2 is very exists in a various form of dynamics.…”

Section: Soil and Water Assessment Tool Applicationmentioning

confidence: 99%

Groundwater Modelling Quality in the Cold Region of the Athabasca River Basin

Tw¹,

Wang²,

Demelash³

et al. 2020

Preprint

Self Cite

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Groundwater is a vital resource for human welfare. However, due to various factors, groundwater pollution is one of the main environmental concerns facing. Yet, it is challenging to simulate groundwater quality dynamics due to the insufficient representation of nutrient percolation processes in the soil and Water Assessment Tool model. The objectives of this study were extending the SWAT module to predict groundwater quality. The results proved a linear relationship between observed and calculated groundwater quality considering No3 and TDS with R2, NSE and PBIAS values in the satisfied ranges, albeit underestimation and overestimation were observed due to limited data availability. These results highlight that nitrate and TDS concentrations and variability in groundwater may used as a tool in surface water quality that have to be assumed for designing adaptive management scenarios. Hence, extended SWAT model could be a powerful tool for future regional to global scale modelling of nutrient loads supporting effective surface and groundwater management.

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Improving hydrologic model to predict the effect of snowpack and soil temperature on carbon dioxide emission in the cold region peatlands

Cited by 17 publications

References 48 publications

Modelling groundwater quality of the Athabasca River Basin in the subarctic region using a modified SWAT model

Modelling groundwater quality of the Athabasca River Basin in the subarctic region using a modified SWAT model

An initial assessment of winter microclimatic conditions in response to seismic line disturbance in a forested peatland

Groundwater Modelling Quality in the Cold Region of the Athabasca River Basin

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