Evaluation of typical methods for baseflow separation in the contiguous United States

Xie, Jialin; Liu, Xiaomang; Wang, Kaiwen; Yang, Tiantian; Liang, Kang; Liu, Changming

doi:10.1016/j.jhydrol.2020.124628

Cited by 69 publications

(49 citation statements)

References 56 publications

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“…The baseflow regime was taken as representative of the overall behavior of groundwater contribution over the SFB. Digital filters have been widely used to estimate the contribution of groundwater to streamflow [42,51] and have been shown suitable in comparison to other approaches over large spatial scales [52][53][54]. We applied two digital filters to decompose Qt into Qb and Qq components at daily resolution, and used the average value of Qb of the two filters.…”

Section: Partitioning Of Streamflow Into Baseflow and Quickflowmentioning

confidence: 99%

Significant baseflow reduction in the Sao Francisco River Basin

Lucas¹,

Kublik²,

Rodrigues³

et al. 2020

Preprint

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Water scarcity is a key challenge to global development. In Brazil, the Sao Francisco River Basin (SFB) has experienced water scarcity problems because of decreasing streamflow and increasing demands from multiple sectors. However, the drivers of decreased streamflow, particularly the potential role of surface-groundwater interaction, have not been yet investigated. Here, we assess long-term trends in baseflow, quickflow, and streamflow of the SFB during 1980–2015 and constrain the most likely drivers of observed decreases through trend analysis of precipitation (P), evapotranspiration (ET), and terrestrial water storage change (TWS). We found that over 82% of the observed decrease in streamflow can be attributed to a significant decreasing baseflow trend (< -20 m3 s-1 y-1) along the SFR with spatial agreement between decreased baseflow, increased ET, and irrigated agricultural land. We also noted a decrease in TWS across the SFB with trends exceeding -20 mm y-1. Overall, our findings indicate that decreasing groundwater contributions (i.e., baseflow) is providing the observed reduction in total SFR flow. A lack of significant P trends indicates that only P variability likely has not caused the observed baseflow reduction, mainly in the Middle and Sub-middle SFB. Therefore, groundwater and surface withdrawals may be likely a driver of water scarcity over the SFB.

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Section: Partitioning Of Streamflow Into Baseflow and Quickflowmentioning

confidence: 99%

Significant baseflow reduction in the Sao Francisco River Basin

Lucas¹,

Kublik²,

Rodrigues³

et al. 2020

Preprint

View full text Add to dashboard Cite

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“…The one‐parameter digital filter method first proposed by Lyne and Hollick (1979) was used because it is consistent with what was used in Ayers et al . (2020) and was validated in other studies (Arnold and Allen, 1999; Ladson et al ., 2013; Zhang et al ., 2017; Xie et al ., 2020). This method uses a single baseflow filter parameter, the recession constant ( α ), and represents the rate that streamflow declines after a precipitation event.…”

Section: Methodsmentioning

confidence: 99%

Projected changes in monthly baseflow across the U.S. Midwest

Ayers

Villarini

Schilling

et al. 2021

Intl Journal of Climatology

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Baseflow is an essential water resource because it is the groundwater discharged to streams and represents long‐term storage. Understanding its future changes is a major concern for water supply and ecosystem health. This study examines the impacts of climate and agriculture on monthly baseflow in the U.S. Midwest through the end of the 21st century. We use a statistical approach to evaluate three scenarios. The first scenario is based on downscaled and bias corrected global climate model (GCM) outputs and the representative concentration pathway (RCP) 8.5, and agriculture is held constant (and equal to the mean from 2013 to 2019). In the next two scenarios, climate is held constant (2010–2019) to isolate the impact of agriculture on baseflow. In terms of agricultural changes, we consider scenarios representative of either increases or decreases with respect to the production of corn and soybeans. Changes in the climate system point to increases in baseflow that are likely a result of increased precipitation and antecedent wetness. Seasonally, warmer temperature in the winter and spring (i.e., February to July) is expected to cause increasing trends in baseflow. Changes in land use showed that agriculture would either mitigate the impact of climate change or possibly amplify it. Expanding corn and soybean areas would increase baseflow in the Corn Belt region. On the other hand, converting land back to perennial vegetation would decrease baseflow throughout the entire year. Despite its simplicity, this study can provide basic information to understand where to expect adverse effects on baseflow and thus improve land management practices in those areas.

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“…When b(t)>Q(t), then b(t) is replaced by Q(t). The parameters that were selected for the separation were BFI mx = 0.8 and a = 0.95 (as recommended by Xie et al 51 ). These parameters were kept constant in all catchments, which also become a source of uncertainty.…”

Section: Declarations Methodsmentioning

confidence: 99%

Global carbon sequestration through continental chemical weathering in a climatic change context

Lechuga-Crespo

Sauvage

vanVliet

et al. 2021

Preprint

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Here, we simulate carbon dioxide (CO2) sequestration in 300 major world river basins (about 70% of global surface area) through carbonates dissolution and silicate hydrolysis. For each river basin, the daily timescale impacts under both the RCP 2.6 and RCP 8.5 climate scenarios were assessed relative to a historic baseline (1969-1999) using a cascade of models accounting for the hydrological evolution under climate change scenarios. Here we show that global temporal evolution of the CO2 uptake presents a general increase in the annual amount of CO2 consumed from 0.247 Pg C·y-1 to 0.261 and 0.273 Pg C·y-1, respectively for RCP 2.6 and RCP 8.5. Besides, despite showing a general increase for the global daily carbon sequestration, both climate scenarios present a decrease between June and August. Such projected changes have been mapped and evaluated against changes in hydrology, identifying hot spots and moments for the annual and seasonal periods.

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Evaluation of typical methods for baseflow separation in the contiguous United States

Cited by 69 publications

References 56 publications

Significant baseflow reduction in the Sao Francisco River Basin

Significant baseflow reduction in the Sao Francisco River Basin

Projected changes in monthly baseflow across the U.S. Midwest

Global carbon sequestration through continental chemical weathering in a climatic change context

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