On River‐Aquifer Exchange Flow With Irregular and Semipervious Bank

Xian, Yang; Jin, Menggui; Zhan, Hongbin; Liang, Xing

doi:10.1029/2020wr028984

Cited by 4 publications

(2 citation statements)

References 54 publications

(175 reference statements)

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“…Alternatively, if strong correlations are found between measured features and the RBS parameters, field measurements could be converted so that they can be used in the current model structure. One prospective research approach would be to calibrate the RBS model to a series of virtual catchments modelled with high resolution process‐based models, each featuring different physical properties and geometries (e.g., Doble, Crosbie, et al, 2012; Xian et al, 2021). This would further demonstrate that the RBS can replicate such processes, but also could provide a mapping between RBS and more physics‐based parameters.…”

Section: Discussionmentioning

confidence: 99%

“…An intended feature of the RBS model that relates to scale and heterogeneity is that it is not driven by explicit geometries. Although geometries have shown to play important roles in river‐aquifer exchanges (Doble, Brunner, et al, 2012; Xian et al, 2021), often in reality, very little is known about the shape of river cross‐sections and groundwater/soil stores, which are likely to be very highly variable when considering river reaches many hundreds of kilometres long. LiDAR data may be useful in determining river cross‐sections for ephemeral streams.…”

Section: Discussionmentioning

confidence: 99%

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Modelling daily transmission losses in basin‐scale river system models under changing hydrological regimes

Kim

Hughes

Marshall

et al. 2022

Hydrological Processes

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With rising concerns for water security and increasing interest in water resource development, accounting for river transmission losses in arid/semi-arid region water budgets is a crucial yet challenging task. Transmission losses are usually confounded with many different processes and exacerbated by hydrologic and climatic nonstationarity. A common deficiency in existing basin-scale river system loss models is the poor representation of dynamic river losses into groundwater. To address this, a new conceptual model was developed to represent relevant river processes including rainfall to runoff transformation, river loss/gain to groundwater, river rainfall/ evaporation and routing on a reach-by-reach basis. A critical process of the model is the exchange of water between the river and a groundwater store, called the river bed/bank store. The exchange to groundwater typically occurs with relatively high river volumes. Conversely, the store can discharge water back to the river when river volumes are relatively low. The model is designed to be transposable between different time-periods, such as pre-and post-development scenarios, assuming sufficient data exist during calibration. Using explicit Bayesian formulations, calibrations were performed against observed streamflow and remotely sensed evapotranspiration data. The new loss model was investigated using a test case in the Cooper Creek, Australia. The model performed overall better than a benchmark (flow vs. loss) model in a range of calibration/validation metrics. The new model provides river state and flux terms typically not available in basin-scale models, and thus, is expected to be valuable during calibration/validation by allowing the use of alternative observed data types, for example, actual evapotranspiration or groundwater observations. Moreover, these extra terms could be very beneficial to water budget and ecological assessment studies.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%