| Title | A novel method for cold region streamflow hydrograph separation using GRACE satellite observations |
| |
| Author | Wang, S ; Li, J;
Russell, H A J |
| Source | Hydrology and Earth System Sciences 2020 p. 1-22, https://doi.org/10.5194/hess-2020-524  Open Access |
| Image |  |
| Year | 2020 |
| Alt Series | Natural Resources Canada, Contribution Series 20210072 |
| Publisher | Copernicus Publications |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf |
| Province | Ontario |
| Lat/Long WENS | -94.0000 -81.0000 54.0000 47.0000 |
| Subjects | geophysics; hydrogeology; Science and Technology; Nature and Environment; hydrography; flow regimes; remote sensing; satellite imagery; modelling; Gravity Recovery and Climate Experiment
(GRACE) |
| Illustrations | location maps; charts; tables; cross-plots |
| Program | Climate
Change Geoscience Extreme Events |
| Program | Canada Centre for Remote Sensing Remote Sensing Science Program - Management |
| Released | 2020 12 01 |
| Abstract | Streamflow hydrograph analysis has long been used for separating streamflow into baseflow and surface-runoff components, providing critical information for studies in hydrology, climate and water
resources. Defects known with established methods include the lack of physics and arbitrary choice of separation parameters, problems in identifying snowmelt runoff, and limitations on watershed size and hydrogeological conditions. In this study, a
GRACE-based model was developed to address these weaknesses and improve hydrograph separation. The model is physically based and does not require a priori parametrisation. The new model was compared with six hydrograph separation methods provided
with the U.S. Geological Survey Groundwater Toolbox. The results demonstrated robust estimate by the new model particularly in filtering out the bias of snowmelt runoff in baseflow estimate. This new model is specifically suitable for applications
over large watersheds which is complementary to the traditional methods that are limited by watershed size. The output from the model also includes estimates for watershed hydraulic conductivity and drainable water storage, which are useful
parameters in evaluating aquifer properties, calibrating and validating hydrological and climate models, and assessing regional water resources. |
| Summary | (Plain Language Summary, not published)
Separating river flow into baseflow and surface-runoff components provides useful information for hydrology, climate and water resources studies, but
traditional methods have critical limitations in the lack of physics, identifying snowmelt runoff, and watershed size. This study developed a novel model using the GRACE satellite observations to address these limitations. The results show that the
model largely improved the hydrograph analysis particularly in filtering out the bias of snowmelt runoff in baseflow estimate. This new model filled the gap of traditional methods in hydrograph separation for large watersheds. The output from this
study also includes estimates for watershed hydraulic conductivity and drainable water storage, which are important in evaluating aquifer properties, calibrating and validating hydrological and climate models, and assessing regional water
resources. |
| GEOSCAN ID | 328325 |
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