A tale of two isotopes: differences in hydrograph separation for a runoff event when using δD versus δ18O

2009 ◽  
Vol 23 (14) ◽  
pp. 2095-2101 ◽  
Author(s):  
Steve W. Lyon ◽  
Sharon L. E. Desilets ◽  
Peter A. Troch
Keyword(s):  
Hydrograph Separation ◽  
Runoff Event

scholarly journals HYDROGRAPH SEPARATION OF THE AMAZON RIVER USING 18O AS AN ISOTOPIC TRACER

1997 ◽  
Vol 54 (3) ◽  
pp. 167-173 ◽  
Author(s):  
J. MORTATTI ◽  
J.M. MORAES ◽  
J.C. RODRIGUES, JR ◽  
R.L. VICTORIA ◽  
L.A. MARTINELLI
Keyword(s):  
Surface Runoff ◽  
River Flow ◽  
Amazon River ◽  
Hydrograph Separation ◽  
Isotopic Tracer ◽  
River Waters ◽  
Runoff Event ◽  
The Mean ◽  
Isotopic Separation ◽  
Separation Model

The 18O content of rain and river waters was used as an isotopic tracer in order to carry out the hydrograph separation of the Amazon river, during the 1973-1974 hydrological years, and to estimate the contributions of the surface runoff (event water) and baseflow (pre-event water) components to the total river flow. The average surface runoff and baseflow contributions were 30.3 and 69.7% respectively. At peak discharge, the mean contribution of the baseflow was about 57%. The results of the isotopic separation model were compared with the filter-separation autoregressive method, showing similar behavior and magnitude.

scholarly journals Estimating surface runoff and groundwater recharge in an urban catchment using a water balance approach

2021 ◽  
Vol 29 (7) ◽  
pp. 2411-2428
Author(s):  
Robin K. Weatherl ◽  
Maria J. Henao Salgado ◽  
Maximilian Ramgraber ◽  
Christian Moeck ◽  
Mario Schirmer
Keyword(s):  
Soil Moisture ◽  
Water Balance ◽  
Groundwater Recharge ◽  
Surface Runoff ◽  
Urban Areas ◽  
Water Cycle ◽  
Land Use Changes ◽  
Curve Number ◽  
Hydrograph Separation ◽  
Balance Approach

AbstractLand-use changes often have significant impact on the water cycle, including changing groundwater/surface-water interactions, modifying groundwater recharge zones, and increasing risk of contamination. Surface runoff in particular is significantly impacted by land cover. As surface runoff can act as a carrier for contaminants found at the surface, it is important to characterize runoff dynamics in anthropogenic environments. In this study, the relationship between surface runoff and groundwater recharge in urban areas is explored using a top-down water balance approach. Two empirical models were used to estimate runoff: (1) an updated, advanced method based on curve number, followed by (2) bivariate hydrograph separation. Modifications were added to each method in an attempt to better capture continuous soil-moisture processes and explicitly account for runoff from impervious surfaces. Differences between the resulting runoff estimates shed light on the complexity of the rainfall–runoff relationship, and highlight the importance of understanding soil-moisture dynamics and their control on hydro(geo)logical responses. These results were then used as input in a water balance to calculate groundwater recharge. Two approaches were used to assess the accuracy of these groundwater balance estimates: (1) comparison to calculations of groundwater recharge using the calibrated conceptual HBV Light model, and (2) comparison to groundwater recharge estimates from physically similar catchments in Switzerland that are found in the literature. In all cases, recharge is estimated at approximately 40–45% of annual precipitation. These conditions were found to closely echo those results from Swiss catchments of similar characteristics.

Hydrograph separation of the Dzhankuat River, North Caucasus, with the use of isotope methods

2016 ◽  
Vol 43 (6) ◽  
pp. 847-861 ◽  
Author(s):  
Yu. K. Vasil’chuk ◽  
E. P. Rets ◽  
Ju. N. Chizhova ◽  
I. V. Tokarev ◽  
N. L. Frolova ◽  
...  
Keyword(s):  
Hydrograph Separation ◽  
North Caucasus

scholarly journals Spatio-temporal variability of the isotopic input signal in a partly forested catchment: Implications for hydrograph separation

2018 ◽  
Vol 33 (1) ◽  
pp. 36-46 ◽  
Author(s):  
Carles Cayuela ◽  
Jérôme Latron ◽  
Josie Geris ◽  
Pilar Llorens
Keyword(s):  
Input Signal ◽  
Temporal Variability ◽  
Hydrograph Separation ◽  
Forested Catchment ◽  
Spatio Temporal

Vertically detailed in situ measurements of gelbstoff: demonstrating the impact of a runoff event

Hydrobiologia ◽  
2004 ◽  
Vol 517 (1-3) ◽  
pp. 171-177
Author(s):  
Steven W. Effler ◽  
David M. O'Donnell ◽  
MaryGail Perkins ◽  
David G. Smith
Keyword(s):  
In Situ Measurements ◽  
Runoff Event ◽  
The Impact
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