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Catchment travel time distributions and water flow in soils
Year:
2011
Source of publication :
Water Resources Research
Authors :
Russo, David
;
.
Volume :
47
Co-Authors:
Rinaldo, A., Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland, Dipartimento IMAGE, Universitá Degli Studi di Padova, Padua I-35131, Italy
Beven, K.J., Lancaster Environment Center, Lancaster University, Lancaster LA1 4YQ, United Kingdom, Geocentrum, Uppsala University, Uppsala, Sweden
Bertuzzo, E., Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
Nicotina, L., Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
Davies, J., Lancaster Environment Center, Lancaster University, Lancaster LA1 4YQ, United Kingdom
Fiori, A., Dipartimento di Scienze dell'Ingegneria Civile e Ambientale, Università di Roma Tre, Rome I-00146, Italy
Russo, D., Department of Environmental Physics and Irrigation, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
Botter, G., Dipartimento IMAGE, Universitá Degli Studi di Padova, Padua I-35131, Italy
Facilitators :
From page:
To page:
(
Total pages:
1
)
Abstract:
Many details about the flow of water in soils in a hillslope are unknowable given current technologies. One way of learning about the bulk effects of water velocity distributions on hillslopes is through the use of tracers. However, this paper will demonstrate that the interpretation of tracer information needs to become more sophisticated. The paper reviews, and complements with mathematical arguments and specific examples, theory and practice of the distribution(s) of the times water particles injected through rainfall spend traveling through a catchment up to a control section (i.e., "catchment" travel times). The relevance of the work is perceived to lie in the importance of the characterization of travel time distributions as fundamental descriptors of catchment water storage, flow pathway heterogeneity, sources of water in a catchment, and the chemistry of water flows through the control section. The paper aims to correct some common misconceptions used in analyses of travel time distributions. In particular, it stresses the conceptual and practical differences between the travel time distribution conditional on a given injection time (needed for rainfall-runoff transformations) and that conditional on a given sampling time at the outlet (as provided by isotopic dating techniques or tracer measurements), jointly with the differences of both with the residence time distributions of water particles in storage within the catchment at any time. These differences are defined precisely here, either through the results of different models or theoretically by using an extension of a classic theorem of dynamic controls. Specifically, we address different model results to highlight the features of travel times seen from different assumptions, in this case, exact solutions to a lumped model and numerical solutions of the 3-D flow and transport equations in variably saturated, physically heterogeneous catchment domains. Our results stress the individual characters of the relevant distributions and their general nonstationarity yielding their legitimate interchange only in very particular conditions rarely achieved in the field. We also briefly discuss the impact of oversimple assumptions commonly used in analyses of tracer data. Copyright 2011 by the American Geophysical Union.
Note:
Related Files :
Catchments
Descriptors
rain
runoff
Sampling time
Tracer
water chemistry
Water injection
Show More
Related Content
More details
DOI :
10.1029/2011WR010478
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
32790
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:12
Scientific Publication
Catchment travel time distributions and water flow in soils
47
Rinaldo, A., Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland, Dipartimento IMAGE, Universitá Degli Studi di Padova, Padua I-35131, Italy
Beven, K.J., Lancaster Environment Center, Lancaster University, Lancaster LA1 4YQ, United Kingdom, Geocentrum, Uppsala University, Uppsala, Sweden
Bertuzzo, E., Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
Nicotina, L., Laboratory of Ecohydrology, School of Architecture, Civil and Environmental Engineering, École Polytechnique Fédérale de Lausanne, Lausanne CH-1015, Switzerland
Davies, J., Lancaster Environment Center, Lancaster University, Lancaster LA1 4YQ, United Kingdom
Fiori, A., Dipartimento di Scienze dell'Ingegneria Civile e Ambientale, Università di Roma Tre, Rome I-00146, Italy
Russo, D., Department of Environmental Physics and Irrigation, Agricultural Research Organization, Volcani Center, Bet Dagan 50-250, Israel
Botter, G., Dipartimento IMAGE, Universitá Degli Studi di Padova, Padua I-35131, Italy
Catchment travel time distributions and water flow in soils
Many details about the flow of water in soils in a hillslope are unknowable given current technologies. One way of learning about the bulk effects of water velocity distributions on hillslopes is through the use of tracers. However, this paper will demonstrate that the interpretation of tracer information needs to become more sophisticated. The paper reviews, and complements with mathematical arguments and specific examples, theory and practice of the distribution(s) of the times water particles injected through rainfall spend traveling through a catchment up to a control section (i.e., "catchment" travel times). The relevance of the work is perceived to lie in the importance of the characterization of travel time distributions as fundamental descriptors of catchment water storage, flow pathway heterogeneity, sources of water in a catchment, and the chemistry of water flows through the control section. The paper aims to correct some common misconceptions used in analyses of travel time distributions. In particular, it stresses the conceptual and practical differences between the travel time distribution conditional on a given injection time (needed for rainfall-runoff transformations) and that conditional on a given sampling time at the outlet (as provided by isotopic dating techniques or tracer measurements), jointly with the differences of both with the residence time distributions of water particles in storage within the catchment at any time. These differences are defined precisely here, either through the results of different models or theoretically by using an extension of a classic theorem of dynamic controls. Specifically, we address different model results to highlight the features of travel times seen from different assumptions, in this case, exact solutions to a lumped model and numerical solutions of the 3-D flow and transport equations in variably saturated, physically heterogeneous catchment domains. Our results stress the individual characters of the relevant distributions and their general nonstationarity yielding their legitimate interchange only in very particular conditions rarely achieved in the field. We also briefly discuss the impact of oversimple assumptions commonly used in analyses of tracer data. Copyright 2011 by the American Geophysical Union.
Scientific Publication
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