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Numerical experiments on the age of seasonal rain water in hillslopes
Year:
2013
Source of publication :
Procedia Environmental Sciences
Authors :
רוסו, דוד
;
.
Volume :
19
Co-Authors:

Aldo Fiori
David Russo

Facilitators :
From page:
331
To page:
340
(
Total pages:
10
)
Abstract:

Solute transport in hillslope is often ruled by the water dynamics at the vadose zone and the groundwater. Solute is mobilized by rainfall, which feds the subsurface components of flow leading to water discharge and pollutograph at the outlet. It is often convenient to analyze solute transport through the travel time analysis. The latter is deeply influenced by the partitioning of the water ages. That is, rainfall typically mobilized pre-event (or old) water in the catchment, and the discharged water (and solute) is characterized by an age much larger than the one pertaining to the event water. We analyze solute transport in hillslope through a series of detailed numerical experiments. These are carried out through a three-dimensional saturated/unsaturated model, with realistic assumptions regarding the time- dependent rainfall and evapotranspiration forcing the flow system and the spatial distribution of the hydraulic properties. The scope is to analyze the travel time of rainfall in hillslopes as function of some selected characteristics and the seasonality of rainfall. We show that most of the river discharge is due to old water, i.e. rainfall coming from previous periods, sometimes very distant from the event. Also, each season displays a different travel time distribution for rainfall, as function of a few significant characteristics, like e.g. transpiration and the pre-event groundwater storage. The Equivalent Steady State approximation (ESS) for the analysis of solute transport is also tested.

Note:
Related Files :
age of water
old water paradox
Solute transport
Travel time distributions
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.proenv.2013.06.038
Article number:
0
Affiliations:
Database:
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
55952
Last updated date:
02/03/2022 17:27
Creation date:
18/08/2021 20:42
You may also be interested in
Scientific Publication
Numerical experiments on the age of seasonal rain water in hillslopes
19

Aldo Fiori
David Russo

Numerical experiments on the age of seasonal rain water in hillslopes

Solute transport in hillslope is often ruled by the water dynamics at the vadose zone and the groundwater. Solute is mobilized by rainfall, which feds the subsurface components of flow leading to water discharge and pollutograph at the outlet. It is often convenient to analyze solute transport through the travel time analysis. The latter is deeply influenced by the partitioning of the water ages. That is, rainfall typically mobilized pre-event (or old) water in the catchment, and the discharged water (and solute) is characterized by an age much larger than the one pertaining to the event water. We analyze solute transport in hillslope through a series of detailed numerical experiments. These are carried out through a three-dimensional saturated/unsaturated model, with realistic assumptions regarding the time- dependent rainfall and evapotranspiration forcing the flow system and the spatial distribution of the hydraulic properties. The scope is to analyze the travel time of rainfall in hillslopes as function of some selected characteristics and the seasonality of rainfall. We show that most of the river discharge is due to old water, i.e. rainfall coming from previous periods, sometimes very distant from the event. Also, each season displays a different travel time distribution for rainfall, as function of a few significant characteristics, like e.g. transpiration and the pre-event groundwater storage. The Equivalent Steady State approximation (ESS) for the analysis of solute transport is also tested.

Scientific Publication
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