An optimized snowmelt lysimeter system for monitoring melt rates and collecting samples for stable water isotope analysis

Title:

An optimized snowmelt lysimeter system for monitoring melt rates and collecting samples for stable water isotope analysis

Creator:

Rücker, Andrea, Zappa, Massimiliano, Boss, Stefan, and von Freyberg, Jana

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:98c34cd2-9c1e-420f-b737-baeb8bdc4620
uuid:98c34cd2-9c1e-420f-b737-baeb8bdc4620
doi:10.2478/johh-2018-0007

Subject:

snowmelt lysimeter, snowmelt collection, snowmelt rate, and stable water isotopes

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

The contribution of snow meltwater to catchment streamflow can be quantified through hydrograph separation analyses for which stable water isotopes (18O, 2H) are used as environmental tracers. For this, the spatial and temporal variability of the isotopic composition of meltwater needs to be captured by the sampling method. This study compares an optimized snowmelt lysimeter system and an unheated precipitation collector with focus on their ability to capture snowmelt rates and the isotopic composition of snowmelt. The snowmelt lysimeter system consists of three individual unenclosed lysimeters at ground level with a surface of 0.14 m2 each. The unheated precipitation collector consists of a 30 cm-long, extended funnel with its orifice at 2.3 m above ground. Daily snowmelt samples were collected with both systems during two snowfall-snowmelt periods in 2016. The snowmelt lysimeter system provided more accurate measurements of natural melt rates and allowed for capturing the small-scale variability of snowmelt process at the plot scale, such as lateral meltwater flow from the surrounding snowpack. Because of the restricted volume of the extended funnel, daily melt rates from the unheated precipitation collector were up to 43% smaller compared to the snowmelt lysimeter system. Overall, both snowmelt collection methods captured the general temporal evolution of the isotopic signature in snowmelt.

Language:

Slovak

Rights:

http://creativecommons.org/publicdomain/mark/1.0/
policy:public

Source:

Journal of hydrology and hydromechanics | 2019 Volume:67 | Number:1

Harvested from:

CDK

Metadata only:

false