LTER Zöbelboden, Austria, Metadata - Runoff multiparameter measurement

Basic Information
Related Site
LTER Zöbelboden - Austria
Abstract
The LTER site Zöbelboden was equipped with highly modern infrastructure to assess the effects of extreme climate events on the forest ecosystem. The instruments include eddy covariance measurements for CO2 and water vapor fluxes at a tower (900 m a.s.l), and soil respiration auto-chambers, as well as combined sap flow sensors with automated dendrometers in the main footprint area of the eddy tower. This is the so called intensive plot 2 (IP2), which is equipped by a number of different field measurement devices for long-term monitoring (lysimeters water sampling, soil moisture and temperature sensors, manual dendrometers, deposition, litter fall) and supplemented by other monitoring activities (tree inventory, needle and leaf chemistry, soil chemistry). An optical multi-parameter probe for dissolved nitrogen and carbon was installed in the measuring weir of the catchment runoff at 577 m a.s.l. There, weekly water quality, runoff, and meteorology is monitored since many years. The related metadata refer to the runoff multiparameter measurements. The data can be viewed and downloaded via the link provided using the station name "ZOE_0551P00"
Keywords
conductivity
Dissolved organic carbon (DOC)
nitrate
water temperature
Contact
Thomas Dirnboeck
Owner/Creator
Environment Agency Austria (EAA)
Metadata Provider
Gisela Proell
UUID
e62a731f-753c-4226-a2a1-8fc8616f24a4
Dates
Date Range
Post date
Thursday, June 4, 2020 - 11:56
Last modified
Thursday, December 17, 2020 - 16:20
Downloads
Online Locator
Distribution Function
Web address (URL)
Distribution URL
LTER-CWN time series management system
Geographic
Show details for observation location(s):
LTER Zöbelboden Measuring weir
Additional information
Method Description
The spectral sensor probe (S:CAN spectro::lyser) with a UV-Vis 220 - 720 nm detector (15 mm path length) was installed in a solid stainless steel box in the measuring weir. The probe measures turbidity, NO3--N, TOC, and DOC every 15 minutes. For power supply, solar panels together with a methanol fuel cell (EVOY Pro 800) are used. Additional long-term monitoring (runoff, conductivity, and temperature) is done in the same weir complemented by weekly water analyses. A meteorological station is installed adjacent to the measuring weir.
Sampling Time Unit
minutes
Sampling Time Span
minutes
Quality Assurance
The probe has an automatic brush (S::CAN ruck::sack) to regularly clean the optic. Every three months, the probe is cleaned with water. Afterwards the measurement path is rinsed with distilled water. The probe was installed with the pre-calibration of S::CAN and calibrated afterwards. In 2018, 29 (DOC), 26 (TOC), and 27 (NO3—N) runoff event samples (2018, June 12 - 14) were used to calibrate the probe regarding its accuracy in the measurement media. All data until 2019-03-27 was recalculated according to these regression equations. Further on, zero test and calibration is done on a regular basis as described below.
Plausibility checks are done daily to weekly, based on the automated data transfer. Implausible values are set to “non valid”. Zero tests with distilled water are carried out for all parameters every three month and the resulting offset is added/subtracted from the subsequently measured values (before they are transferred to the database) to compensate for drifting. Twice a year, low and high runoff samples are collected and analyzed for the purpose of a local two-point calibration of the spectro::lyser probe.
Parameters
water parameter
Spatial Design
regular
Intellectual Rights
Formal acknowledgement of the dataset providers
Spatial Scale
catchment