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Ecosystem carbon and water fluxes in boreal forests

PI: Matthias Peichl

This project explores the ecosystem carbon and water fluxes at the Rosinedal and Svartberget forests using the eddy covariance technique. At Rosinedal, we also investigate the effect of ecosystem-scale N addition on these fluxes. The project is part of the Wallenberg project: Branchpoints.

boreal forestscarbon and water fluxeseddy covariance

CATCHMENT SCALE SUSPENDED SEDIMENT EXPORT

PI: Eliza Maher Hasselquist

Question: How does clear-cutting and subsequent ditch cleaning affect the quality and quantity of exported suspended solids (SS) at the catchment scale? Methods: 1. Turbidity logged every 15 minutes during the ice-free season 2. Suspended Sediment grab sample on average 2x per month all year round a. Use SS grab samples to correlate to turbidity and thus have continuous measurements during active times of the year. 3. Time Integrated Mass Flux Sampling (TIMS) during ice-free season – Integrated measure over 2 weeks 4. Ditch characteristics before and after cleaning a. bed material samples b. measurements of particle size distribution of the bed material c. ditch cross sections at 50 m intervals with high res GPS or total station d. ditch depth, bottom width

ditch cleaningdikesrensningwater qualityclear-cut

Citizens’ science project on bat monitoring for mapping green infrastructure of conservational value in urban areas

PI: Petter Axelsson

This is a citizen science project with the intention of mapping the presence of bats in urban Umeå and Uppsala, using server infrastructure at Svartberget.

batscitizen scienceumeåuppsala

Lake chamber flux measurements

PI: Hjalmar Laudon

Floating chambers are used to determe Green House Gas emissions from lake Stortjärn. The sampling strategy is based on the lake depth structure and three transects with 1 to 4 chambers each located so that they cover the majority of the depth profile.

fluxgreenhouse gaslakemonitoring

Stortjärn lake water sampling

PI: Hjalmar Laudon

Lake Stortjärn is one of the most expansive research sites within the Krycklan catchment, both in terms of new projects and infrastructure development.

chemistrywatermonitoringlake

Snowcat groundwater monitoring

PI: Hjalmar Laudon

In total, close to 20 wells are installed spanning from 5 m to over 150 m depth. The installations were made to cover the entire Krycklan catchment to investigate regional groundwater as well as allow more local studies of water pathways. The first wells were installed by the Swedish Geological Survey (SGU) in the 1980s and have been monitored since, whereas the majority was installed in 2012.

chemistrywatermonitoringgroundwatercatchment

Russian wells groundwater monitoring

PI: Hjalmar Laudon

The Kallkäls-mire is the source area for stream C4, and the location of the “Russians wells”. The “Russian wells” are a set of piezometers allowing sampling at different depths in, and below the mire.

chemistrywatermonitoringgroundwatermire

S-transect groundwater monitoring

PI: Hjalmar Laudon

The S-transect was installed 1997 and has been sampled monthly since. The transect consists of ceramic suction lysimeters at 5-7 depths in three plots: the riparian zone 4 m from the stream (S04), 12 m from the stream (S12) and in the up-slope mineral soil 22 m from the stream (S22). The installations are made so that samples can be collected all year by using a heating cable where the water passes through the frozen soil. The hydrology is focused in the upper horizons due to the hydrological conductivity which increases exponentially towards the soil surface.

transectgroundwatermonitoringchemistrylysimeters