CF021
Water chemistry in streams and precipitation samples in the HJ Andrews Experimental Forest, 2022-2023

CREATOR(S): Catalina Segura, Jaimie Ortega, Pamela Sullivan

PRINCIPAL INVESTIGATOR(S): Catalina Segura

ORIGINATOR(S): Catalina Segura

OTHER RESEARCHER(S): Pamela Sullivan, Jaimie Ortega, Sidney Bush

DATA SET CREDIT:

College of Forestry Undergraduate Mentored Employment Program National Science Foundation under Grant Numbers: DEB-1440409, AGS-0955841, DEB-1547628, DEB-1943574.

METADATA CREATION DATE:

1 Oct 2024

MOST RECENT METADATA REVIEW DATE:

2 Dec 2024

KEYWORDS:

geography, hydrology, chemistry, streams

PURPOSE:

The objective of this data is to characterize the stream water chemistry in the Andrews Forest.

METHODS:

Experimental Design - CF021:

Description: To examine spatiotemporal patterns in stream chemistry, we sampled 10 sites across the Lookout Creek catchment. Five tributary stream sites were selected Cold, Longer, Mack, Nostoc, and McRae Creeks. Drainage areas of these sub-catchments range from 0.69 km2 to 15.63 km2. Five additional sites were established roughly below the confluence of each tributary along the main stem of Lookout Creek with drainage areas ranging from 5.53 km2 to 62.42 km2.

Field Methods - CF021:

Description: To capture seasonal streamflow and precipitation signals weekly stream and precipitation samples were collected from May 2022 to May 2023. Stream samples were collected in the middle of the stream during low flow conditions and within a wading distance from banks during high flow conditions. Two samples were collected from each site, filtered (0.45 µm), and split: one acidified for cations, the other un-acidified for anions. Composite precipitation samples were collected from a Stratus Precision Rain gauge (Stratus, US) at PRIMET.

Laboratory Methods - CF021:

Description: Samples were analyzed for cations (Si4+, Ca2+, Mg2+, K+, and Na+) using a Spectro ARCOS MultiView (AMETEK, Czech Republic) equipped with an optical emission spectrometer with true radial or axial observation of inductively coupled plasma (ICP-OES), and anions (Cl- and SO42-) using a Dione Aquion Ion Chromatography (IC) System (ThermoFisher Scientific, US). All solutes are reported in mg/l (ppm) with an analytical uncertainty of ± 5%).

TAXONOMIC SYSTEM:

None

GEOGRAPHIC EXTENT:

Hydrologic systems in the Andrews Forest

ELEVATION_MINIMUM (meters):

412

ELEVATION_MAXIMUM (meters):

1631

MEASUREMENT FREQUENCY:

Approximately weekly

PROGRESS DESCRIPTION:

Active

UPDATE FREQUENCY DESCRIPTION:

asNeeded

CURRENTNESS REFERENCE:

Ground condition