# Stream tracer experiments to assess channel and hyporheic residence times of streams in the Andrews Experimental Forest in 2001 & 2002

## Dataset

- **Database Code:** HF011

- **Title:** Stream tracer experiments to assess channel and hyporheic residence times of streams in the Andrews Experimental Forest in 2001 & 2002

- **Abstract:**

Time series of tracer (Rhodamine WT) concentration data representing a "break-through curve" resulting from a stream tracer injection. Stream tracer experiments were conducted in the lower reach of 2nd-order Watershed 3 in April, 2001, and 2 adjacent reaches of 4th-order Lookout Creek in July, 2002. Rhodamine WT dye was injected as a pulse (non-continuous injection). Concentration data were collected in the field at early time using a field fluorometer equipped with a flow-through cell. Late-time samples collected with an ISCO auto sampler, which were analyzed in the lab with the same fluorometer (reconfigured for analysis with cuvettes) within 72 hours. Particular care was taken to collect late-time, low-concentration data, which are useful in quantifying the residence time of secondary storage within or adjacent to the stream, such as the hyporheic zone or in-stream transient storage zones. In the data set, Tracer 1 refers to the injection in Watershed 3; Tracer 2 refers to the injection in Reach 411 of Lookout Creek; Tracer 3 refers to the injection in the combined Reach 410/411 of Lookout Creek.


- **Keywords:** geomorphology; stream order; physical processes; hydrologic processes; groundwater; hyporheic zone; streams

- **Temporal coverage:** 2001-04-21 to 2001-07-18

- **Principal Investigator:** Roy Haggerty


## Data Entities

1. HF01101

## Entity 1: HF01101

### Attribute list

- **DBCODE** — varchar, enum

Database code

  - **HF011** — FSDB Database Code HF011


- **ENTITY** — numeric(1.000000), range  1.0000  1.0000, number

Entity number


- **REACH** — varchar, enum

Name of stream reach measured

  - **WS3** — Andrews Watershed 3 (Reach WS3)
  - **LO410** — Lookout Creek (Reach 410)
  - **LO411** — Lookout Creek (Reach 411)


- **SERIES** — varchar, enum

Time series

  - **E** — Early time/concentration series
  - **L** — Late time/concentration series


- **TEST** — varchar, enum

Tracer test number

  - **1** — Tracer test 1
  - **2** — Tracer test 2
  - **3** — Tracer test 3


- **DATANUM** — numeric(1.000000), range  0.0000  7467.0000, number

Sample number


- **DATE** — datetime, freetext

Date of measurement


- **TIME** — numeric(1.000000), range  0.0000  511140.0000, seconds of a degree

Time elapsed since beginning of tracer test


- **CONCEN** — numeric(0.010000), range  -0.0200  318.2500, micrograms per liter

Concentration of rhodamine wt, corrected to near zero from background fluore escence


- **MASSFLUX** — numeric(0.010000), range  -0.6600  6505.3200, micrograms per second

Mass flux rate of rhodamine at corresponding time


- **DISCHARGE** — numeric(0.100000), range  19.8000  346.1500, liters per second

Streamflow rate


- **TEMP** — numeric(0.100000), range  6.9000  15.1000, degrees Celsius

Water temperature


## Attribute Definitions

**CONCEN**

Concentration of rhodamine wt, corrected to near zero from background fluore escence


**DATANUM**

Sample number


**DATE**

Date of measurement


**DBCODE**

Database code


**DISCHARGE**

Streamflow rate


**ENTITY**

Entity number


**MASSFLUX**

Mass flux rate of rhodamine at corresponding time


**REACH**

Name of stream reach measured


**SERIES**

Time series


**TEMP**

Water temperature


**TEST**

Tracer test number


**TIME**

Time elapsed since beginning of tracer test


## Enumerated Domains

### DBCODE

- **HF011** — FSDB Database Code HF011

### REACH

- **WS3** — Andrews Watershed 3 (Reach WS3)

- **LO410** — Lookout Creek (Reach 410)

- **LO411** — Lookout Creek (Reach 411)

### SERIES

- **E** — Early time/concentration series

- **L** — Late time/concentration series

### TEST

- **1** — Tracer test 1

- **2** — Tracer test 2

- **3** — Tracer test 3