# The effects of debris flows on stream fine benthic organic matter (FBOM), characteristics, 1996

## Dataset

- **Database Code:** HS006

- **Title:** The effects of debris flows on stream fine benthic organic matter (FBOM), characteristics, 1996

- **Abstract:**

The biochemical characteristics of fine benthic organic matter (FBOM) were studied in 14 stream reaches. Half of these low-order mountain stream reaches had experienced significant debris flow events during server winter storms and half did not.


- **Keywords:** stream ecology; debris flows; organic matter; sediments; forest ecosystems; aquatic ecosystems; streams; organic matter

- **Temporal coverage:** 1996-06-26 to 1996-09-06

- **Principal Investigator:** Robert P. Griffiths


## Data Entities

1. HS00601

## Entity 1: HS00601

### Attribute list

- **DATACODE** — varchar, freetext

Database code


- **FORMAT** — numeric(1), range  1.0000  1.0000, number

Entity number


- **SITE** — varchar, freetext

Site designator


- **CONDITN** — varchar, enum

Condition of stream; was there a debris flow? (Yes, No)

  - **yes** — there was a debris flow
  - **no** — there was no debris flow


- **PAIR** — numeric(1), range  1.0000  7.0000, number

Designators for paired streams; there were seven pairs with and without debris flow


- **DATE** — varchar, enum

Sample date; 1=6/26/96; 2=7/1/96; 3=7/30/96; 4=9/6/96

  - **1** — 06/26/1996 sample
  - **2** — 07/01/1996 sample
  - **3** — 07/30/1996 sample
  - **4** — 09/06/1996 sample


- **TEMP** — numeric(1), range  7.0000  21.0000, degrees Celsius

Stream temperature


- **RESP_OM** — numeric(1), range  15.7500  165.1700, micrograms per gram per hour

Slurry respiration rates normalized to g organic matter


- **RESP** — numeric(1), range  2.8600  43.9600, micrograms per gram per hour

Slurry respiration rates normalized to g dry mass


- **DENIT_OM** — numeric(1), range  1.4400  20.9700, micrograms per gram per hour

Slurry denitrification potential normalized to g organic


- **DENIT** — numeric(1), range  0.2500  6.7700, micrograms per gram per hour

Slurry denitrification potential normalized to g dry mass


- **N2FIX_OM** — numeric(1), range  0.0100  71.0600, micromoles per gram per hour

Slurry nitrogen fixation normalized to g organic matter


- **N2FIX** — numeric(1), range  0.0200  76.4600, micromoles per gram per hour

Slurry nitrogen fixation normalized to g dry mass


- **PHOSPH_OM** — numeric(1), range  10.6900  121.9100, micromoles per gram per hour

Phosphatase activity normalized to g OM


- **PHOSPH** — numeric(1), range  1.3900  31.2700, micromoles per gram per hour

Phosphatase activity normalized to g dry mass


- **B_GLUC_OM** — numeric(1), range  2.6700  61.6400, micromoles per gram per hour

Beta-glucosidase activity normalized to g OM


- **B_GLUC** — numeric(1), range  0.3500  17.0300, micromoles per gram per hour

Beta-glucosidase activity normalized to g dry mass


- **EXAMM_OM** — numeric(1), range  1.0400  23.8300, micromoles per gram

Extractable ammonium normalized to g OM


- **EXAMM** — numeric(1), range  0.1500  6.3400, micromoles per gram

Extractable ammonium normalized to g dry mass


- **MINN_OM** — numeric(1), range  22.7200  260.4200, micromoles per gram

Mineralizable nitrogen normalized to g OM


- **MINN** — numeric(1), range  3.2200  69.3100, micromoles per gram

Mineralizable nitrogen normalized to g dry mass


- **DRYWT_OM** — numeric(1), range  0.5600  3.9600, number

Dry weight divided by OM


## Attribute Definitions

**B_GLUC**

Beta-glucosidase activity normalized to g dry mass


**B_GLUC_OM**

Beta-glucosidase activity normalized to g OM


**CONDITN**

Condition of stream; was there a debris flow? (Yes, No)


**DATACODE**

Database code


**DATE**

Sample date; 1=6/26/96; 2=7/1/96; 3=7/30/96; 4=9/6/96


**DENIT**

Slurry denitrification potential normalized to g dry mass


**DENIT_OM**

Slurry denitrification potential normalized to g organic


**DRYWT_OM**

Dry weight divided by OM


**EXAMM**

Extractable ammonium normalized to g dry mass


**EXAMM_OM**

Extractable ammonium normalized to g OM


**FORMAT**

Entity number


**MINN**

Mineralizable nitrogen normalized to g dry mass


**MINN_OM**

Mineralizable nitrogen normalized to g OM


**N2FIX**

Slurry nitrogen fixation normalized to g dry mass


**N2FIX_OM**

Slurry nitrogen fixation normalized to g organic matter


**PAIR**

Designators for paired streams; there were seven pairs with and without debris flow


**PHOSPH**

Phosphatase activity normalized to g dry mass


**PHOSPH_OM**

Phosphatase activity normalized to g OM


**RESP**

Slurry respiration rates normalized to g dry mass


**RESP_OM**

Slurry respiration rates normalized to g organic matter


**SITE**

Site designator


**TEMP**

Stream temperature


## Enumerated Domains

### CONDITN

- **yes** — there was a debris flow

- **no** — there was no debris flow

### DATE

- **1** — 06/26/1996 sample

- **2** — 07/01/1996 sample

- **3** — 07/30/1996 sample

- **4** — 09/06/1996 sample