A DATA SET is a series of observations collected by the same methodology. Each data set should have documentation sufficient for someone unfamiliar with the research to replicate the study. Data sets may be broken into subsets (data files) that are discrete in space and time, in that order. The documentation for a data set should include all spatial and temporal subdivisions of the data.

(Data, Abstract, Methods, Variables)

NOTES:

• Add rows to tables or lines to paraghaphs as you need them for entering your data.
• Contact emelendez@lternet.edu, if you have any question.

PERSON(S) COMPLETING THIS FORM: E-MAIL ADDRESS:

DATA SET IDENTIFIER: USGS long-term streamflow data at several locations in the Luquillo Experimental Forest (LEF)

PROJECT TITLE: Streamflow in the Luquillo Experimental Forest (LEF) (USGS - LTER )

PROJECT DESCRIPTION: The US Geological Survey has monitored daily average streamflow (in cubic feet per second; CFS) at 19 streams in or near the Luquillo Experimental Forest starting in 1945 (Table 1). Twelve streams are reported here. This summary includes monthly summaries of that data set through 30 September 1994. More recent data are available from the USGS Streamflow Web site.

LTER CORE AREAS: (Annotate all that apply)

Inorganic Inputs

LEF LTER 1 RESEARCH TOPIC: (Annotate all that apply)

Environmental monitoring

We define a data file as a component of a data set. A data set can have only one data file or more. Basically, different data files have different data structures or format.
DATA SET FILES (SUBSETS):

NOTE: For recent data visit the USGS the Surface-Water Data for Puerto Rico web site at: http://waterdata.usgs.gov/pr/nwis/sw
Data File No.	Data File Identifier		On-Line Filename		Starting Date		Periodicity of sample	End Period
1	Rio Gurabo below El Mango		55750		3/10/90		Daily	9/30/94
2	Rio Gurabo at Gurabo		57000a		10/1/59		Daily	12/31/75
3	Rio Gurabo at Gurabo		57000b		1/1/76		Daily	9/30/94
4	Rio Canovanillas		61300		1/1/67		Daily	12/31/73
5	Rio Canovanas		61800a		3/28/67		Daily	12/31/80
6	Rio Canovanas		61800b		1/1/81		Daily	12/31/94
7	Rio Herrera		62500		7/21/66		Daily	12/31/73
8	Rio Espiritu Santo		63250		7/1/45		Daily	12/31/52
9	Rio Espiritu Santo		63300		3/1/67		Daily	12/31/73
10	Quebrada Sonadora(QS)		63440		3/29/83		Daily	9/30/94
11	Quebrada Toronja (QT)		63500		4/1/83		Daily	9/30/94
12	Rio Espiritu Santo nr Rio Grande		63800a		8/1/66		Daily	12/31/79
13	Rio Espiritu Santo nr Rio Grande		63800b		1/1/80		Daily	12/31/94
14	Rio Grande nr El Verde		64200a		5/9/67		Daily	12/31/70
15	Rio Grande nr El Verde		64200b		1/1/72		Daily	10/7/82
16	Rio Grande nr El Verde		64200c		10/1/90		Daily	9/30/94
17	Rio Mameyes nr Sabana (PRM)		65500a		8/2/67		Daily	12/31/73
18	Rio Mameyes nr Sabana (PRM)		65500b		6/1/83		Daily	9/30/94
19	Rio Mameyes at Hwy 191		65700		10/1/66		Daily	1/24/85
20	Rio Sabana		67000		10/1/79		Daily	9/30/94
21	Rio Fajardo nr Fajardo		71000a		4/1/1961		Daily	12/31/78
22	Rio Fajardo nr Fajardo		71000b		1/1/79		Daily	12/31/94
23	Quebrada Palma		73400		9/8/72		Daily	9/30/77
24	Rio Icacos		75000a		7/1/45		Daily	3/31/53
25	Rio Icacos (RI)		75000b		10/1/79		Daily	9/30/94
26	Rio Blanco		76000		10/1/82		Daily	1/25/85
27	Rio Blanco		77000		9/8/72		Daily	9/30/77
28	Quebrada 1 Bisley		Q1metstation		9/19/88		Daily	9/18/94
29	Quebrada 2 Bisley		Q2metstation		9/19/88		Daily	9/18/94
30	Quebrada 3 Bisley		Q3metstation		9/19/88		Daily	9/18/94

RESEARCH LOCATION: Located in several streams within the LEF

INVESTIGATORS:

PRINCIPAL INVESTIGATORS E-MAIL address

Douglas Schaefer

DSchaef53@hotmail.com

OTHER RESEARCHERS E-MAIL address

CONTACT PERSONS E-MAIL address Phone Number (Include area code)

Eda C. Meléndez

emelendez@lternet.edu

(787)767-0350

SOURCE OF FUNDING (SPONSOR): NSF-LTER

DATA SET ABSTRACT: The daily data are summarized to monthly as follows:
Daily average CFS are summed for each month and multiplied by 86400 (seconds per day) to yield cubic feet per month. This value is divided by the particular watershed area and multiplied by another conversion factor to yield cm water equivalent depth discharged by each watershed per month. This allows direct hydrologic comparison of watersheds of different sizes. Time series plots illustrate the biennial periodicity of high and low discharges, and particular floods and droughts. October 1970 was the historic flood for PR, recently exceeded during the passage of Hurricane Hortense in September 1996. The historic drought occurred during 1993-1994 and is clearly visible in these records.

Table 1. United States Geological Survey (USGS) streamflow records from the Luquillo Experimental Forest. The periods of record presented here end with the 1994 water year (except for those stations whose records ended earlier). Watershed records are subdivided (a,b, etc.) when substantial gaps exist. The watersheds indicated with abbreviations are those where streamwater chemistry has also been measured. (NOTE: For recent data visit the USGS the Surface-Water Data for Puerto Rico web site at: http://waterdata.usgs.gov/pr/nwis/sw)

DATA SET METHODS: Refer to USGS Annual Water-Data Reports for details. Browse on the U.S. Geological Survey water-use Web Page for a description of the data elements in the U.S. Geological Survey water-use data files. Visit the USGS  Daily Streamflow for Puerto Rico Web page to download more data and connect to the USGS Global Change Research Program's for further information.

REFERENCES:

CROSS-REFERENCES (other data sets related to this one):

SAMPLE LOCATION: N/A

STORAGE SITES: ITES, Data Manager's File DM-002 , Drawer #1

INVESTIGATOR'S ASSIGNED KEYWORDS: Weather, climate, meteorology, meteorological monitoring, modeling, discharge, streamflow

LEF LTER OFFICIAL KEYWORDS (See table): LEF, HEADWATER STREAM, DISCHARGE, REPORT

PUBLICATIONS:
US Geological Survey, Commonwealth of PR, et. al. several years. Water resources data Puerto Rico and the U.S. Virgin Islands.

DISSEMINATION: UNRESTRICTED

REASONS TO RESTRICT DATA IN THIS DATA SET BEYOND ITS TWO YEAR POLICY PERIOD*:

*WILL HAVE TO BE APPROVED BY LTER PRINCIPAL INVESTIGATORS: J. ZIMMERMAN, A. LUGO , D.J. LODGE

SITES DESCRIPTIONS: Refer to USGS Annual Water-Data Reports for details. Browse on the USGS Web Page for more details.

Geographical positional system (GPS) Coordinates for each location:

location	latitude	longitude
Rio Icacos	18°16'38"	65°47'09"

VARIABLES (ATTRIBUTES): ,date

FILE NAME OR #ABOVE (all in which the variable appears)	all	1-27	28,29,30	28,29,30
ABBREVIATION (as it appears on the data file)	DATE	CFS	Year	discharge_mm/day
NAME OF VARIABLE	Date of reading	Daily Cubic Feet per Seconds (CFS) value	Year of reading	Daily discharge data
DEFINITION OF VARIABLE	Date of reading (in dd/mm/yyyy)	Daily averages calculated from the USGS reported volume of water flowing past a given point in the stream in a given period of time. Streamflow is reported as cubic feet per second (ft3/s).	Year of reading (in yyyy)	Calculated daily discharge data, (in mm/day) of runoff
UNIT		cubicFeetPerSecond		milli meters per day
PRECISION
RANGE OR LIST OF VALUES
DATA TYPE	datetime	decimal	datetime	decimal
MISSING DATA CODES

COMPUTATIONAL METHODS:

Variable Name	Formula
SUM CFS	CFM = ((SUM CFSi) * 86400)/(watershed area) * 2.8137 X 10-1, where CFSi = average daily values = sum of daily discharge values SUM CFSi = CFM = sum of average daily values for a particular month  i = 1..n n = {29, 30, 31} = number of days of the month 2.8137 X 10-1 = unit conversion factor

Observation: The daily data are summarized to monthly as follows: Daily average CFS are summed for each month and multiplied by 86400 (seconds per day) to yield cubic feet per month (CFM). This value is divided by the particular watershed area and multiplied by another conversion factor to yield cm water equivalent depth discharged by each watershed per month.

FOR DATA MANAGER USE ONLY

DATE OF LAST REVIEW: December 31, 2008
DATE OF LAST ENTRY:
STAGE OF DATA SET MANAGEMENT (dates):
RECEIVED: 10/1/96
CATALOGUED: 10/1/96
ON-LINE: 11/15/96
REVIEWED BY RESEARCHER: 11/18/96
FILING MEDIA:
NAME OF DOCUMENTATION FILE: USGSTREA.*
NAME OF DATA FILE: I. #####CFS.TXT, II. #####CM.TXT
NAME OF ON - LINE CATALOG: LTERDBAS RECORD # : 58
DOCUMENT TYPE: data set (magnetic media)
PRIORITY TO BE ENTERED: N/A 

Rev. date of this form: 8 June 2001