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Prepared in cooperation with the State of Hawaii Department of Transportation

U.S. Geological Survey
Open-File Report 2007-1213
version 1.0

Rainfall, Streamflow, and Water-Quality Data During Stormwater Monitoring, Halawa Stream Drainage Basin, Oahu, Hawaii, July 1, 2006 to June 30, 2007

By Stacie T.M. Young and Marcael T.J. Jamison

2007

Stream-gaging stations, rain gages, and water-quality sampling stations in the Halawa drainage basin, Oahu, Hawaii (from figure 1)

This report is available as a pdf.

Abstract

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. This program is designed to assess the effects of highway runoff and urban runoff on Halawa Stream. For this program, rainfall data were collected at two stations, continuous streamflow data at three stations, and water-quality data at five stations, which include the two continuous streamflow stations. This report summarizes rainfall, streamflow, and water-quality data collected between July 1, 2006 and June 30, 2007.

A total of 13 samples was collected over two storms during July 1, 2006 to June 30, 2007. The goal was to collect grab samples nearly simultaneously at all five stations and flow-weighted time-composite samples at the three stations equipped with automatic samplers. Samples were analyzed for total suspended solids, total dissolved solids, nutrients, chemical oxygen demand, and selected trace metals (cadmium, chromium, copper, lead, nickel, and zinc). Additionally, grab samples were analyzed for oil and grease, total petroleum hydrocarbons, fecal coliform, and biological oxygen demand. Quality-assurance/quality-control samples were also collected during storms and during routine maintenance to verify analytical procedures and check the effectiveness of equipment-cleaning procedures.

Contents

Abstract
Introduction
Data-Collection Network
Water-Quality Sampling Techniques

Sampling requirements
Storm criteria
Sample collection
Determination of discharge for samples
Sample processing, analysis, and quality assurance/quality control

Rainfall and Streamflow Data
Stormwater Sampling: Conditions And Results

Third Quarter 2006 - July 1 to September 30, 2006
Fourth Quarter 2006 - October 1 to December 31, 2006

Storm of November 1, 2006

First Quarter 2007 - January 1 to March 31, 2007
Second Quarter 2007 - April 1 to June 30, 2007

Storm of June 5, 2007

Quality Assurance
References Cited
Appendix A: Discharge-Reporting and Load-Calculation Methods
Appendix B: Physical Properties, Concentrations, and Loads for All Samples Collected from Halawa Stream Drainage Basin During the Period from July 1, 2006 to June 30, 2007, Oahu, Hawaii - Also available as an Excel file (of2007-1213_appendix_b.xls; 40 Kb).

Download this report as an 30-page PDF file (of2007-1213.pdf; 800 kB)

For questions about the content of this report, contact Stacie Young

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URL: https://pubs.usgs.gov/of/2007/1213/
Page Contact Information: Michael Diggles
Page Last Modified: October 18, 2007