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U.S. Geological Survey Open File Report 2010-1161

Prepared in cooperation with the State of Hawaii Department of Transportation

Rainfall, Discharge, and Water-Quality Data During Stormwater Monitoring, H-1 Storm Drain, Oahu, Hawaii, July 1, 2009, to June 30, 2010

By Todd K. Presley and Marcael T.J. Jamison

ABSTRACT

Thumbnail of and link to report PDF (1.2 MB)

Storm runoff water-quality samples were collected as part of the State of Hawaii Department of Transportation Stormwater Monitoring Program. The program is designed to assess the effects of highway runoff and urban runoff collected by the H-1 storm drain on the Manoa-Palolo Drainage Canal. This report summarizes rainfall, discharge, and water-quality data collected between July 1, 2009, and June 30, 2010.

As part of this program, rainfall and continuous discharge data were collected at the H-1 storm drain. During the year, sampling strategy and sample processing methods were modified to improve the characterization of the effects of discharge from the storm drain on the Manoa-Palolo Drainage Canal. During July 1, 2009, to February 1, 2010, samples were collected from only the H-1 storm drain. Beginning February 2, 2010, samples were collected simultaneously from the H-1 storm drain and the Manoa-Palolo Drainage Canal at a location about 50 feet upstream of the discharge point of the H-1 storm drain.

Three storms were sampled during July 1, 2009, to June 30, 2010. All samples were collected using automatic samplers. For the storm of August 12, 2009, grab samples (for oil and grease, and total petroleum hydrocarbons) and a composite sample were collected. The composite sample was analyzed for total suspended solids, nutrients, and selected dissolved and total (filtered and unfiltered) trace metals (cadmium, chromium, nickel, copper, lead, and zinc). Two storms were sampled in March 2010 at the H-1 storm drain and from the Manoa-Palolo Drainage Canal. Two samples were collected during the storm of March 4, 2010, and six samples were collected during the storm of March 8, 2010. These two storms were sampled using the modified strategy, in which discrete samples from the automatic sampler were processed and analyzed individually, rather than as a composite sample, using the simultaneously collected samples from the H-1 storm drain and from the Manoa-Palolo Drainage Canal. The discrete samples were analyzed for some or all of the following constituents: total suspended solids, nutrients, oil and grease, and selected dissolved (filtered) trace metals (cadmium, chromium, nickel, copper, lead, and zinc).

Five quality-assurance/quality-control samples were analyzed during the year. These samples included one laboratory-duplicate, one field-duplicate, and one matrix-spike sample prepared and analyzed with the storm samples. In addition, two inorganic blank-water samples, one sample at the H-1 storm drain and one sample at the Manoa-Palolo Drainage Canal, were collected by running the blank water (water purified of all inorganic constituents) through the sampling and processing systems after cleaning automatic sampler lines to verify that the sampling lines were not contaminated.

  • Report PDF (1.2 MB)
  • Table 3 folder. Table 3 is also available here as a spreadsheet in several file formats (four files; 128 kB total)
  • This report is available only on the Web.

For additional information contact:
Center Director, Pacific Islands Water Science Center
U.S. Geological Survey
677 Ala Moana Blvd., Suite 415
Honolulu, HI 96813
http://hi.water.usgs.gov/

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Suggested citation:

Presley, T.K., and Jamison, M.T.J., 2010, Rainfall, discharge, and water-quality data during stormwater monitoring, H-1 storm drain, Oahu, Hawaii, July 1, 2009, to June 30, 2010: U.S. Geological Survey Open-File Report 2010-1161, 26 p.



Contents

Abstract

Introduction

Data-Collection Network

Water-Quality Sampling Methods

Rainfall and Discharge Data

Stormwater Sampling: Conditions and Results

Quality Assurance

References Cited

Appendix A. Discharge-Reporting and Load-Calculation Methods

Appendix B. Physical Properties, Concentrations, and Loads for All Samples Collected from the H-1 Storm Drain and the Manoa-Palolo Drainage Canal During the Period from July 1, 2009, to June 30, 2010, Oahu, Hawaii


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