Regression Models for Computing Suspended-Sediment Concentration at Waihi Stream (16238500), Honolulu, Hawaii

Regression models were developed for computing the suspended-sediment concentration (SSC) at the U.S. Geological Survey (USGS) streamflow gaging station Waihi Stream at Honolulu, Hawaii (16238500) with the SSC of discrete samples and the continuous measurement of turbidity and recorded discharge at the gage. Sediment samples and turbidity data were collected by the USGS beginning in October 2017. This data release includes: 1) a .csv file with the calibration data used to develop the regression model, and 2) a Model Archive Summary (MAS) in .pdf file format that includes the regression model, model development details and diagnostic information. The calibration data are a subset of the available data and were selected at random for the purpose of reducing potential serial correlation in the regression model. All discrete SSC sample data and continuous turbidity and discharge data at this site are available via the Water Data for the Nation accessed at: https://waterdata.usgs.gov/nwis. The MAS was generated and reviewed technically for quality assurance following USGS National Field Manual technical policy (Anderson, C.W., 2005, Turbidity: U.S. Geological Survey Techniques of Water-Resources Investigations, book 9, chap. A6.7, https://doi.org/10.3133/twri09A6.7). The MAS filename includes the parameters used in the regression model and the start date. Over time, continued data collection at this site for the purpose of validating regression models may result in model updates for this data release. Waihi Stream is a main tributary to Manoa stream and transports watershed-derived sediment to the Ala Wai Canal in Waikiki near Honolulu, Hawaii. The gaging station is in upper Manoa Valley in a light residential/agricultural area and is 6.6 miles upstream of the confluence with Ala Wai Canal. Upstream of the gaging station is predominantly undeveloped tropical rain forest with a few private properties within the Honolulu Watershed conservation area.

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  "geospatial"
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