Measurement of seepage at Newtown Creek, NY, May-June 2015

Rates of flow across the sediment-water interface (seepage), measured every 5 seconds with an automated seepage meter and summarized every minute with a digital datalogger, are presented for 17 measurement locations at Newtown Creek, NY. Final values are presented in cm/day. An electromagnetic seepage meter, custom made for USGS by Quantum Engineering, was capable of measuring seepage averaged each minute with an accuracy of +/- 0.5 cm/d. Deployments at each location lasted at least two tidal cycles. Three ESM systems were available but most of the time only two systems were operated simultaneously, requiring several weeks to obtain measurements at all 17 locations. Data are presented in an Excel workbook composed of 38 worksheets. The Intro and Explanations worksheets contain supporting data that describe the data and coordinates for the 17 measurement locations. The rest of the worksheets contain seepage data from the ESM, or tidal (stage) data from submerged pressure transducers installed either at the Turning Basin or at the Anchor QEA dock.