Year 2013, continuous measurements, every 15 minutes, were made of stage, water temperature in Cart Creek, Newbury, MA, a small headwater stream draining a mainly forested catchment (55% forest + 19% wetland) in the Parker River watershed. Discharge is determined from stage using discharge vs stage regressions.
Depth and water temperature were measured using a HOBO data logger deployed in a stilling well. Depths are corrected for barometric pressure changes using readings in an additional HOBO datalogger deployed at Marshview Farm. The HOBO is deployed in a a PVC tube, which was attached to ree-bar driven into the stream bed. The PVC tube has holes drilled to allow adequate water circulation.
ADDITIONAL RESEARCH LOCATION COORDINATES:
In addition to the decimal degree coordinates given above, locations are also given here in Massachusetts State Plane coordinates. The stream is called Cart Cr. and is located in Newbury MA. Some residential area is present. (~ 10% of the basin). In addition, I-95 passes through the center of the catchment, resulting in roughly 8% impervious surface area
STATION STATE X STATE Y
YSI-CC 247680 946790
NOTES AND COMMENTS:
Prior to July 2009, velocity measurements were made using a Marsh McBirney current meter. After that, a Sontek Flowtracker was used.
Discharge estimates in Cart Cr. are based on a power rating curve that contains measurements up to a depth of 0.834 meters, which is above bankfull stage.
The rating curve has an R2 of 0.95 using 32 measurements between Summer2007 and Fall 2011.
Measurements collected after 2011 confirm the same rating curve is applicable.
The column Depth_Device is included when combining files from several years, over which several different devices were used to calculate depth. HOBO_Depth is the depth that is standardized across all measurement devices so that a single rating curve can be applied.
CALCULATIONS: Discharge (l/s) = 1074.5*Depth^7.6501 where Depth is HOBO_Depth
Periodic with improvement of rating curve, particularly as more high discharge events are incorporated.
This file was compiled in 2/2013
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