Adaptive harvest management for the Svalbard population of pink-footed geese: 2018 progress summary

Johnson, Fred A. ; Jensen, Gitte Høj ; Clausen, Kevin K. ; Madsen, Jesper

AEWA European Goose Management

学科分类：地球科学(综合)

美国|英语

来源: USGS Publications Warehouse

【 摘 要 】

In 2005, the U.S. Geological Survey began a cooperative study with New York City Department of Environmental Protection to characterize the local groundwater-flow system and identify potential sources of seeps on the southern embankment of the Hillview Reservoir in Westchester County, New York. Groundwater levels were collected at 49 wells at Hillview Reservoir, and 1 well in northern Bronx County, from April 2005 through November 2016. Groundwater levels were measured discretely with a chalked steel or electric tape, or continuously with a digital pressure transducer, or both, in accordance with U.S. Geological Survey groundwatermeasurement standards. These groundwater-level data were plotted as time series and are presented in this report as hydrographs. Twenty-eight of the 50 hydrographs have continuous record and discrete field groundwater-level measurements, 22 of the hydrographs contain only discrete measurements.