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Timing:the analysis will be performed before the end of the project and included in the final report. history,funding sources,how to cite the data,and any intellectual property rights or licensing Location:Results will be determined for the Project area and the whole Staten Island. considerations. Share Subsidence data and analysis will be integrated and synthesized in the project final report.Data will be Step 6: Data management plan made available for primary stakeholders and the scientific community in the delta.All groundwater monitoring data generated by the project will be reported in a manner that is compatible and consistent Entity responsible for the monitoring of subsidence and data management with the groundwater data systems administered by the State Water Resources Control Board(CWC 4 79704)and Department of Water Resources.Relevant data will be uploaded to GeoTracker GAMA. The Hydro Focus team will conduct measurements of subsidence and associated metrics,data analysis, Proof of successful data submission will be provided to CDFW Grant Manager. synthesis,and data sharing.Steve Deverel,Hydro Focus Principal,will serve as data manager. Manage Quality-Data QA/QC Design Before Data Collection We designed two sets of measurements of continuous monitoring of land subsidence for a 12-month LVDT instruments will be calibrated and adjusted for the elevation of the extensometers.NAD 88 period. Elevation will be manually checked with GPS relative to the neared benchmark.Data loggers will be Collect cleared and tested before deployment.Instruments will be covered with a protective barrier.Depth Data collected from routine field visits will be recorded on paper data sheets.Data from the field transducers will be tested at multiple water depths to develop a calibration curve.Instruments will be sheets will be entered into the Hydro Focus database with digitized scans of the original field sheets. recalibrated as necessary before deployment. Data and digitized field sheets will be entered as soon as reasonably possible after the field visit. Durine Data Collection Continuous data collected by the well transducers and at the extensometers will be downloaded at least Manual elevation readings will be taken at the extensometer once per month to ensure accurate once per month during routine field visits.During field visits all equipment will be checked and recordings.Equipment will be inspected for disturbances and the data logger functionality will be maintained as necessary.Summaries of all work performed during each site visit will be recorded in a checked for errors and stoppages.Depth to water will be recorded manually once per month and field notebook and digitized along with collected data.Notes will include the time of arrive, compared with transducer calibration curve.Transducers will be checked for recording errors.Elevation maintenance performed,and other concerns of current and future data collection. and transducer data will be downloaded at least once per month. Process During Data Entry Subsidence post processing and quality check,including gap filling and other modifications,will follow procedures outlined in Deverel et al.(1996)and Deverel et al.(2016). Raw data collected as elevations All downloaded and manually collected data will be entered as soon as possible after collection.Data relative to instrument position will be converted to actual land surface elevations.Depth to will be inspected for gaps and irregularities.Modifications s the datasincluding t will is documented.Raw data groundwater collected from wells will be converted to groundwater elevations using known reference wills saved unaltered.Statistical summaries will be processed,including tests for outliers.Outliers will elevations. be inspected for quality control.Rationale for removing any data points will be documented and reported.All data will be reviewed as soon as possible after collection to assess field collection methods Analyze and provide feedback to field technicians. Data will be analyzed to produce annual subsidence rates.Data from the two measurement locations will be compared to assess spatial variability.Progress toward hypotheses and project objectives will be A table describing the steps in data management starting from data acquisition to final outputs: assessed in the final annual analysis.Data visualization,interpretation,and analyses will be produced with each periodic report and will be used for sharing of results and publications. Activity Methods Freauencv Land surface Collection of Recorded every GHSI 750 LVDT on extensometer,manually Measured and modeled subsidence rates will be compared with previous studies on Staten island,other elevation continuous and 15 minutes;once with caliper Delta islands and with Delta wide LiDAR subsidence rate.The integration of the different datasets will measurements manual data per month validate monitoring of subsidence of the study,help establish baseline conditions,and help future download assessment of the effectiveness of project implementation. Data download Once per month Maintain Equipment Once per month All collected subsidence data will be stored in a database on the Hydro Focus local server.The database inspection and will be updated as data are received during project monitoring.Data will be stored on the Hydro Focus maintenance server for least two years after the project has ended.Data will be preserved for long-term storage and include metadata that detail the group responsible for the dataset,the context of the dataset,revision