Presentation on theme: "Snowpack Monitoring: Past, Present, and Future James H. Porter, Ph.D. NYCDEP 19 September 2013 Watershed Science and Technical Conference Hotel Thayer,"— Presentation transcript:
Snowpack Monitoring: Past, Present, and Future James H. Porter, Ph.D. NYCDEP 19 September 2013 Watershed Science and Technical Conference Hotel Thayer, West Point, NY
2 NYCDEP Snowpack Monitoring We used to do it. We still do it. We’re gonna keep doing it.
3 NYCDEP Snowpack Monitoring The End.
4 Why measure snow?
5 Uses of Snow Data Estimate potential runoff into reservoirs Required for reservoir operations under FFMP Transitioning to runoff model system using OST Used under Ashokan Interim Operating Protocol Climate change assessment Shared with NWS to assist river forecasting
6 Collaboration with NWS
8 History Program started in 1930s Data from 1960s to present Melted-snow method NEED PHOTO OF WATER SUPPLY NEWS WITH MENTION OF SNOW SURVEY…OR SOMETHING…
11 Snow Cores Follow Natural Resources Conservation Service protocol Mt. Rose snow tubes Biweekly – Northeast Regional Climate Center schedule Supplemental surveys if deemed necessary Data shared with many stakeholders and NOAA NWS
12 Snow Core Method
13 Snow Core Method
14 Snow Core Method
15 Snow Core Method
16 Snow Pillows Measure water equivalent of snowpack Developed in the 1960s SNOTEL network in western U.S. Used antifreeze New design measures weight of water – no antifreeze Note data shared with NWS, show NOHRSC table and some plots
17 Original Snow Pillow Design
18 Original Snow Pillow Design
19 Load Cell Pillow – Prototype
20 Load Cell Pillow – Modified Design
21 Load Cell Pillow – Modified Design
22 Load Cell Pillow – Modified Design Provide near-real-time data Data shared with NWS Current: 14 stations Future: 35 stations Several year effort Working with NWS on locations 22
Objective: develop methodology to use remotely sensed data in combination with in situ observations to provide the most accurate possible estimate of snow cover in the New York City water supply basins Satellite data: AMSR and MODIS products DEP snow pillows DEP biweekly measurements Intensive, targeted snow surveys by CUNY students NWS National Snow Analysis products