Water Team

What We're Working on Now

At present, primarily, we are focusing on site repairs, data analysis and modeling. Higher than normal precipitation early in the wet season has resulted in larger volumes of stream discharge compared to previous years, but the warm weather ensured that sites were still mostly accessible by vehicle as of mid-December. The culvert weir at Speckerman North Creek in Sugar Pine has been removed to accommodate higher winter flows, and the designs for fabricating the additional culvert weirs in Last Chance for next summer have been finalized. In early December, a fallen snag struck the logger box and snow depth sensor on the north face of Fresno Dome Met Station and vandals damaged the solar panel, data logger and battery for the Big Sandy culvert instrument, requiring substantial repair and replacement. Much of the infrastructure for the wireless network around the Bear Trap Meteorological Station (Last Chance lower elevation met) has been installed, and are awaiting delivery of data loggers to be fully operational.

Data efforts are focused on detailed analysis of sediment patterns, water sources/flow paths, discharge measurement methods, and stream chemistry. Data processing for the 2012 water year is ongoing, and will be used for validating the calibrated parameters for Regional Hydro-Ecological Simulation System (RHESSys). Detailed analysis of the model equations used for limiting transpiration is currently being performed, and include physical and environmental attributes of soil saturation, direct light, indirect light, humidity, and leaf density. Parameters within these functions can be modified to match our understanding of transpiration in Sierra Nevada mixed-conifer forests, and helps ensure that the model has the correct response when the vegetation reduction from SNAMP treatments are implemented.

At the 2012 American Geophysical Union Fall Meeting, Sarah Martin presented results of localized sediment movement in the four study catchments and Ram Ray presented impacts of reducing forest canopy on the hydrologic cycle using RHESSys.

The water team workplan is available here. The most recent Water Team Report has been posted.

Updates

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Discussion

Kim_Ingram said at 11:07 a.m., 30 November 2010 ,

The following concerns and comments were brought up from a general public participant after the UC Water Team field trip ...

Kim_Ingram said at 10:32 a.m., 27 October 2009 ,

At the September 1st water field trip to the Last Chance site, a question was raised as to how much ...

Kim_Ingram said at 10:52 a.m., 3 September 2009 ,

The following question was submitted to the Water team for their consideration: Has SNAMP considered 'adapting' and having the water ...