Field Monitoring
One of our specialties at Balance Hydrologics is collecting and using direct field measurements when needed as a foundation for project analysis and decision making. A hallmark of our work has been the ability to measure (or "gage") the movement of water, sediment, and water-quality constituents in streams, lakes, ground-water basins and tidal systems, under a wide range of conditions. We have a recognized track record in collecting and processing data from our field monitoring efforts in an effective manner which conforms to federal and state agency norms and adopt them for specialized settings such as vernal pools or karst and headwater channels. These norms include standards of the Federal Interagency Sedimentation Program, which governs USGS, California DWR, USFS, and Army Corps of Engineers studies

Collecting reliable gaging records calls for an understanding of the continuous, and often unpredictable nature of hydrologic processes. Balance Hydrologics staff have traditionally been able to deploy storm monitoring teams and make appropriate observations and measurements necessary to validate the gaging record.

To better meet the specialized requirements of each gaging program, Balance Hydrologics owns a versatile array of surface and ground water monitoring equipment, and our staff are familiar with an assortment of client-owned field equipment. Examples include a range of dataloggers, discharge meters, sediment-sampling equipment and specialized probes used for measuring conditions of seeps and springs, streams, lakes, aquifers and sloughs, during all types of climatic conditions. Solar panel and battery arrays allow for installations in remote areas and demanding environments, and telemetry can give clients access to "real-time" data. Staff hydrologists are able to provide clients with basic data or interpretations, processed for input into their data management and/or GIS systems.
Areas of Expertise and Examples of Our Work (still under construction)
Real-time monitoring
  • Sample Station at Gazos Creek (for aquatic biologists)
  • Rainfall at Balance's office in Berkeley
  • Trubidity, specific conductance, dissolved oxygen and pH
  • Stream gaging (measuring flow in a creek)
  • Mean daily flows
  • Annual hydrologic records
  • Extremes and exceedance analysis
  • Changes in peak and low flows over time ('hydromodification')
  • Sediment transport gaging (measuring sediment discharge in a creek)
  • Suspended and bedload sediment
  • Sediment rating curves
  • Annual loads
  • Water quality monitoring and sampling
  • Depth-integrated sampling
  • Automated samplers (ISCO, Sigma)
  • Stream temperature and specific conductance (an index of salinity)
  • Gazos Creek
    Seeps and Springs
  • Isotope analysis and tracing
  • Microbial source tracking (MST) and general pathogen sampling
  • Watershed Management
  • Sediment-source inventory
  • Mineralogic tracing to sources
    Bank retreat and channel migration
    Debris flows and landslides
    Pool-sedimentation (scour/fill) assessments (V* and related methods)
  • Stream-bed conditions
  • Wolman particle-size surveys (pebble counts)
    Cobble embeddedness (bed-surface sedimentation)
    Cross-sectional and thalweg surveys (stream incision/aggradation)
    Scour monitoring (scour chains, fathemeters
  • Effects of riparian vegitation on inundation levels
  • Large wood and wood jams
  • Sediment storage
    Aquifer management
  • Surface and ground water interaction
  • Recharge and infiltration testing
  • Well yield testing and aquifer characterization
  • Multi-piezometer monitoring
  • Infiltration tests
  • Seep and spring continuity
  • Performance monitoring of mitigation measures and conditions of approval
  • measuring compliance with mandated flows and water levels
  • Detention basins
  • Water-quality ponds
  • Wetland habitat conditions
  • California red-legged frog ponds
    Vernal pools
    Hydro-period
  • Tidal wetland restoration
  • Inundation frequency/duration
    Tidal elevations
    Tidal prism modeling and calibration