Tank Drain QA Methods

• Summary of drain quality checks
  • Why are we draining and why does it matter?
    • Key factors of how precipitation is captured and measured
    • Melting frozen precip
    • How do drains affect quality
  • How big an impact does this have
  • Quality Checks/Rules
    • Examples
      • Archetypal problem
      • Rain or recharge
  • Key take aways
• Rain during drains
  • GCE flags
  • CS2MET Test case
    • Quick detour to create a timeseries for all NOAHIV columns
    • Tot >= precision
    • Tank below instrument
      • GCE flagged but wrong value
    • No accum during drain
      • How to find drains
      • Recharge Standardized May 2019
      • Investigate drain/recharge situations
      • Separate recharge from real rain
      • Separate drain from recharge
    • Test Drain and Recharge Rules
      • Get all years
      • Program Rules
      • Testing