DWR_2982737

• Title: ET WORKSHOP 2016: DEFICIT IRRIGATION OPTIONS IN COLORADO AND NEED FOR ET MONITORING
• Author/Source: JON ALTENHOFEN, P.E.
• Author/Source: NORTHERN COLORADO WATER CONSERVANCY DISTRICT
• Keywords: EVAPOTRANSPIRATION, ADI, DEFICIT IRRIGATION, BUY AND DRY, GROUNDWATER, RETURN FLOWS, MONITORING
• Document Type - Reference Library: Presentations
• Document Date: 10/13/2016
• Year: 2016
• Team/Office: Modeling

Determining ETstressed---
Crop transpiration = Ks x Gc x ETref

CWSI = (Tleaf-Twet) / (Tdry-Twet) and
Ks = 1 - CWSI
Gc (% ground cover) by light stick

Visual Index for stress and
Ks; leaves upright and
curling