Fig. 16. Calculated water content profiles for the Texas CBET system. All values shown are in millimeters and represent total water storage values over the intervals indicated by associated arrows. Heavy and thin solid line pairs converging at the zero height represent water content profiles for zero and unit downward total head gradient conditions, respectively. The pair of lines converging at 0.34 m³ m^–3 water content represent profiles with a capillary barrier located at the zero height having a breakthrough water content equating to –0.3-m head. The two lines converging at 0.21 m³ m^–3 water content represent profiles without a capillary barrier and water content at the zero height equating to a prescribed flux of 1 mm yr^–1. Dashed lines represent wilting point water content profiles for uniform head conditions ranging from –150 m (long dash) to –500 m (short dash). Abrupt shift in water content near the top of each profile indicates transition from topsoil to subsoil.