EXH0327020798

.... ETSIM Logical variable = T if evapotransp_r- ation (plant-roo__extra_ion_ _s _ h__ sim__l_at any time during the simu- lation; otherwise = F. Line B-15 is present only if BCIT = T or ETSIM = T. B-15 NPV Number of ET periods Uo be simulated. NPV values for each variable required for the evaporation and/or evapotranspiration options must be entered on the following lines. If ET variables are to be held con- stant throughout the simulation code, NPV = I. ETCYC Length of each ET period, T. Note: For example, if a yearly cycle of ET is desired and monthly values of PEV, PET, and the other required ET variables are available, then code NPV = 12 and ETCYC = 30 days. Then 12 values must be entered for PEV, SRES, HA, PET, RTDPTH, RTBOT, RTTOP, and HROOT. Actual values, used in the program , for each variable are determined by linear interpolation based on time. _ Line B-16 to B-18 are present only if BCIT = T. B-16 PEVAI Potential evaporation rate (PEV) at beginning of each ET period. Number of entries must equal N'PV, LT-I. To conform wi_h the sign convention used in most existing equations for potential evaporation, all entries must be greater than or equal to 0. The program multiplies all nonzero entries by -I so that the evaporative flux is treated as a sink ra_her than a source. B-17 RDC(1,J) Surface resistance to evaporation ($RE$) at beginning of ET period, L-_. For a uniform soil,…

Open full document

Upcoming Events

PSCAA Advisory Council Meeting Agenda
Add to CalendarMWednesday Mar 11, 9:00am - 11:35am
1904 3rd Avenue, Suite 105, Seattle, WA 98101
Call to order – Roll Call – Quorum Established – Land Acknowledgement We would like to acknowledge that our Agency operates in four present-day counties, which are the traditional lands of the Coast Salish people, past and present. This acknowledgement does not take the place of authentic relationships with indigenous communities in our jurisdiction and [...]