ESPAM2 Water Budget Status ESHMC 21 September 2010 B. Contor

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What do I mean by "water budget?" All required input to MKMOD MKMOD calculates all flux across land surface EXCEPT TARGETS Target fluxes are applied separately –spring discharges –Snake River gains and losses Aquifer heads provide additional targets

15 Files Comprise the "Water Budget" E100910A.cel E100910A.cnl E100910A.div E100910A.ent E100910A.eff E100910A.eti E100910A.fpt E100910A.iar E100910A.mdl E100910A.nir E100910A.off E100910A.pch E100910A.pre E100910A.red E100910A.sol E100910A.trb

E100910A.cel This file contains the square footage of each model cell, and whether the cell is active or inactive. It reflects the boundary changes Allan presented last spring.

E100910A.cnl This file contains the cell locations and leakage fractions for model cells with leaky canals. Nearly all entities have one or two major canals represented as leaky. The data set accommodates time-varying leakage, but I have held them constant for all stress periods, per the Ad Hoc memo.

E100910A.div This file contains diversion volume for each surface-water entity, for each stress period. Returns are zeroed as a fail-safe for the On- Farm algorithm.

E100910A.ent This file contains information about the surface-water entities and groundwater polygons (entities) to which all irrigated parcels are assigned. –water source –ET adjustment factors –Sprinkler percentage (and changes through time)

E100910A.eff I know nothing. Ask Allan & Willem.

E100910A.eti This file contains unique irrigated-et depth for every cell, for every stress period –MKMOD decides when, where and how to apply it –Based on National Ag Statistics Service crop mix and ET-Idaho evapotranspiration depths.

E100910A.fpt FPT means "fixed point" Any flux that is independent of MKMOD calculations is eligible –wetlands –urban/industrial areas –exchange wells WD 01 Mud Lake Some indelicacy with data flags

E100910A.iar Irrigated lands by model cell –square feet, entity, source, source fraction Four data sets: 1980, 1992, 2000, 2006 We're knocking on the door of 2002 completion Possibly in the near future we will attempt a repair of 1986?

E100910A.mdl Model simulation data –Brief background information –stress period lengths –Rows, columns, layers –PEST multipliers for non-irrigated recharge, by soil type –PEST multiplier for fixed points with flag "W"

E100910A.mdl (2) "ESPAM2 water budget using NIR values (ESPAM1 algorithm)from Contor, 3 June Reflects round 2 adjustments, corrections to irrigated lands, zero returns as failsafe for on-farm. Identical to P100827A except for refinements described in E100910A.readme.txt. No *.eff file supplied by IWRRI."

E100910A.nir Non-irrigated recharge depth One value for each model cell, for each stress period Depends on general soil type and precipitation depth Non-linear ESPAM1.1 algorithm was applied to PRISM precipitation depths

E100910A.off Offsite groundwater pumping This means the wells are distant from the irrigated lands MKMOD uses the pumped volumes in irrigated-lands and canal-seepage calculations Differ from exchange wells in that exchange-well volumes are already in the diversions data

E100910A.pch Perched river seepage Unique value for each model cell, for each stress period This is actually all non-Snake seepage, whether perched or not. No Snake-River seepage is included, whether perched or not. –Snake seepage is included in calibration targets

E100910A.pre Precipitation depth for every model cell, every stress period. Used in irrigated-lands calculations MKMOD also uses for sense check w/ non- irrigated recharge Data are from PRISM

E100910A.red Reduction for non-irrigated inclusions One value for each stress period, for sprinklers and for gravity –we didn't have enough data so all the sprinkler values = gravity values Calculated by comparing hand-drawn polygons with data-set polygons in a statistical sample (100 one-mile squares) for all irrigated lands data sets.

E100910A.sol Generalized soil type by model cell –lava rock, thin soil, thick soil Based on RASA 1406 (Garabedian) maps Used in selecting parameters for *.nir calculation Used to assign PEST multipliers –Currently set to 11 zones

E100910A.trb Tributary valley underflow Annual values based on RASA 1406 no intra-year variability –we know it exists but we don't have adequate data inter-year variability based on dampened Silver Creek hydrograph –Silver Creek is spring-fed at the mouth of a tributary basin

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