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ESPAM2 Water Budget Status

ESPAM2 Water Budget Status. ESHMC 21 September 2010 B. Contor. !. 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

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ESPAM2 Water Budget Status

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  1. ESPAM2 Water Budget Status ESHMC 21 September 2010 B. Contor

  2. !

  3. 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

  4. 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 15 Files Comprise the "Water Budget"

  5. 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.

  6. 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.

  7. 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.

  8. 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)

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

  10. 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.

  11. 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

  12. 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?

  13. 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"

  14. E100910A.mdl (2) "ESPAM2 water budget using NIR values (ESPAM1 algorithm)from Contor, 3 June 2010. 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."

  15. 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

  16. 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

  17. 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

  18. 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

  19. 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.

  20. 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

  21. 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

  22. Party Responsibly!

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