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. . f.=> :.:) '"-J Column 5. The column ,-I same as one. (~ Column 6. The same as column three. Column 7. The drain flows are based on either mean daily flows or grab samples, or a combination, depending on available data. The qualities are based on electrical conductivity or grab sample data, and are flow weighted. Column 8. Ungaged outflows via cobble aquifer, alluvial material, or boundaries. Columns 9, 10, 11. Evapotranspiration rates for crops are found by Jensen-Raise procedures as modified by USBR, based on data available from the Gobbo Farm weather station. Non-Crop, vegetative rates were estimated based on variOUS sources. Non-vegetative (M&I) used was provided by the Water Resources Branch. Column 12. Column 14 - Column 15. Column 13. The unaccounted drain water (28+17+20+25-19-7-8+2+runoff from precipitation) Column 14. The sum of the inflows Column 15. The sum of the outflows Column 16. The quality The diversions are measured or estimated by Q/A relationships. is assumed equal to that of column one. Column 17. The canal spills are calculated as (Column 27) using measured or estimated data. by the user. a percent of wastewater The percent must be adjusted Column 18. Canal leakage is an input. The source of the number will have to be based on whatever information is available. Seepage is considered to be a function of the wetted perimeter and a !'seepage rate." A first approach will be to develop Wetted Perimeter versus Q relationships. The quality is assumed the same as the inflow quality. Column 19. The tailwater and lateral spills returning to the canal system are found as a percent of the wastewater based on measured or estimated flow. Column 20. Same as column 17. Column 21. Same as column 18. Column 22. Residual (-6+3+1-20-21) Column 23. Same as column 18. Column 24. Residual (22-23 ) Column 25. Residual (24-26-9)