water irrigation

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Post on 25-Jul-2015

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1. / 2. 55.5 3 79.3 % 95 % 3. 6.1 3 / 7.5 3 / 4. 1.3 3 / 5. 9 2.6 807.5 2006 6. 2.5 3 1.3 3 7. 68% 2% 1% 2% 10% 9% 8% 8. 9. 1 -41994 2 -121984 3 -4882 4 - 5 - 6 - 7 - 10. 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 11. 1988 12. ( / ) 4.6 2.8 4 4.6 2.8 4 4.6 2.8 4 5.3 4.1 4.8 25.9 15.4 23.5 25.9 15.4 23.5 25.9 15.4 23.5 19.1 13.7 16.8 16.4 11 11.6 16.4 11 11.6 16.4 11 11.6 14.1 12.1 13.3 3 1.7 2.8 3 1.7 2.8 3 1.7 2.8 3.5 2.1 3 4.5 2.6 1.6 4.5 2.6 1.6 4.5 2.6 1.6 6.3 4.1 5.8 - - - - - - - - - 10.8 4.1 6 13. 14. . 15. - 16. ) DO( 0 2 4 6 8 10 )(/ 17. ) BOD( 0 2 4 6 8 10 12 14 16 18 20 )(/ 18. 0 50 100 150 200 250 300 350 400 )(/ 19. 20. ( ) 21. ( ) 22. :

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