1. Using Hydro1k to Delineate River Basins

2. Method 1:
Use Hydro1k Basin Delineations
Best for larger basins
faster process

4. :LEVEL1=2

5. :LEVEL1=4

6. :LEVEL1=6

7. :LEVEL1=8

8. :LEVEL1=1

9. :LEVEL1=3

10. :LEVEL1=5

11. :LEVEL1=7

12. :LEVEL1=9

13. :LEVEL1=0

14. :LEVEL1=1

15. :LEVEL2=12

16. MERGE

17. REVERSE SELECTION

18. Delete

19. grid

20. gridclip global_dem colum_dem cover colum_del

21. Method 2:
Use ArcInfo Functions to Delineate a Basin
Any size basin – all small watersheds
Uses a high-resolution DEM to delineate
Hydro1k elevation data, lambert azimuthal projection
Gtopo30 – 30 arc-second elevation data, already in geographic projection