[GRASSLIST:1076] Curve Lines for Hydrology

[Johnny Duke]

Does anyone have a script to figure weighted curve numbers for
watersheds.

I have a request to do:
curve numbers for each polygon based on soils and land use.

weighted  =A,CN+A2CN2+....+AnCNn
  CN       _____________________
               Area Watershed


Where  A1= Area subpolygon 1
       An= Area subpolygon n

Area Watershed = A1+A2+A3+.....+An

Weighted  = Weighted Average
  CN         CN for whole Watershed Area

There will be three layers watershed soils and land use.

Thanks
Johnny Duke
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