See water_a_b_bb_forOliver.xls
for details 
Col 2 = awat (m2 mgChl-1)
Col 3 = bwat 
Col 4 = USE 0.5 for bb:b ratio 
Format I5,F15.4,1F10.5
  400 0.0053          0.00712    
  425 0.0048          0.00581    
  450 0.0085          0.00450    
  475 0.0117          0.00356    
  500 0.0223          0.00287    
  525 0.0422          0.00231    
  550 0.0554          0.00193    
  575 0.0826          0.00165    
  600 0.2095          0.00140    
  625 0.2848          0.00115    
  650 0.3530          0.00094    
  675 0.4552          0.00075    
  700 0.5507          0.00070