
%0 Journal Article
%A Sharma, KD 
%T Modified runoff curve numbers for bare crust forming sandy soils
%J Soil Research
%D 1987/12/01
%V 25
%N 4
%P 541-545
%K 
%R https://doi.org/10.1071/SR9870541
%U https://www.publish.csiro.au/paper/SR9870541 
%X Runoff curve numbers (CN) for bare crust-forming sandy soils in the Indian Arid Zone were derived from rainfall and runoff data recorded over a period of 7 years from 1975 to 1981. Contrary to the Soil Conservation Service (SCS) handbook value of 77, the actual optimized CN for 0.5% and 5-10% slopes were found to be 87 and 91, respectively, indicating a greater volume of generated runoff from these soils than estimated by the SCS method. The handbook CN value underpredicted runoff by 47-68% for storms >100 mm and 163-400% for storms <25 mm. A significant correlation (r = 0.898, n = 227) was found between the observed and predicted values using a modified CN based on the measurements. 
