METHOD
•   The soil attributes and the corresponding weights used for calculating the vulnerability index for pollution by runoff (surface waters) are:
•Dominant parent material. For “Detrital formations”, “Crystalline rocks and migmatites” and “Volcanic rocks” the weight is 1.
•Dominant surface textural class and Dominant sub-surface textural class. If the codes for surface and sub-surface textural class are “Fine” or “Very  Fine” than the corresponding weight is “1”.