By this method, the seawater intrusion degree can be classified according to the different ionicvalence molar concentration percentage of eight ions in the total ionicvalence molar concentration.
Electrovalence: valence characterized by the transfer of electrons from atoms of one element to atoms of another during the formation of an ionic bond between the atoms.
电价：在原子间形成离子键的过程中，由电子从一种元素的原子转移到另一种元素的原子所表示的价。
3
Field strength is calculated based on a valence of the metal cation and an ionic radius of the ion.