Reasonable soil model is critical for DC ground pole design

so when rivers and lakes are very near to DC ground pole

it is necessary to consider the effects of rivers and lakes on the DC ground pole design. A boundary element method is used to analyze and calculate the effects of rivers and lakes on the potential distribution

step potential and diffuser current distribution of DC ground pole

indicates that it is needed to consider the impact of rivers and lakes in the DC ground pole design. Layered soil containing rivers and lakes

namely

layered soil containing soil with massive texture

is equivalent to soil with massive texture

and the potential difference between the two is than 3% when the crumbly area is 100 times of DC ground pole area

which proves less the equivalent method reasonabilty and feasibilty. Thereby

the potential distribution and electric field distribution near the DC ground pole are calculated using the boundary element method. Calculation of a DC ground pole shows that there may be security issue of human and animal in river near the DC ground pole. It is suggested that increasing the depth of DC can ensure the safety of human being and animals.