S1和S4点位验证误差均在20%以内，这是因为这两点位水质较好，特别是

The verification errors of S1 and S4 points are both within 20%. This is because the water quality at these two points is better, especially the water quality at point S1 is not much different from that of the indoor test water, and the verification error at point S3 is within 30%. It is because the S3 point is in the buffer period after the Lean River flows into the Dexing Copper Mine wastewater, and the pH of the water body is still affected.

S1 and S4 point verification error are within 20%, because the water quality of these two points is better, especially S1 point water quality and indoor test water quality is not much different, S3 point verification error is within 30%, because S3 point is in the Le'an River into dexing copper mine wastewater buffer period, water pH impact is still,

The verification error of S1 and S4 points are within 20%, which is because the water quality of these two points is better, especially the water quality of S1 point is not different from that of indoor test water, and the verification error of S3 point is less than 30%. This is because S3 is in the buffer period after Le'an River flows into Dexing copper mine wastewater, and the impact of water pH is still within,<br>