|   无提升措施  |       有提升措施  |    ||||
|   排水能力  |       管道数目  |       所占比例  |       排水能力  |       管道数目  |       所占比例  |    
|   P = 1 a以下  |       26  |       41.94%  |       P = 1 a以下  |       3  |       4.84%  |    
|   P = 1~2 a  |       6  |       9.68%  |       P = 1~2 a  |       6  |       9.68%  |    
|   P = 2~3 a  |       4  |       6.45%  |       P = 2~3 a  |       1  |       1.61%  |    
|   P = 3~5 a  |       6  |       9.68%  |       P = 3~5 a  |       12  |       19.35%  |    
|   P = 5~10 a  |       5  |       8.06%  |       P = 5~10 a  |       4  |       6.45%  |    
|   P = 10 a以上  |       15  |       24.19%  |       P = 10 a以上  |       36  |       58.06%  |