Effects of Seasonal Precipitation on the Amount of Seepage-A Case Study of Tunnel 3 of Bazai Irrigation Project Khyber Pakhtunkhwa

Infiltration of water into tunnel within a harsh geological formation is vital issue in tunnelling. The consequence impacts due to seepage include rock instability, pore-water pressure impositionand diminution operational capacity. spatial variation rainfall climate change intensifies the threat stability. Likewise, understand scenarios on 3 Bazai irrigation project wasnumerically simulated inSEEP/W software by manipulating data. net annual precipitation followed two sets data i.e., dry and wet season depending upon magnitude rainfall. analysis revealed that most occurred unlined portion. In order determine future ofprecipitation quantity, was further increased 10% 50% for A1B B2conditions respectively. quantity increases with patterns. To reduce risk stability, model also treated cement-bentonite grout bentonite slurry containing 6% solids. performance both grouting techniques leads noticeable deduction. study suggests more effective remediation.