Paper Details

This research has addressed typical geological complexities through performance evaluation ofselective foundation seepage control features for embankment dams. Many researchers like Pack (2000)introduced use of hazard/factual examination through proper site-explicit designing evaluations as the standardmethodology for foundation assessment of dams regardless of the restricted extent of examinations. In thatcapacity, 2-DQseepage examination replicas for heterogeneity foundations either utilize a similar foundationwith a careful K-esteem/K-work related with two-sheet methodology, for example a prevailing foundation sheetby moderately permeable region in middle. The haphazardness of deposition conditions identified with greatestheterogeneity foundations isn't tended to all things considered for traditional 2-D drainage examinations.The study is based on case history of Satpara Dam Project founded over moraine deposits. Seepage modellingwas carried for ‘as-designed’ seepage mitigation measures under 2-D sectional flow model for different casescenarios using Plaxis 8.6. Availablelprojectldatalfrom Sevenlyearsloflconsecutiveloperation showed thatconservation level and consequently a steady state condition was not achieved. Model study shows that as theWater level increases the seepage value increases simultaneously whereas, real time data collected shows thatseepage decreases with the passage of time so both are inversely proportional to each other. Actual Seepagepercentage has reduced upto 13% corresponding to the same levels achieved during the last seven impoundingwhich shows that with time seepage reduces. Data for almost 80 instruments was used to develop state reservoirand the analysis was done by taking level for a particular period which was retained for at least 5 days for thelast 6 impounding’s. Model study shows that as the Water level increases the seepage value increasessimultaneously whereas, real time data collected shows that seepage decreases with the passage of time so bothare inversely proportional to each other. It was observed that during the course of operation of the Dam theseepage measured indicating that seepage control measures taken for the dam is effective and working properly.

Shoaib Ur Rehman Afridi, Dr. Irshad Ahmed, Zafar Abbas, “COMPARISON OF PRE-CONSTRUCTION AND POST CONSTRUCTION SEEPAGE FOR 17.4 MW SATPARA DAM PROJECT, SKARDU”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 7, Issue 5, pp. 47-54, May 2020.