Evaluating techniques for estimation of Flood Frequency and Hydraulic structures Efficiency for Suspended Load at Kalam and Chakdara Gauge Stations; River Swat, Pakistan

Pakistan is facing to several hazards, but the problem of frequent floods has been causing enormous damages to lives and other properties. River Swat falls in the Hindukush region, North-west-Pakistan which is a perennial river in the northern region of Khyber-Pakhtunkhwa Province, Pakistan. The study was designed to evaluate hydrologic and hydraulic aspects of Swat River at Kalam and Chakdara station. The study is important for its useful information on hydrologic and hydraulic feature of the River for floods and disaster mitigation in the future. The study was focused on flood frequency analysis in River Swat at Kalam and Chakdara Gauge Stations using Gumble Flood Frequency analysis method, analytical method and Foster-I method for the design of a permanent hydraulic structures on 100 years recurrence interval. To pursue our objectives we used 41 years water flow/discharge data for both the stations. The results showed that Foster-I is comparatively best method for the design of permanent structure on locations, i.e. Kalam and Chakdara station. However the empirical equations developed for Swat River at both locations to predicted hydraulic characteristics such as sediment characteristics for suspended load and the bed load was non-significant, predicted through Einstein procedure.