average inflow of 6m^3/s from surface runoff. In the same period the outflow from the lake had an average value of 6.5 m3/sec. Further, in that month, the lake received a rainfall of 145 mm and the evaporation from the lake surface was estimated as 6.1 cm and seepage loss was 2.5cm in that month. The average lake surface is 5000 ha. Compute for the change in water elevation in the lake at the end of that

A lake had a water surface elevation of 110.00m above datum at the beginning of a certain month. In that month, the lake received an average flow of 66.0m3 /s from surface runoff sources. In the same period the outflow from the lake had an average value of 66.5m3 /s. Further, in that month, the lake received a rainfall of 150mm and the evaporation from the lake surface was estimated as 7.40cm. Write the water budget equation for the lake and calculate the water surface elevation of the lake at the end of the month. The average lake surface area can be taken as 5000ha. Assume that there is no contribution to or from the ground water storage

Determine the overflow rate, hydraulic detention time and the size of spherical sand particle (2.6g/cm3) which is 100% removed by 10 primary sedimentation tanks that operate in parallel to treat a flow of 0.7 m3/s with the following dimensions Length = 70m, width = 12 m and depth=3m.  Assume 20°C for the water temperature.

A lake with an area of 5 km2 has a net decrease in storage of 6 ha-mm. The inflowing stream rate is 2 m3/s while the outflow rate is 2.5 m³/s. If no rain fell during the month, what is the estimated total evaporation for the month? 2. (0.5. 36oor,24