A lake with a surface area of 525 acres was monitored over a period of time. During a one-month period, the inflow was 30 cfs, the outflow was 27 cfs, and a 1.5-in seepage loss was measured. During the same month, the total precipitation was 4.25 in. Evaporation loss was estimated as 6.0 in, a) Estimate the change in storage for the lake during the month in inches. b) What should be the outflow to produce an opposite change in storage from the computed magnitude in (a), considering that there are no changes in the other parameters?

Determine the required area (in ft ) of a bioretention basin to service runoff from a shopping complex with 4   .2 acres of paved parking,   1.1 acre of sidewalks,   0.5 acre of landscaping.   The 24-hr design storm is 1 inch. Use the empirical coefficients in Small Storm Hydrology method. There is no underdrain pipe for the bioretention basin. Use the following guidelines for the design:   Ponding depth = 12 inch   Media bed: 36 inches deep, porosity = 0.30   Gravel bed: 24 inches deep, porosity = 0.36

Determine the water-application efficiency, the water-storage efficiency, and the water-distribution efficiency for the following conditions: stream of 80 lps delivered to the field for 5-hours, runoff averaged 40 lps for 2.5 hr, depth of root zone was 1.8 m, depth of penetration varied linearly from 1.8 m at one end to 0.6 m at the other end of the field.  Ans. 76.5%, 66.7%, 90.6%

Subject water resource