A basin with 175 square km area receives 110 cm of rainfall per year. The mean annual flow from the basin is 2.5 cubic meters per second. What is the average annual evapotranspiration in cm/year?

6. Runoff from a 200 mile² catchment drains into a reservoir than has an average surface area of 4000 acres. The reservoir is to be used for municipal water supply. Annual rainfall over the watershed is 40 inches and the annual runoff is 2 inches. Evaporation from the reservoir averages 40 inches per year. If the surface area of the reservoir is roughly constant with depth, how much will the reservoir depth change in one year?

Q1/ If concentration of total dissolved salts in Shatt Al- Arab water C = 6000 (p.p.m) and Shatt Al-Arab discharges its water into Arabian Gulf at flow rate Q=200 (m³/s). Calculate weight of Total Dissolved Salts carried by water of Shatt Al-Arab annually into water of the Gulf. ONL

The figure shows the cross section of a levee that is 500 m long and is underlain by a 2-m-thick permeable sand layer. It was observed that the quantity of water flowing through the sand layer into the collection ditch is 250 m³/day. What is the hydraulic conductivity of the sand layer? Elv. 160 m Levee 1 Elv. 150 m 2 m Ditch 125 m I Impervious O Sand