Let average yearly evapo-transpiration and average yearly rainfall are 250 cm and 300 cm respectively. Calculate the yearly evapo-transpiration for forest catchment of Sydney. 187.84 cm 195.86 cm 178.89 cm 166.68 em
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- A hill slope receives with an area of 1.1 x 104 m2 receives precipitation for a period of 41 minutes with an average rainfall intensity of 32 mm/hour. The total surface water flow during the 41 minutes is 14.9 x 104 litres. Given that evaporation and percolation to the groundwater are negligible, determine the change in soil water storage in m3 for this event.Estimate the constant rate of withdrawal from a 1375 ha reservoir in a month of 30 days during which thereservoir level dropped by 0.75 m in spite of an average inflow into the reservoir of 0.5 Mm^3/day. During themonth, the average seepage loss from the reservoir was 2.5 cm, total precipitation on the reservoir was 18.5 cmand the total evaporation was 9.5 cm.Two and a half centimeters of rain per day over an area of 200 sq.km is equivalent to average rate of input of how many cubic meters per second of water to that area?
- Following is the recorded data of a 0.8 km2 wide lake collected over a year: It receives a total rainfall of 1400 mm, the surface inflow and outflow is 0.15 m3/s and 0.17m3/s respectively. If the surface elevation of lake reduces by 45 mm over the year, then determine the lake evaporation (in mm).Given is the hydrograph of 2 hour, find the unit hydrograph of 4 hours. The value of excess rainfall is 12 cm, Base flow =7The watershed above a particular site on a river has a drainage area of 77 700 hectares. The mean annual precipitation for this area is 812 mm. About 25 percent of the precipitation reaches the basin outlet as streamflow. Estimate the mean flow rate Q at that particular site on the river alternatively in units of cubic meter per year.
- Watershed area = 11.1 acres Average N concentration of inflow = 1.9 mg/L Total Rainfall = 44.75 inches Average N concentration of outflow = 1.4 mg/L Total pond inflow = 330,441 ft3 Average P concentration of inflow = 0.42 mg/L Total pond outflow = 288,492 ft3 Average P concentration of outflow = 0.23 mg/L Total pond volume = 46,893 ft3 (this is the volume to the top of the riser before overflow occurs) Answer the following questions: a) What percentage of the total rainflow flowed into the pond? b) If the pond were completely empty, how much rainfall in inches would be required to fill it to the total pond volume? Use your answer to question A to help answer this. c) What is the total Nitrogen load flowing into the pond in lbs/Acre/Year? d) How many lbs of Nitrogen did the pond remove over the year? e) What percentage of Phosphorous was removed by the pond?In a given month, a watershed with an area of 1500 m^2 received 100 cm of precipitation. During the same month, the loss due to evaporation was 15cm. Ignore losses due to transpiration and infiltration due to ground water. What would be the average rate of flow measured in a gage at the outlet of the watershed in m^3/day?For an irrigation project for an area of 10.000 km2 water has to be transported to compensate for natural evaporation. The total evaporation per year is the equivalent to a yearly rainfall of 30 cm. The water flows through an open channel of 100 km length from a lake 100 m higher than the irrigation area. The transport channel is 3 m deep but the water level is just 2 m. The channel has a rectangular shape and a friction factor of 4.10-3. Make an estimate about how wide the channel should be assuming steady-state conditions. The width of the channel is significantly larger compared to the water level height in the channel.
- A drainage basin has a area of 7322 km2. The average annual precipitation for this area is 909 mm. The average surface water flow at the outlet of the catchment is 21.4 x 108 m3/year and the average groundwater flow out of the basin is 94.6 mm/year. Assume trailing zeros are significant if present. Determine the annual average evaporation in mm/year. (give your answer to one decimal place)precipitation is 700mm of which 100mm is intercepted and evaporates ,100mmm runs off into stream . Of the remaining 500mm that infiltrates into the soil, 100mm percolates to the subsoil and recharges aquifers . Assume the maize crop has a total coverage of 100 hectares in a catchment,determine the contribution of the land to the annual downstream discharge of the catchment (note make use of all data given and give explanation)WATER RESOURCES ENGINEERING: Measurements of a water-balance have been made for a one-year period on a lake with an area of 0.8 km2 with the following results: P = 1400 mm, Qsi = 0.15 m3s-1 and Qso = 0.17m3s-1. The lake surface elevation, h, at the end of the year was 45mm lower than at the beginning. What is the estimate (in mm) of the lake evaporation for that year?