Measurements of a water-balance have been made for a one-year period on a lake with an area of 0.8 km? with the following results: P = 1400 mm, Qs = 0.15 m's and Qo = 0.17m's". 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?

Measurements of a water-balance have been made for a one-year period on a lake with an area of 0.8 km? with the following results: P = 1400 mm, Qs = 0.15 m's and Qo = 0.17m's". 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?

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter6: Hydraulic Conductivity

Section: Chapter Questions

Problem 6.15P

See similar textbooks

Similar questions

A reservoir with a constant surface area of 5.8 km has an elevation of 207.6 m above (mean sea level) MSL at the beginning of the week.Meteorological measurements made at reservoir for the week indicate that the total precipitation accumulation was 101.6 mm and the total evaporation was 72.2 mm. Also, hydrologic measurements made at reservoir indicate that the average river inflow rate is 34.0 m3/s, and the average outflow rate is 26.6 m'/s. Estimate the lake elevation (in m above MSL) at the end of the week.
The dam shown has a base of which 2m below the ground surface. The pressure distribution diagram at the base of the dam can be obtained from the equipotential lines as follows: k=4.5 m/day. if H=6m determine the seepage through the foundation.
A small shallow reservoir has a surface area of 150 square meters is used to estimate the average daily evaporation. The average values of climate parameters during a week are the following: water temperature is 34 degrees Celsuis, relative humidity of 0.3, wind velocity at 1.0 meter above ground surface is 4.444 m/s. Use the Meyer's formula to get the average daily evaporation. Also, compute the total volume of water lost due to evaporation daily.
Estimate the outflow from a 2500 hectare lake in 20 days during which the lake level dropped by 105cm, an average inflow into the lake 5x10^5 m^3/day.During 20 days, the seepage loss from the lake was 5.5cm,total precipitation on the lake was 0.25m while the total evaporation was 15mm. Give final answer in m^3/s.
A lake with a surface area of 4800ha had a water surface elevation of 95m above reference datum at the beginning of the year 2021. Since then the lake received an average inflow of 5.6m³/s. Further. In the entire month of January, the lake received a rainfall of 140mm and 135mm in February, and the evaporation from the lake surface was estimated as 5.85cm. Write the water budget equation for the lake and calculate the water surface elevation of the lake at the end of February. Assume that Infiltration loss is Insignificant for the lake. Please provide me proper solutions
As the depth chnges negatively means decreasing , can you please explain what are some measures to reduce the evaporation as to reduce the decreasing depth
A 300-mm diameter test well penetrates 27m below the static water table. Water is pumped at the rate of 69 liters per second for 24 hours. The water levels at two observation wells 35m and 95 m from the well were lowered by 1.10m and 0.50m, respectively. Which of the following most nearly gives the transmissivity of the aquifer?
For a homogeneous earth dam 52 m high and 2m free board, a flow net was constructed and following results were obtained:Number of equipotential drops= 25Number of flow channels 4The dam has a horizontal filter of 40m length at its downstream end. If coefficient of permeability of the dam material is 3x 10 cm/sec, then find thedischarge per meter length of the dam.
In a constant head permeameter with cross section area of 10cm2 when the flow was taking place under a hydraulic gradient of 0.5. the amount of water collected in 60seconds is 600cc.find the permeability of soil.
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?
Mangla Lake had a water surface level of 650 m above a datum at the beginning of a certain month. In that month the lake received an average inflow of 250 cumecs. There was an outflow of 150 cumecs. In the same month, the lake received a rainfall of 150 mm and the evaporation from the lake surface was 5 cm. Using the hydrologic equation, estimate the water surface elevation of the lake at the end of the month. Assume the lake surface area as 450 hectares and that there was no contribution to or from the groundwater storage.
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.