total of 10 mm of rainfall fell on a lake with a surface area of T km^2 in June 1996. Related the average flow rate of the stream entering the lake per month is 12 m^3 / s, while the average flow rate of the stream leaving the lake is 7m^3/s dir. Monthly evaporation height measured in an evaporation pan near the lake during this month 45mm and the pan coefficient in the relevant month is 0.75 according to what is the volume of water in the lake in this month calculate that

total of 10 mm of rainfall fell on a lake with a surface area of T km^2 in June 1996. Related the average flow rate of the stream entering the lake per month is 12 m^3 / s, while the average flow rate of the stream leaving the lake is 7m^3/s dir. Monthly evaporation height measured in an evaporation pan near the lake during this month 45mm and the pan coefficient in the relevant month is 0.75 according to what is the volume of water in the lake in this month calculate that

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.4P

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Q2: At the beginning of a given day a reservoir has a surface area 30 km². The inflow to the reservoir during the day was measured to be 65 m³/s. In addition, the day was dry and the seepage is 5% of the inflow. Assume the area of the reservoir does not change significantly by the end of the day. Determine the reservoir evaporation in mm/day where the reservoirs level is decreased 3.5 cm and the pan coefficient is 0.8?
Please be clear with your solution and write an explanation for every formula and solution. Problem:Laguna Lake has a surface area of 708,800 sq.m. Based on collected data, Pasig river flows into the lake at an average rate of 1.5 cu.m/s and the Paranaque river flows out of the Laguna lake at an average rate of 1.25 cu.m/s during the month of June. The evaporation rate was measured as 19.4 cm/month. Evapotranspiration can be ignored because there are few water plants on the shore of the lake. A total of 9.1 cm of precipitation fell this month. Seepage is negligible. Due to the dense forest and the gentle slope of the land surrounding the lake, runoff is also negligible. The average depth in the lake on June 1 was 19 m. What was the average depth of June 30?
Q#3: {10} The following are the monthly evaporation data in cm in a certain year (Jan.-Dec.) in the vicinity of a lake: 18.7 16.1 19.9 27.0 29.5 24.4 19.7 19.2 20.2 22.5 18.7 17.4 The water spread area in the lake in the beginning of January was (2.0 +123) square kilometer and at the end of December was (1.6+123) square kilometer. Calculate the loss of water in million cubic meter due to evaporation in that year.
Q₂: A) At the beginning of a given day a reservoir has a surface area 30 Km. The inflow to the reservoir during the day was measured to be S0m/s and the reservoir outflow was measured as 15m/s. In addition, the day was dry and the seepage is 10% of the inflow. Assume the area of the reservoir does not change significantly by the end of the day. Determine the reservoir evaporation in mm/day where the reservoirs level is decreased 2 cm?
The catchment area of an irrigation reservoir is 60 km^2. The constant water spread during October 2006 was 2 km^2. During that month, the uniform precipitation over the catchment was recorded to be 100 mm, 50% of precipitation reaches the reservoir. Outflow at a constant rate of 1 m^3/sec was recorded in the month of October. Assuming seepage losses to be 50% of the evaporation losses. Find out the daily rate of evaporation (mm/day/m*2) for October 2006. (Note: The number of days in the month of October is 31 days) ≈3.441 mm/day/m*2 ≈8.825 mm/day/m*2 4.344 mm/day/m*2 ≈6.445 mm/day/m*2
'The following were the monthly evaporation data in cm in certain year (Jan.-Dec.) in the vicinity of a lake: 16.2 15.3 16.9 27.5 24 21.4 15.7 16.2 16.2 20.5 15.7 19 The water spread area in the lake in the beginning of January was 3.2 km² and at the end of December 2.6 km?. Calculate the loss of water in million m3 due to evaporation in that year. Assume a pan coefficient of 0.71.
Q1: In a specific month a lake received an average inflow of 15 m/s from surface runoff while the outflow from the lake had an average value of 2 m/s. Further, in that month, the lake received a rainfall of 265mmn and the evaporation from the lake surface was estimated as I cm. The average lake surface area can be taken as 9000 ha. The initial water level was 50 m at the beginning of the month. What is the water level of the lake by the end of this month?
The following were the monthly evaporation data in cm in certain year (Jan.-Dec.) in the vicinity of a lake: The water spread area in the lake in the beginning of January was 3.2 km2 and at the end of December 2.6 km2 . Calculate the loss of water in million m3 due to evaporation in that year. Assume a pan coefficient of 0.71.
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.
Q1: A lake had a water surface elevation of 103.7 m above datum at the beginning of a certain month. In that month the lake received an average inflow of 6 m/s from surface runoff. In the same period the outflow from the lake had an average value of 6.5 m/s. Further, in that month, the lake received a rainfall of 145 mm and the evaporation was estimated as 6.1 cm. Calculate the water surface elevation of the lake at the end of the month. The average lake surface area can be taken as 5000 ha and the catchment area is 35000 ha.
Estimate the constant flow rate of withdrawal from a 15 km² reservoir in a month (30days) during which the reservoir level dropped by 1 m despite an average inflow into the reservoir of 0.95 * 10 m³ /day. During the month, the average seepage loss from the reservoir was 4.5cm, the total precipitation on the reservoir was 19.5cm, and the total evaporation was 7.5cm.
In a month of 30 days, the water level of a 1375-ha reservoir dropped by 0.75m in spite of an average inflow reservoir of 0.5 cu. Mm/day. During the month, the average seepage loss from the reservoir was 2.5 cm, total precipitation on the reservoir was 18.5 cm and the total evaporation was 9.5 cm. 1. Estimate the constant rate of withdrawal from the reservoir in m3/sec.