At water EL = 7000 ft, Taal Lake has a volume of 2.4x10°m³ and a SA =Annual inputs to the lake includes 10 in. of rainfall, runoff inflow of 40,000 m/yr andungauged runoff and groundwater of 20,000 m/yr. Evaporation of 52 in per year. Findthe inflow, outflow and , in m/yr50,000m?.

Given: Water elevation, EL=7000 ft Volume of lake, Volume=2.4×106 m3 Surface Area, SA=50000 m2…

Answered: At water EL = 7000 ft, Taal Lake has a…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Example Problem Water budget for a lake provides following observations: Precipitation, P = = 43 in./yr. Evaporation, E = 53 in./yr. Inflow to Lake, Qin = 1 in./yr. Outflow from Lake, Qout = 173 in./yr. Change in Lake storage, AS = -2 in./yr. Find the net groundwater flow. Solution: E SWIn GWin PPT Evap SW Out GWout
Estimate the constant rate of withdrawal from a 1375 ha reservoir in a month of 30 days during which the reservoir level dropped by 0.75 m in spite of an average inflow into the reservoir of 500,000 m 3 /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. (answer must be in m^3/s with step by step solution)
Taal lake has five sub areas covering its entire catchment surface area. Its water surface elevation is 640m above mean sea level. During a storm event, data given below was recorded. Calculate the new water surface elevation after the storm event. Assume that there is no contribution to or from evaporation & infiltration. Sub Areas Area (km^2) Outflow runoff (cm) Inflow runoff (cm) PH Rainfall Advisory Talisay 58.55 61.00 42.00 RED San Nicholas 81.97 39.00 45.00 ORANGE Laurel 35.13 20.00 47.00 YELLOW Agoncillo 18.74 52.00 126.00 ORANGE Balete 39.81 32.00 20.00 RED The average outflow runoff is cm The average inflow runoff is cm The mean precipitation using Thiessen polygon method is mm The mean precipitation using arithmetic mean method is mm The new water surface elevation is m
5. A lagoon has a surface area of 250x106 m². The average annual rainfall and evaporation are obtained as 1800 mm and 1100 mm, respectively. If the increase in storage is 250x106 m³. yr-¹, obtain the net annual inflow into the lagoon. What are the hydrologic components included in the net inflow?
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.
Q3: A river catchment has a 2.0 hour unit hydrograph with the ordinates 0,3,11,35,55,66,63,40,22,9 and 2 m/sec. Assume that the base flow at time t=0 hour is 50 m/sec and linearly increases to 74 m/sec at t=24 hour. Compute the hydrograph resulting from two successive 2.0 hour periods of effective rainfall of 2.0 cm and 3.0 cm respectively.
The basin area has 8000 m^2, annual precipitation = 20 in/yr, annual streamflow = 5000 cfs. Use water budget method to estimate the annual evaporation.
Hydrology: i need the answer quickly i need all the steps, i need the answer in Handwritten.
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a. What is the inflow? b. What is the outflow?
9.4. A small farm reservoir behaves as two identical CFSTRS in series. Flow into the reservoir consists of runoff from pasture land having an average BOD, of 50 g/m³ and an average flow rate of 0.5 m³/s. Volume of the reservoir is 2.16 x 10 m³. If k = 0.2 d ¹ and k, = 0.35 dat 20°C. determine the dissolved-oxygen concentration if the water temperature is 20°C, the inflow is anaerobic, and steady-state conditions exist. lumetric

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At water EL = 7000 ft, Taal Lake has a volume of 2.4x10°m³ and a SA = Annual inputs to the lake includes 10 in. of rainfall, runoff inflow of 40,000 m/yr and ungauged runoff and groundwater of 20,000 m/yr. Evaporation of 52 in per year. Find the inflow, outflow and , in m/yr 50,000m?.