A retention reservoir is located so that all runoff from upstream catchment area passes through the reservoir. The catchment area (reservoir not included) is 9536/100 ha. The reservoir area is 1.0 ha. Infiltration through the bottom and sides of the reservoir is negligible. The discharge out from the reservoir is regulated at a constant Q = 0.045 cumec. Mean precipitation in July is 178 mm and mean inflow to the reservoir during the same month is 95000 m³. Mean evaporation from the lake surface in the month of July is 3.1 mm/day. a. What is the average July runoff coefficient? b. In July 1991, precipitation was slightly higher than normal, P = 9536/35 mm. what is the total inflow expected the reservoir for this specific month?

A retention reservoir is located so that all runoff from upstream catchment area passes through the reservoir. The catchment area (reservoir not included) is 9536/100 ha. The reservoir area is 1.0 ha. Infiltration through the bottom and sides of the reservoir is negligible. The discharge out from the reservoir is regulated at a constant Q = 0.045 cumec. Mean precipitation in July is 178 mm and mean inflow to the reservoir during the same month is 95000 m³. Mean evaporation from the lake surface in the month of July is 3.1 mm/day. a. What is the average July runoff coefficient? b. In July 1991, precipitation was slightly higher than normal, P = 9536/35 mm. what is the total inflow expected the reservoir for this specific month?

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

During a month, the average rate of inflow and outflow in a reservoir of surface area of 20 km2 is 10 m3/s and 15 m3/s respectively. The monthly rainfall and seepage loss is 10 cm and 1.8 cm respectively and the change in storage is 16 million m3. Determine the evaporation (in cm) for the month.
The reservoir in Tisa, Labangon is supplied from a watershed having an area of 24 sq.km. The surface area of the reservoir is only 6% of the watershed area. For the month of July the rainfall was 35 mm. Assuming a rainfall coefficient of 82% and the evaporation from a free water surface to be 28 mm during the month. Compute the loss in the watershed in cu.m.
A catchment has the Horton infiltration parameters: fo= 150 mm/h, fc = 50 mm/h, and k = 3 min¹. The design storm is given below. Estimate the time when ponding begins. Interval (min) Average rainfall (mm/hr) 20 40 80 170 90 20 0-10 10-20 20-30 30-40 40-50 50-60
If the Kuils River has a catchment area of 200 square kilometres and receives in a year 600 mm/year of rainfall, and the runoff from this catchment is 100 mm/year. Assuming that there is no loss to or gain of water from subsurface storage, the amount of evaporation isA) 400 mm/year, B) 500 mm/year, C) 300 mm/year D) 900 mm/year
Water flows in a horizontal, rectangular channel initially 10 feet wide and 2 feet deep. The initial velocity is 6 ft/s. This flow encounters downstream a simultaneous downward step and constriction. No energy losses are associated with these changes in channel configuration. a. What is the specific discharge, q: i. Upstream (for w= 10 feet)? ii. Downstream (for w = 6 feet)? b. What specific energy, E, is associated with the flow as initially specified (at the upstream location)? c. What is the minimum energy needed to pass the full discharge at the downstream location? d. What is the height (Az) of the smallest downward step necessary for the upstream flow conditions to remain as specified?
a. What is the inflow? b. What is the outflow?
A lake data is as follow: the discharge into lake is 1.5m /s the out flow discharge is 3. 1.25m /s, evaporation rate is 23.3 cm/month and the total precipitation was 29.4 cm/month. The average depth in the lake on 1 June was 19m, the average depth on June 30th was 20 m. The surface area of the lake approximately is a. 49 ha b. 59 ha .C 89ha d. 69 ha
The average surface area of a reservoir in the month of June is 20 km². In the same month, the average rate of inflow is 10 m³/s, outflow rate is 15 m³/s, monthly rainfall is 10 cm, monthly seepage loss is 1.8 cm and the storage change is 16 million m³. The evaporation (in cm) in that month is
There is a reservoir covering a 500-hectare area that has a constant draft of water pumped from it. The reservoir has a constant inflow from an upstream watershed, where the annual rainfall is 550 mm and the annual runoff is 312 mm. Over a 30-day period, the reservoir depth drops 9.5 m. During this time, there was precipitation over the reservoir of 87 mm and the total evaporation was 73 mm. What is the daily draft of water from the reservoir (in hectare-meters)?
Observe the question and find correct solution
A reservoir had a water surface elevation of 110 m above the datum at the beginning of the month. In the same month, the reservoir received an average inflow of 7.5 cms (m3/s) from surface runoff sources. For the same period, the outflow from the reservoir had an average value of 5 cms. Further, in the same month, the reservoir received a rainfall of 180 mm and losses due to evaporation of 5 cm. Assume the area of the lake is 50 km2 acres and assume no contribution from groundwater storage. What is the water surface elevation of the reservoir after the month?
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 106 m³. If k = 0.2 d-¹ and k, = 0.35 d-¹ at 20°C, determine the dissolved-oxygen concentration if the water temperature is 20°C, the inflow is anaerobic, and steady-state conditions exist.