Question

A certain lake has a surface area of 90km2 at the beginning of a certain month and the water depth was 92m for the whole surface area of the lake. During that month the reservoir receives an average inflow of 110 mm and 220m3 /s as rainfall and direct runoff respectively. Whereas the outflow from the reservoir was 210m3 /s as irrigation, 200mm as evapotranspiration and 300mm as groundwater recharge during that month. Find out the depth of the reservoir at the end of that month

Answer #1

A lake has a surface area of 2 km2. During the month
of June (30-day), the inflow rate (I) to the lake was 1.0
m3/s and outflow rate (Q) from the lake was 0.75
m3/s. During this period, the total amount of
precipitation (P) on the lake surface was 10 cm, the total amount
of evaporation (E) was measured at a nearby pan as 15 cm. (The pan
coefficient is 0.7)
Calculate the storage change (ΔS) for this period in...

A lake whose surface area could be approximated to be circular
with a diameter of 2750 m has a water surface elevation of 128.917m
at the beginning of the month of August.During that month the lake
received a streamflow of 172 mm from a catchment of 6225 ha. The
average precipitation during the month was 181 mm, and the average
rate of evaporation was to be 5mm/d. The monthly seepage was 30 mm.
The average outflow from the lake during...

For a given month (30 days): a 20 Km2 lake has 5 m3/s inflow, 4
m3/sec outflow, and total storage increases of 1.2X106 m3. Monthly
precipitation on the lake is 12 mm. Assuming the infiltration is
insignificant for the lake, determine the evaporation loss in (mm)
from the lake.
Part. 2 (2.5 marks): The evaporation rate from the surface of a 160
m2 lake is 436 m/day. Estimate the depth change in the lake in feet
during a 1-year period...

4. [20] Lake Kickapoo, TX, is approximately 12 km in length by
2.5 km in width. The inflow for the mouth of April is 3.26 m3 /s
and the outflow is 2.93 m3 /s. The total monthly precipitation is
15.2 cm and the evaporation is 10.2 cm. The net seepage out of the
lake is estimated to be 2.5 cm. Evapotranspiration and runoff can
be neglected. Estimate the change in storage during the month of
April.

In 2015 a reservoir had an average area of 11 mi2, average
inflow of 251.0 ft3/s, average outflow of 243.0 ft3/s, 800 mm of
precipitation, 943 mm of evaporation and the storage has increased
by 1562 acre-ft. How much water was lost to groundwater seepage
during the year assuming no other losses or gains? Report your
answer in mm

A detention basin with vertical walls has a surface area of 4047
m2 . Outflow from the basin is characterized by the storage-outflow
relationship provided below, wherein outflow is in m3 /s, storage
is in m3 , and Δt = 10 minutes. Suppose inflow into the basin is
characterized by a triangular hydrograph that increases linearly
from the origin to a peak of 10.2 m3 /s at 60 min, and then
decreases linearly back to zero at 150 min. Assuming...

Lake Waiua is Hawaii's only alpine lake. It has
(approximately) vertical sides and a 7000 m2
area.
Between 2010 and 2013, its depth declined from 3m to 0.3
m.
e) The soil of the lake bed has a porosity of
ϕ=0.5. After the lake drained, the soil is unsaturated
and has water content of θ=0.3, and a matric potential (head) of
-20m. There is a rainstorm. After 1 day, all the
rainfall infiltrates over the unsaturated soils. The cumulative
infiltration (F) depth is...

Part I. Indicate whether true or false (T or F).
____ Storm water detention ponds typically are designed to
regulate the outflow peak rate at or below a single target value,
such as the pre-development (pre-land use change) peak runoff rate
for a specified return period event. Detention storage alters the
peak but not the volume of the outflow hydrograph.
_____ Typical rating curves for weirs are concave upward.
Typical rating curves for orifices are concave downward.
____ A sediment...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 13 minutes ago

asked 17 minutes ago

asked 19 minutes ago

asked 26 minutes ago

asked 27 minutes ago

asked 38 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago