An unconfined aquifer has experienced an average water level drop of 11-ft over the past year. If the area of the aquifer is 30,000 ft², the transmissivity is 100(10)-5 ft² and the specific yield is 0.25, what volume S of water (in ft³) has actually been lost or gained (specify) from storage over the year period?

An unconfined aquifer has experienced an average water level drop of 11-ft over the past year. If the area of the aquifer is 30,000 ft², the transmissivity is 100(10)-5 ft² and the specific yield is 0.25, what volume S of water (in ft³) has actually been lost or gained (specify) from storage over the year period?

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

Civil Engineering The Goshute Valley in Nevada has some basin fill unconfined aquifers that are pumped for farm and agriculture water use, but receive little replenishment (recharge). In an area of 47,000 hectares, the groundwater pumping is about 11 million m3/year, and the Specific yield is 0.08. Calculate the drop in the water table? 1 hectare = 10,000m2
A volume of 3.0 x 100 m³ of groundwater was pumped out from an unconfined aquifer uniformly from an area of 5 km². The pumping lowered the water table from initial level of 102 m to 99 m. The specific yield of the aquifer is
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.
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.
How much water must be removed from an unconfined aquifer to lower the water table 2 feet. In your research, you located a past study which determined the aquifer has a specific yield of 0.22. Assume the water is incompressible and the porosity does not change.
In hydrological terms what are recharge and residence time and What happens if pumping rate from aquifers exceeds recharge rate?
A well pumps at a steady rate of 600m3/day in a confined aquifer. It is installed with a gravel pack in a hole that is 30 cm in diameter. The head in the pumping well is 427.9 m. The head in an observation well located 8 m away is 430.2 m. Calculate the transmissivity of the aquifer, assuming steady, radial flow.
A well 12‐in in diameter penetrates 108 ft below the static water table. After a longperiod of pumping at a rate of 350 gpm, the drawdowns in wells 57 ft and 148 ft from thepumped well were found to be 12 ft and 7.4 ft, respectively.(a) What is the transmissivity of the aquifer?(b) What is the approximate drawdown in the pumped well?
How much subsidence would you expect from an elastic confined aquifer that hasa specific storage of 2.6 x 10-5 m-1, a decline in pressure of 225 kPa, an aquifer thickness of180 m, and a porosity of 24 percent? Assume the aquifer temperature is 20 °C. Just looking for a push in the right direction. Thanks
An artesian well with a radius of 0.75 meters was constructed to pump water from a source with a confining unit height of 30 meters. Two observation wells are 200 meters and 1,500 meters away from the test well with corresponding drawdowns of 9 meters and 3 meters at a steady state. Water is pumped at a rate of 432,000 L/day. a) The aquifer type for this problem is: b) The drawdown in the test well c) What is the value for the hydraulic conductivity d) The soil classification for the confining unit can be e) The transmissivity
A confined aquifer has a thickness of 105m and an area of 11x10 9 m 2 . Over a period of 35 years,the aquifers supplies 100 x 10 6 m 3 of water. This quantity is drawn entirely from storage and thepotentiometric level drops by an average of 2 m per year. The specific storage due exclusively tothe expansion or contraction of the water has been determined to be 8 x 10 -7 m -1 . Whatpercentage of the pumped water is supplied by compression of the aquifer skeleton?
A confined aquifer is 18.5 m thick. The hydraulic head drops 2.99 m between two wellsthat are 823 m apart. If the hydraulic conductivity of the aquifer is 4.35 m/d, how many cubicmeters of water are moving through the aquifer per unit width?