5. Landfill Leachate Management A pre-RCRA landfill was lined with 6 ft of clay at the bottom. The cover of the landfill consists of 4 ft of clay. During a recent survey, it was found that the cover was at 60% of its maximum storage capacity. An unusual wet season experienced by the region raises concern about leachate production in the landfill. The weather data of last month (Feb) is as follows: Precipitation, P = 12.2 in Evapotranspiration, ET = 3.6 in Runoff coefficient of clay, R = 0.20 Field capacity, FC = 0.35 PWP = 0.20 a) Determine the amount of percolation through the cover in the month of Feb and the final storage capacity of the cover at the end of Feb. (Hint: PER = (P –R- ET) – ASLC) %3D b) Contingency plan requires the landfill engineer to estimate the breakthrough time should leachate is produced at the bottom of the landfill. Estimate the breakthrough time in years, assuming porosity of the clay, a, is 0.20. Hydraulic conductivity, K, is 1.5 x 1010 ft/s, and the highest hydraulic head is d?a 12 ft. (equation: t = K(d+h)'
5. Landfill Leachate Management A pre-RCRA landfill was lined with 6 ft of clay at the bottom. The cover of the landfill consists of 4 ft of clay. During a recent survey, it was found that the cover was at 60% of its maximum storage capacity. An unusual wet season experienced by the region raises concern about leachate production in the landfill. The weather data of last month (Feb) is as follows: Precipitation, P = 12.2 in Evapotranspiration, ET = 3.6 in Runoff coefficient of clay, R = 0.20 Field capacity, FC = 0.35 PWP = 0.20 a) Determine the amount of percolation through the cover in the month of Feb and the final storage capacity of the cover at the end of Feb. (Hint: PER = (P –R- ET) – ASLC) %3D b) Contingency plan requires the landfill engineer to estimate the breakthrough time should leachate is produced at the bottom of the landfill. Estimate the breakthrough time in years, assuming porosity of the clay, a, is 0.20. Hydraulic conductivity, K, is 1.5 x 1010 ft/s, and the highest hydraulic head is d?a 12 ft. (equation: t = K(d+h)'
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:5. Landfill Leachate Management
A pre-RCRA landfill was lined with 6 ft of clay at the bottom. The cover of the landfill consists of 4 ft of
clay. During a recent survey, it was found that the cover was at 60% of its maximum storage capacity. An
unusual wet season experienced by the region raises concern about leachate production in the landfill.
The weather data of last month (Feb) is as follows:
Precipitation, P = 12.2 in
%D
Evapotranspiration, ET = 3.6 in
Runoff coefficient of clay, R = 0.20
Field capacity, FC = 0.35
PWP = 0.20
a) Determine the amount of percolation through the cover in the month of Feb and the final storage
capacity of the cover at the end of Feb. (Hint: PER = (P – R - ET) – ASLC)
b) Contingency plan requires the landfill engineer to estimate the breakthrough time should leachate is
produced at the bottom of the landfill. Estimate the breakthrough time in years, assuming porosity
of the clay, a, is 0.20. Hydraulic conductivity, K, is 1.5 x 1010 ft/s, and the highest hydraulic head is
d?a
12 ft. (equation: t =
K(d+h)'
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning