SOLUTION MANUAL FOR
WATER AND WASTEWATER
ENGINEERING 3RD EDITION
BY SHAMMAS
, SOLUTION MANUAL
for
WATER AND WASTEWATER ENGINEERING
Water Supply and Wastewater Removal
By
Nazih K. Shammas and Lawrence K. Wang
, Chapter 1
Introduction to Water Systems
Problem 1.1
What is the stream flow in MGD for a catchment area of 80 mile 2 where rainfall rate is 45 in. per year and
evaporation rate is 20 in. per year?
Solution:
Runoff rate (R)
= rainfall rate – evaporation rate
= (45 – 20) in/year
= 25 in/year
Conversion factors:
1 in/year = 1 in.-mile2/(year-mile2)
= 47,600 gpd/mile2
= 0.0476 MGD/mile2
= 17.378 MG/year/mile2
Stream flow with a runoff rate of 25 in/year
= (25) (17.378 MG/year/mile2) (80 mile2)
= 34800 MG/year
= 95.3 MGD Stream flow
Evaluation:
R = Q/A
WATER AND WASTEWATER
ENGINEERING 3RD EDITION
BY SHAMMAS
, SOLUTION MANUAL
for
WATER AND WASTEWATER ENGINEERING
Water Supply and Wastewater Removal
By
Nazih K. Shammas and Lawrence K. Wang
, Chapter 1
Introduction to Water Systems
Problem 1.1
What is the stream flow in MGD for a catchment area of 80 mile 2 where rainfall rate is 45 in. per year and
evaporation rate is 20 in. per year?
Solution:
Runoff rate (R)
= rainfall rate – evaporation rate
= (45 – 20) in/year
= 25 in/year
Conversion factors:
1 in/year = 1 in.-mile2/(year-mile2)
= 47,600 gpd/mile2
= 0.0476 MGD/mile2
= 17.378 MG/year/mile2
Stream flow with a runoff rate of 25 in/year
= (25) (17.378 MG/year/mile2) (80 mile2)
= 34800 MG/year
= 95.3 MGD Stream flow
Evaluation:
R = Q/A
