Water Supply Engineering

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  • Topic: Water purification, Coliform bacteria, Water pollution
  • Pages : 10 (514 words )
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  • Published : April 22, 2013
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Water Quality/Examination/Analysis/Characterization: Qualitative/Quantitative

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Why analysis of water ?
Raw water quality ? Need of purification ? Response to purification ? Changes during distribution ? Depending on wanted information–fix test/group of tests

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Examination of water: Tests measuring/reflecting/related to-

1. Safety and wholesomeness e.g. contamination (MPN), toxics (As), beneficial amounts (F), pollutants (N, Cl, P), laxative properties (Mg, SO4) 2. Palatability/aesthetic acceptability e.g. temp.,turbidity, colour, taste, odour 3. Economic usefulness e.g. soap consumption 4. Water treatment processes e.g. coagulation, chlorination etc. 5. Functional tests e.g. optimum alum dose of 89 10

WHO, USEPA, EU, AWWA

Physical Chemical Biological
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5 µm .03 µm 10 µm

Micro Ultra Nano RO

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Typhoid fever cases per 100000 89 population from 1890-1935, Philadelphia. of 21

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TDS

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-Longer the useful life -Greater the difficulty of extensions -Smaller the rate of growth -Lower the rate of interest, and -Better the early performance Farther into the future, designs can be projected

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FACTORS AFFECTING RATE OF WATER DEMAND:

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VARIATIONS IN RATE OF DEMAND:

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EFFECTS OF VARIATIONS IN DEMAND ON DESIGN CAPACITIES OF DIFFERENT COMPONENTS

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SOURCES OF WATER SUPPLY

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Conventional Treatment Plant

Intake well

Gokul Barrage

Courtesy: Google Maps
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WELLS

By Digging, Driving, Drilling and Boring to access of 89 groundwater in aquifer material

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Dug Wells at Haridwar

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INFILTRATION WELLS: OPEN BOTTOM / OPENING IN CAISSION WALL
(AT HARIDWAR AND RISHIKESH) [Conceptually similar also at Badshashi Bagh, Dhikala and Ramsawala)]

(From M.Tech Thesis of Mall)

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of 89 Location: Production wells, Haridwar

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Water Quality Comparision: River/ Canal Water vs. Production Well Parameter River and canals
Nonmonsoon Turbidity (NTU) Conductivity (µS/cm at 25 OC) Total coliform (MPN/ 100 mL) Fecal coliform (MPN/ 100 mL) 1.0–3.1 (1.4) 218–262 (251) 4300 –9300 (6420) 2100–6400 (3030) Monsoon 100–200 (149) 140–184 (155) 23000–93000 (51670) 1500–43000 (22500)

Production well
Nonmonsoon 0.2–0.4 (0.3) 415–466 (440)
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