Wellsprings OF WATER FOR DEVELOPMEMT .


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Wellsprings OF WATER FOR DEVELOPMEMT. SURFACE WATERS SURFACE Spillover FROM Little WATERSHEDS STREAMS LAKES GROUND WATER WELLS SPRINGS DUGOUT Lakes. SURFACE WATER Advancement. Favorable circumstances of Surface Water Advancement Very vast amounts can be acquired
Transcripts
Slide 1

Wellsprings OF WATER FOR DEVELOPMEMT SURFACE WATERS SURFACE RUNOFF FROM SMALL WATERSHEDS STREAMS LAKES GROUND WATER WELLS SPRINGS DUGOUT PONDS

Slide 2

SURFACE WATER DEVELOPMENT Advantages of Surface Water Development Very vast amounts can be acquired Disadvantages of Surface Water Development More subject to dry season limitations Lower quality water

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GROUND WATER DEVELOPMENT Advantages of Ground Water Development More tried and true amid dry years Generally better water quality Disadvantages of Ground Water Development Limited accessible amount

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CROSS-SECTION OF AN AQUIFER Non-streaming artesian well Flowing Well artesian weight Ground Surface water table Unconfined Aquifer Artesian Aquifer

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CROSS-SECTION OF AN AQUIFER Perched Water Table Spring Ground Surface Regional Water Table

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DEFINITION OF GROUND WATER TERMS ARTESIAN WELL: A well which taps an artesian aquifer where water is under weight and will ascend in the well over the highest point of the aquifer. DRAWDOWN: The vertical distinction between the static or non-pumping water level in a well and the water level amid pumping.

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WATER WELLS GROUND SURFACE STATIC WATER TABLE

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WATER WELLS Q GROUND SURFACE STATIC WATER TABLE Pumping Water Level

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WATER WELLS Q GROUND SURFACE STATIC WATER TABLE Drawdown Curve

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Pumping Water Level

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DEFINITION OF GROUND WATER TERMS SPECIFIC CAPACITY: The pumping rate partitioned by the drawdown in the well. (case GPM/FT). A decent approach to look at wells. A high particular limit requires less energy to get a similar measure of water from a well, or will get more water for a similar measure of pumping force provided

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Artesian Wells Take water from an aquifer that is under weight Are not continually streaming wells Have a huge sweep of impact Have low particular limit

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Power Required to Move Water Q = Gallons/Minute g = Water Density = 8.34 lb./Gallon H = potential as head in feet Horsepower = 33000 Ft-lb/Minute 33000/8.34 = 3957 Water Power = Q g H Ft-lb/Minute Eq. 10.4

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EXAMPLE: Static water level in well is 15 feet beneath the ground surface Well pumped at a rate of 100 GPM for 12 hours. Water level in well at end of 12 hours is 30 feet Drawdown = 30 - 15 = 15 feet Specific Capacity = 100/15 = 6.67 GPM/ft

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EXAMPLE: In contrasting two wells we locate that one has a Specific Capacity of 10 GPM/foot of drawdown and alternate has a particular limit of 20 GPM/ft. What amount more power will it take to pump 500 Gallons Per Minute from the main well than from the second well?

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EXAMPLE: The drawdown in the principal well will be 500 GPM/10 GPM/foot = 50 feet. The drawdown in the second well will be 500 GPM/20 GPM/foot = 25 feet The distinction in drawdown will be 50 - 25 = 25 feet

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EXAMPLE: From Equation 10.4 on page 181 in the course message, the distinction in water power will be:

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Water Pumping Power Problem Pumping Rate = 200 GPM Static Water Level = 20 feet Pumping Water Level = 40 feet Pump Efficiency = 70% Determine the power required for this well.

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WATER LAW RIPARIAN DOCTRINE: Every riparian proprietor has approach ideal to water utilize. Just workable when the water source is not restricting. The reason for water law in the eastern US and in muggy parts of the world.

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WATER LAW DOCTRINE OF PRIOR APPROPRIATION: Use of water depends on noteworthy utilize. Water rights can be purchased and sold quite recently like land titles. Utilized where water source is constrained. The reason for water law in the western US and in dry parts of the world.

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IOWA WATER LAW Non-directed utilizations: Domestic family unit and domesticated animals Any helpful utilize under 5000 gallons for each day Any useful utilization of Iowa outskirt waters. Any current advantageous use inside districts as of May 15, 1957.

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IOWA WATER LAW Regulated utilizations (allow required) Any utilization of more than 5000 gallons for each day Any release of surface water underground. Any expansion of city or mechanical utilization of over 3% over per-law day by day top utilize rate.

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IOWA WATER LAW Regulated utilizations (allow required) Any water stockpiling of 18 section of land feet or more. Development of a dam with 5000 sections of land waste range or more. Development of any surge plain infringement on any stream with 10 square miles of seepage zone or more.

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