Questions tagged [water-resources]

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20 views

Borewell motor water outlet adjustment

Recently we put 500 feet borewell in our area, it's hot summer season now. Person who drilled the borewell told me that we can get 1.5 inch of water now. During winter season we can expect at least 2 ...
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22 views

How to build multiple large scale fish tanks with water at different temperatures

I am wondering at a high level what are the material components that might be used in building several large scale fish tanks that are temperature regulated like on a fishing farm. For example, what ...
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1answer
36 views

Magnetic treatment of hard water to prevent scale and corrosion? How does this work?

I ran across this company at their booth at a Tradeshow (2018). They claim to have a chemical free (and as far as I can tell - a power free) treatment method for hard water to minimize scale and ...
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1answer
38 views

Is thermodynamic data of fresh water a good approximation for saline water?

I am currently working on desalination project for my final year. The design is based on flashing of hot liquid in low pressure vessel and then condensing the extracted the steam to produce pure water....
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1answer
28 views

What happens to the sedimentation collected in water treatment plants?

The Washington DC water treatment plant appears to use sedimentation tanks for both treating water before consumption and for treating sewage that is then discharged. My question: What happens to the ...
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2answers
34 views

Water loop with a drop output?

Hello everyone this project is for my aquarium. I have a big bucket beside it on the floor and I was planning on using it for the water changes. Will be a neocaridina shrimp breeding aquarium so my ...
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0answers
20 views

Drinking Water Treatment R&D: Mechanical or Civil Engineering Degree? [closed]

I will be a freshman in University next year. After graduating, I would like to get a job in the R&D sector of drinking water treatment technologies. I'm unsure if I should get a degree in ME or ...
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1answer
29 views

Dew point and rainning

Hi so I recently learned about dew point and rainning. From my understanding, dew point is the temperature at which the air can hold the amount of moisture present. And when the temperature decrease, ...
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0answers
35 views

2 mm accuracy in an affordable water level sensor (pressure transducer) - Does one exist? [closed]

I'm looking to conduct water level monitoring in streams and rivers for water resource engineering purposes. My plan is to use Arduinos and Raspberry Pis in conjunction with a pressure transducer, as ...
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3answers
63 views

Will multiple lines off same water main have equal pressure?

I’m in a situation where a multi unit structure under construction will receive its water from local municipality via three metered 5/8” lines. We’d like to combine all of the lines into a 3” ...
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0answers
23 views

Alternative to HDPE Piping for long range sea-water + water transport [closed]

Is there an alternative for the expensive HDPE Piping for long range sea water transport?
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3answers
164 views

Is there a way to reduce leaks and infrastructure damage when turning water on and off at the scale of city?

Cape Town, South Africa is experiencing an extremely serious drought, with estimates putting April 21, 2018 as the day that the city will be forced to shut off all municipal water supplies and begin ...
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1answer
199 views

Can my total dynamic head (TDH) be more than the “Rated Head” on the pump?

I have just received a recommendation to use a pump with a "Rated Flow" of 1cu.m/h and a "Rated Head" of 91m. I am realizing I am actually not familiar with these two terms (Rated Flow and Head). My ...
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2answers
41 views

Tires on ice underwater (AUV Design)

So I'm designing an AUV which will have wheels filled with air/helium(*) to ascent to the Antarctica ice shelves from underwater. My goal is retrieve data, images and information about the underwater ...
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1answer
30 views

Why do pumped storage hydroelectric facilities use bent pipes? [closed]

When a reservoir is used to store water for electricity, it's pipes are usually laid in several segments on the ground to reach its source, such as a lake. It seems that if the pipes went directly to ...
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1answer
50 views

Managing water supply pressure to a building

I am planning to supply drinking water only (not bath or sanitation or washing) from a tank on a 10-storey building. The problem is that if a gravity feed is used, then the pressure will be ...
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1answer
126 views

Water supply system

I have one floor mall with 10 shops (4 meter height), I should supply water from the main drain (3 inch) connected with pressure reducer (1 1/2 inch). I don't have the flow rate of at the 1 1/2 inch, ...
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1answer
28 views

Is it possible to create a sub-surface pond?

Has anyone designed a pond that extends beyond its surface perimeter? Example cross section: brown - existing surface (or brought to grade) black - designed pond blue - capacity
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0answers
59 views

How do I build a water Ram Pump that will pump 400 feet and 30 feet vertically

I'm interested in building a ram pump to pump water from a creek that runs at the bottom of my property to the top where i'm going to make my little homestead. I've seen allot of stuff online on ...
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2answers
56 views

Are ponds always dug?

When creating a detention pond I have only came across examples where the pond is created by digging. Is it possible that a pond is created by creating retaining walls / embankments? and if it is can ...
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1answer
28 views

Chart that describes how full the pond is

when designing a pond it is customary to produce a chart for the local council, specifying the height of the water for the volume stored. What is the name of this chart?
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0answers
22 views

Determing the optimal dimensions for hydrocyclone water/sediment separation

OK, let's be clear: I'm a software engineer (retired), not a physicist, hydrologist, or hydraulics person, so please be gentle. Back Story: In the process of developing an open source system for ...
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0answers
159 views

Fluid Statics Problem

I have been attempting this question for a while now. Could anyone give me a hand? The question and the work I have done so far is below. My final "answer" is P (force required to keep the gate ...
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2answers
164 views

How does water sink works?

How does water sink works? I tried to do the same thing but the water just stayed:
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1answer
87 views

Is there a way to make water rise from 1'st to 2'nd floor?

I want to have water source on the 2'nd floor of our house so I can wash stuff there without going down to our 1'st floor... Is there a way to make water rise from 1'st to 2'nd floor?
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1answer
2k views

Difference between static water level and water table level

Can anyone please explain to me the difference in the levels of static water and water table?
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1answer
49 views

How many batteries can I charge and how long would it take?

Using a hydro generator which gives an output of 4.838KW, I am trying to figure out how many batteries I can charge and how long it would take. I am doing the calculations based on 12V, 17Ah ...
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2answers
1k views

How to calculate hydropower in kW without water head

I am trying to do some calculations to figure out how much power output would be produced from a water powered generator that uses horizontal current flow to move the generators coils rather than ...
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2answers
905 views

Open Channel Flow with no slope

I'm struggling to confirm the Velocity in an open channel flow with 0 percent slope. Water enters the channel from an open pipe. The rectangular channel dimensions (66' Long x 3.33' W x 6.75' D) and ...
2
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1answer
92 views

What happens if one pumps from municipal water supply during power outage?

During the 2003 Northeast blackout I had the misfortune of being in Manhattan. After about 12 hours municipal water pressure was gone – I assume because the pressure is supplied from water ...
2
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1answer
120 views

Channel or Canal?

This is about navigable or irrigation water ways. Examples: Navigable channel or navigable canal? (it is about approach water ways to sea ports, or artificial inland water ways). Channel dredging or ...
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2answers
969 views

Can a retention/detention pond and a parking-lot be constructed in the same site foot-print?

Retention/Detention Ponds are often added to a site-design to mitigate storm-water runoff. Enhanced Porosity Concrete (EPC), aka Pervious Concrete, can be used as a parking-lot pavement that allows ...
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2answers
9k views

Rule of thumb maximum flow velocity of water in pipes

I have come across various values for maximum flow velocity of water in pipes. At university we were told that 2 m/s is the upper limit where flow becomes turbulent. In various planning reports I ...
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0answers
43 views

Efficiency of water distillation vs active Condensation Trap [closed]

I was wondering what would be more efficient means of producing clean water. The first method could be though a distillation process where by you boil contaminated water and collect the water vapor (...
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0answers
316 views

Is there a method to determine the runoff for arid areas in developing countries?

Note: this question was totally rephrased and expanded on, addressing the comments and questions posed to the first version. The de-facto standard source for runoff calculations in South Africa is ...
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2answers
174 views

Best way to get rid of turbulent flows?

I am making a testing facility for pumps. This facility has to be able to handle 500 m3/h with at little turbulence as possible. The basin itself is 5 meters long, 2,5 meters wide and 2 meters tall. ...
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1answer
271 views

Monitoring water flow from a pump

I want to monitor how much water we're pumping out of our shallow well every day (residential). We want to figure out how many gallons per day we're using. Doesn't have to be crazy accurate. First ...
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2answers
740 views

Why are creeks sometimes piped underground in urban areas?

I live in Melbourne, Australia and a lot of the creeks here have been diverted through underground storm water pipes. I guessed that this is because land is highly sought after for development, and a ...
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2answers
1k views

Can I seal the inside of a water well to use it as water reservoir when the well is dry?

We've had unusually dry weather and our well has run so low that we had to call in a water hauling company to refill it a few days ago. The water man told me that even though he dumped in ~ 1000 ...
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2answers
3k views

How do I calculate the density of seawater at different temperatures?

I need to know the difference in seawater density at 28 and 98 degrees Fahrenheit for control system synthesis. How can I calculate the density for a given temperature?
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0answers
128 views

What are the best materials to use for producing drinking water from the Air?

There are several companies producing equipment that produce drinking water from the air. They use dessicants, hygroscopic brine, or deliquescent salts, to adsorb water from atmospheric humidity. ...
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4answers
1k views

Low cost, moderately accurate water depth measurement

tl;dr: After an extended conversation with an old-timer, I realized a few things: The single most valuable measurement for the majority of people will be water-depth-in-well. The second most valuable ...
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5answers
6k views

Why don't hydroelectric plants use cascades of turbines instead of single turbines?

In a gas turbine engine there're multiple sets of blades - one set after another and combustion products pass all the sets and each set of blades gets some of the power. This increases utilization of ...
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3answers
168 views

What development possibilities could yet exist in water desalination?

I am thinking mainly in $\frac{kWh}{m^3}$ and $\frac{\$}{m^3}$. In the past some decades a wide range of surprisingly efficient water desalination plants were built, mainly in desert regions (Middle ...
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0answers
275 views

Determining RTK parameters for runoff analysis

I am examining a watershed and determining runoff using the RTK method. I basically use a 'guess and check the hydrograph' method right now. I've seen calibrators that use a mutation and convergence ...