Questions related to Water Engineering
I am currently pursuing may M.E. in Land and Water Engineering. Very soon my last semester is going to start and am planning to estimate/forecast rice yield using DSSAT also sensitivity analysis. What suggestions you want to give me?
What are the new technologies for desalination and purification of seawater without the consumption of electricity that can already be applied in areas with freshwater scarcity?
But the scarcity of drinking water occurring in an increasing number of countries in Europe and also on other continents is caused not only by the progressive process of global warming, but also by unsustainable agriculture carried out in ignorance of the planet's climate and biosphere. But the scarcity of drinking water occurring in an increasing number of countries in Europe and also on other continents is caused not only by the progressive process of global warming, but also by unsustainable agriculture carried out in ignorance of the planet's climate and biosphere. The over-intensive, production-intensive cultivation of agricultural crops, mainly for the production of fodder for livestock rather than food for humans, and the production of exotic fruit sold mainly in supermarkets and hypermarkets in other countries, is also a significant factor in the excessive consumption of surface water and rainwater and the decline in drinking water levels over ever larger areas.
In view of the above, I address the following question to the esteemed community of scientists and researchers:
What are the new technologies for desalination and purification of seawater without the consumption of electricity that can already be applied in areas characterised by freshwater scarcity?
What do you think about this topic?
What is your opinion on this subject?
I invite you all to discuss,
Thank you very much,
I would like to ask about the vertical displacement As illustrated in the figure the monopile gave edge displacement from the top part of the monopile (0m) to the tail of the monopile (40m). However, I'd like to ask about the theory related to this phenomenon for clay and sand.
Logically and in reality the displacement should be from the top till the end of the monopile especially when it applied vertical load.
Hope there is any theory or discussion related to this case
I'm a student and I'm in "Civil and Environmental Engineering" department.
please, can you tell me what are software programs that I will need when I graduate in (water desalination, irrigation systems, water distribution systems)?
I would be grateful if you could help me find out one or few case studies in the Pacific region where soil erosion in pineapple fields is efficiently managed. As part of a regional project (www.spc.int/resccue) dedicated to integrated coastal zone management in the Pacific region, I would like to identify few case studies where soil erosion in pineapple fields is correctly managed in order to organize a technical exchange between pineapple producers in French Polynesia and producers in other places of the Pacific region.
Many thanks for your answer.
Do not hesitate to contact me if you need further information.
Mr CHARLES mahe / RESCCUE project coordinator in French Polynesia
In the computer modeling and simulation of floatovoltaic systems in marine environments or freshwater reservoirs, a floating PV photovoltaic array performance model and simulation must characterize the hydrologic impact of floating PV. The same time-series evaporation modelling challenge exists for modeling agrivoltaic PV energy systems. A key aspect is predicting the FSPV or FPV irrigation reservoir water evaporation benefits in the sustainability assessment for sustainable development energy projects. Quantifying evaporative water-saving as a hydrologic impact feature is a crucial project viability metric in a techno-economic model for FPV hydropower hybrid performance models for hydroelectric facilities, or to estimate floating PV array operating temperature or floating PV module internal cell temperature changes in comparative studies for floating FPV and ground-mounted PV or GPV.
Computer estimation of evaporation time-series from a water surface of a water basin or wastewater basin is often calculated in Matlab or Python through mathematical evaporation models, by using parameters such as solar radiation, air temperature, humidity, water temperature, wind velocity, etc. While various applications and modifications of the Penman method, Penman-Monteith equations or Priestley-Taylor evaporation rates are used to predict or determine evapotranspiration rates in various solar water pond cover configurations, and PV floater design types as a sustainability indicator.
However, most water surface modeling or reservoir evaporation methodologies seem to be based on average daily solar irradiation rates, meaning real-time simulation model predictions need to be adapted to account for more instantaneous hour-to-hour solar irradiation data model inputs, ambient temperature variations, wind variations, airmass, relative humidity, water temperature or weather prediction data obtained from remote sensing and weather prediction data.
In a recent publication (link below) on the environmental impact assessment of floating solar PV, we propose a method to time-normalize the hourly predictions of floating solar PV evaporation rates in a water-energy-land-food nexus metric. I would like to know from researchers and scientists if literature is available to discuss other scientific data engineering options for hour-to-hour or even-minute-to-minute evaporation rate estimations on open water surfaces as a means to quantify the evaporation savings of an FPV prototype in a real-time simulation model:
The policy planners are emphasizing to increase the water use efficiency. However, I understand a minimum leaching fraction is essential even for canal water irrigation under arid climates. Arid regions are already facing shortage of good quality water, to meet this shortage poor quality irrigation waters are in use everywhere. I fear, unless magnitude of LR is not considered and met, there must be problems of soil salinity followed by sodicity that is even more difficult to reclaim and manage for crop production for food security.
Please suggest a high graphical resolution software for Water Quality Modeling of Water Supply Pipe Networks which includes the ability to analyze chemical decay. Thank you.
Dear researchers and experts
My first paper about numerical validation of spur dikes (1-2) in Drinking Water and Engineering Science journal (3) didn't accept cause they don't have reviewer in the field and after a long time, they said that it's not in their scope. Although, sadly, they published it due to their law and put a "This preprint has been retracted." with a red mark! on it. since this paper didn't accept, if available, we want to improve and publish it in a journal or a valid conference.
as our facility doesn't support us in international conferences could anyone sponsored us? and could anyone help us to improve the paper for publishing?
If anyone likes to contribute, Please contact me for further discussion and queries, I would be appreciated.
2-Pourshahbaz, H., Abbasi, S. and Taghvaei, P., Numerical scour modeling around parallel spur dikes in FLOW-3D.
Due to environmental impacts of dams such as:
- problems for the surrounding area, for plant life,
- dams block up flowing bodies of water, such as rivers, any animals that depend on the flow to reproduce or as part of their life cycle are put in danger.
- Harm water quality and temperature.
- Block fish migration
Ex: Think total hardness is 200ppm. Total treated water requirement is 5000L/day.
Then how calculated the
a) Softener vessel size?
b) Required resin volume?
c) Salt regeneration time?
d) Dosage of salt?
I am going to perform a membrane autopsy of a reverse osmosis membrane to investigate fouling. I know how to do it based on research papers that i have read but I need a standard procedure describing the steps to be followed.
Water disapearance from drinkers in piggery can be partitioned into the water consumed by the pigs and water spillage. The percentage of water spillage is usually too high to be ingored particularly if using nipple drinker, so the water disapearance cannot be simply recorded as the water consumption. Is there any method or technology can seperately quantify the water intake and spillage in individually housed pigs (eg: one pig with one nipple drinker)? Thanks.
To determine the mean river Width in sections, there are different methods. As you know, rivers shape isn't an unique shape and I can't calculate it by mathematical methods that usually we used in numeral shapes. I can calculate the area that covered by channel (A) and the length of flow (L) in study section, can I use this typical equation "A/L=w"?
I need a supervised fuzzy regression sourse code for MATLAB to forecast the groundwater level. Can anybody tell me how and where can I get a sample source code for fuzzy regression?
How to calculate the cross sectional area required of Forward Osmosis membrane for treating any wastewater?
I want details of sustainable technologies used in sea water treatment and how to use them in a wastewater treatment plant of a hotel
Looking for any recent research or innovations on the water treatment. Work with poor communities in rural Africa and most current treatment systems are very expensive for the community. Would there be any appropriate technology solutions? Recently drilled two boreholes near Lake Turkana with good yield but water is too salty for drinking and farming as well. Also ideas of how to use this water would be welcomed.
If I am doing disinfection of water with chlorine and the initial concentration of free chlorine is 3 mg/L before spiking the water with bacteria. The initial demand of free chlorine immediately after adding bacteria is 2.8 mg/L. The reaction occurs for 1 minute, measure again free chlorine after the contact time (2.6 mg/L) and then I stop the reaction with Sodium thiosulfate. The CT value would be the mean value (3+2.8+2.5)/3= 2.76 mg/L * 1min? Or just considering the initial demand? (3+2.8/2=2.9 min mg/L) thanks in advance!!
I want to work for the leakage assessment of intermittent water distribution system. Epanet is mainly used for pressurized water supply system. But in my country the DMA's are not implemented. So when I will start to assess leakage, what kind of tools I should use for intermittent water supply system. I will be grateful, if kindly the researchers help me.
I require an sensor which will detect the presence and absence of water through analog signal. I will be installed it inside pipe and it should be small and not too costly.
As per a WHO report, by the end of 2012, 64% of the global population used improved sanitation facilities which means almost 1 of every 3 person still have less / no access to proper sanitation. What steps should be taken to make it a near 100% of the same?
I work on the MIP to detect the testosterone in water. Colloidal crystals of silica particles were fabricated on the glass slide. Then, I used acrylic acid as a monomer, EGDMA as a cross linker and AIBN as an initiator. My problem is when I made the incubation to detect the hormone, the concentration of testosterone before and after the incubation is the same ( I used 30 mg of MIP in 15 ml of different concentration solution of hormone). This mean there is no detection, or my MIPs not work. Also, I got the same results for NIP.
1- I used the hydrofluoric acid (HF) for removal of silica particles after polymerization and acetic acid for removal of testosterone from the MIP.
2- Also, my MIPs is a thin film, not particles
Does anyone have the same problem when worked on the MIP or anyone can advise me, please?
I would like to discuss with anyone who has studied and surveyed water mills and their interactions with the river beds, or I would have some suggestions of publications to read or download from the network. It would also be nice to be able to exchange research experiences gained in the different countries of origin. Thank you.
I got results from pressure plate on the relation between the water content and pressure head. I want to use RETC to obtain soil hydraulic properties. Can anyone help me in this issue? I need a quick guide to get these properties.
Has the angle of deviation of water bars effect on their efficiency?
I needs some references about efficiency of water bars on skid trails in forest area.
Is it possible that any Water Treatment Plant Operator or Scientist can share some historical data (a few years)?
- Specially daily data of: raw water quality parameters, treated water quality parameters, Alumine dose, Chlorine dose, Ozone dose,....) from any Water Treatment Plant in USA, Western Europe, or another region.
- Water treatment plant those using specially using Ozonation in pretreatment, PAC, and GAC in water treatment process.
Thanks in advance for all your contributions.
I need some references about the effect of protection layer that is added on the surface of sand filter (especially on slow sand filter).
I'm doing a water quality research. I have parameters like nitrogen DO etc. While having those date as x-axis and Concentrations as Y-axis, when i log-transformed the concentrations, the graph pattern appeared to be the same as previous one. Why is this happening? What is the other way to make my graph linear instead of using log-graph?
dear all, i am a chemical engineer working in International petrochemical (pvt) limited. We have a sodium sulfate plant and we have 3 evaporators at site. About 1.3 tons of water is being evaporated per hour. And the heated vapors are being wasted in air. I want to recover those vapors some how. For that i am considering 2 Options right now.
1- Mechanical Vapors re-compressor.
2- Thermal Vapors Re-compressor.
The pressure of steam available is about 75 psi. Kindly tell me the Right proposal for the right action in terms of cost and optimization.
Do you know any dredger manufacturing company in the Netherlands or EU countries? Or can you give me any contact of such a company? Please find me a dredger manufacturing company from the Netherlands or other EU countries to work with my husband's company to participate a Tender. The company has to have 20 years dredger manufacturing experience. We will form joint Venture (JV) and all works will be done in Bangladesh in our shipyard. All technical and Machinery supports for 20” and 18” Cutter Suction Dredger will be provided by the dredger manufacturing Company.
how can I get aware of the newest researches about river water quality and uncertainties about it?
please help me by answering
I am working on a practical project with waste activated sludge under thermal hydrolysis process. After the thermal incubation and centrifugation of sludge sample, the sludge sample is separated in three phase: sludge, supernatant and a yellow intermediate. This intermediate is found at 120 degree and disappear at 140 degree. I assume this is a kind of EPS after huge amount of literature review. But i still not completely sure, there does not any literatures found same situation with thermal condition.
suggest me some commercially adapted technologies to treat effluents produced from onion, garlic and other vegetable dehydration plants.
My waste water contains higher concentration of ammonium ion, magnesium ion, phosphate ion and nitrate ion.The pH of my sample range from 7 to 11 and i use 1M NaOH to control pH. I want to detect Mg²⁺ + NH₄⁺+ PO₄³¯ by using metrohm 83 ion chromatography. I diluted my sample 10000 times but could not get good result. can anyone tell what is the problem and how can i solve it? Thanks in advance.
we have three cases
-the spillway upstream dam axis
-the spillway downstream dam axis
-spillway with the dam axis
I am just planning for my master thesis. my Idea is to do research on urban flood modeling of Kabul City.
I have DEM with resolution of 1 meter and rainfall data with 1 day resolution,
Kabul has no underground sewer system. water drains in the open, concrete lined ditches alongside the roads. i also have the data about land use.
Kindly give me suggestions which model i should use for urban flood simulation in this case.
thanks for your attention
For low head (1-5 m) and various discharge (2-50 cms ) rivers, a conventional small hydroelectrical power plant does not seem feasable. I am considering water wheels and looking for theoretical and practical guide. Thanks in advance.
PVDF membrane used in a simple NaNO3 solution, and we detected a release of fluoride from the membrane. We can't explain the mechanism for how the fluoride can be broken off from the PVDF matrix.
I have some problem measuring ORP-value in reverse osmosis permeate. The ORP value in the this RO permeate in all case was determined in the range 200-300 mV which is quite high. The calibration was OK. I've also used the same probe and instrument for surface water and boiler condensate, the values were 190 mV and 100 mV, respectively, which are correct values. The conductivity of the RO permeate is 10-14 uS/cm and 200-300 uS/cm for the surface water and 8-12 uS/cm for the boiler conensate. I do not understand why is this high values of the RO permeate because even sodium-metabisulfit is added to remove all the chorine constituent from the RO feed and no actiive chlorine was determined in the RO feed. It is related the low dissolved solid content? What is the reliability of the probe and the instrument in such a low dissolved solid concentation. Or this is because of the dissolved oxigen? Please give me some suggestions.
I have a river water that may have a potential to form fluorapatite, is there a possibility for scaling on UF dead-end membrane?
for information, the UF membrane cut-off is 10 kDa.
How does the physical,chemical and biological characteristics of aquatic plants in a constructed wetlands affect their performance in wastewater treatment in constructed wetlands?
How can I avoid negative pressure in a closed tank where a tube brings water and another tube discharges it for gravity? Input and output are at same level and I get bubbles in output together with liquid. Is there any way I could keep the water level higher than output point so that it is constantly submerged? I cannot increase the influent flow.
Many thanks for your help,
Actually I am going to research on drought monitoring in Bangladesh and I want to use MODIS tool. But I do not have an idea how to use that. Can anyone help me and show me some guidelines? Thanks in advance.
I am currently doing a case study on pump efficiency and looking at the thermodynamic method which uses differential temperature and pressure to measure losses. I am searching for literature on this subject to form an academic report backed up with results from the pump tests to identify if the thermodynamic method should be used.
Using saline water in agriculture has been investigated by various researchers. But can we use saline water in industry? Can you suggest me some references on my relevant topic?
Industrial machines, pipes and containers is typically work at temperatures above 100 oC. The salts may be deposited in these places and disrupt manufacturing. Also saline water may be unhelpful to produce and the ideal product not be made.
Whats the simple method to estimate T90 for the sewage river, dumping effluent to sea through estuary. Whats Methodology should be adopted?
We are a group of academics working on how we can improve water supply and sanitation in the city of Masvingo, Zimbabwe
Can anyone guide me through numerical dam-break modelling with finite difference methods?
I know that in finite volume methods, boundary conditions must agree with zero velocity at upstream, but since I can't find a head-velocity relationship at boundaries, I wanted to use FDM (with all is disadvantages in shock capturing).
If there is a training code, so I can learn more, I'd also appreciate it.
I am working on the interaction of three water source factors and my response is the supply, I want to know the advantages and disadvantages of using CCD.
What should I do if I want to do acting snowmelt runoff using neural networks or management of water resources
The wastewater has very high COD (2000mg/l), low BOD (300mg/l), Total Nitrogen (900mg N/l). Should I do pretreatment before using anamox? If so, what is good pretreatment method in this case? What should I consider when installing an anamox reactor?
Chloride is a common inorganic anion in dye wastewater, ranging from 1.5 to 80 g/L. Could you please give me some suggestions for chloride removal in both industrial scale and lab scale? Thanks~
Relative humidity of 45% is observed during day time and increases slightly at nights in the location