Water Resources Engineering - Science topic
Water Resources Engineering is a sustainable planning and management of water resources.
Questions related to Water Resources Engineering
I feel that, in water resource management activities (specially flood management), most of the developed software tools are not widely or continuously used. The reason may be either the decision makers work independently from project to project or fully /partially automate the required processes unique to the project.
I would like to know your experiences as well as comments on the utilization of the software tools to assist flood management decisions.
I am conducting a Faculty Development Programme (FDP) in Environmental Engineering, Remote Sensing and GIS, and Water Resources Engineering titled 'Recent Advancements in Waste Remediation, Geo-Spatial Techniques, and Hydrologic Systems' for one week in online mode.
Attaching the brochure for the same.
The idea behind this FDP is to have creative and out-of-the-box discussions. The speakers identified are from leading academia, research and industry domains.
Anyone interested can register!
I came across a lot of peer-reviewed journal articles and most of the authors have concluded there is a climate change phenomena happening by applying Mann-Kendall Trend test on Hydro-Metrological variables (rainfall, temperature). It has to noted that Mann-Kendall is a statistical technique which on applied to dataset (including time series) shows whether there is a monotonic increasing or decreasing trend & whether that trend so arrived is statistically significant or not ?
My question is that how we can conclude the trend detected is due to climate change only without citing any physical process/phenomena (like Teleconnections) drives this change ?, that too based on Statistical test (Mann-Kendall) at a particular Level of significance (LOS).
The LOS applied is also statistically subjective and the value can vary from person to person?
The salinity of groundwater doesn't suffice for simulation purposes. The initial salinity of soil profile is necessary.
Also please name your favorite book of Open Channel Flow/Hydraulics you follow for your research and academic activities.
Dear Researchers: Given the limitation of drip irrigation towards groundwater recharge, how one can develop approaches to associate it with groundwater recharge techniques via artificial or natural means?
i am a beginner to this software CCHE2D. So if anyone is familiar to the use of this software can help me.
Is anybody familiar with AquiferWin32 ver 4.0?
I need a jump start on how to run this program, specifically how to add background in the model, add well and then run. Thanks.
I want to run 5 different models to estimate stream flow. In order to optimize the characteristics of these models I use Taguchi method. So I have to run different models according to the Taguchi orthogonal array. Therefore, I have different models with different inputs and different data lengths. For example the first test is: using rainfall and temperature in ANFIS model with 2 year data length, while the second test is: using rainfall, temperature and discharge for previous day in SVR model with 10 year data length. So, the inputs, Data length and model type is changing in these tests. What is the best performance evaluation criterion for this study? NRMSE can be a good criterion because it normalizes the RMSE and in this way, it removes the effect of data range.
Now, I want to know if there is any better solution for this problem.
There is a screenshot of variables and I need to know what is the difference between number 1 to 6? and which one I must use in my work?
Would you please let me know if the following is accurate as an answer to the question:
Suppose we have sensors which measure the volumetric soil water content of a soil layer for a long period (more than 6 months) and also high temporal resolution (half-hourly). Could I assign the maximum in this dataset to the saturation point?
I understand that we do need to have a lengthy rainfall event, how long the event should be so that the above proposal works?
And if there is any other way that I can get to the saturation point of a soil layer from the volumetric soil water content data/sensors, please let me know.
Mostly focused on the topsoil and preferably only using the dataset.
I'm working on a project that relates flooding to adequate Drainage system.
The project is area based (NSUKKA, Enugu Nigeria). Nusuka could be seen to have the geological features as stated above
What would be the implications of an unanticipated drastic rise in the water surface elevation in the inlet channel upstream of an inverted siphon with all the rest design parameters (e.g. discharge, downstream water elevation etc) remaining the same as considered in the original design? What kinds of malfunctions would affect the siphon's operation in that case?
I am friends I am calibrating stream flow using SWAT-CUP. While altering the parameter ranges to get the best simulated result, how to fix ranges for parameters.
Please help me in this
Currently, the combined effect of all clouds is one of net cooling, meaning that clouds are dampening the rate of climate warming. But scientists are looking into whether clouds will have the same effect on climate as the Earth continues to warm. If the proportion of different cloud types changes, it could affect the rate of climate change because different types of clouds have different impacts on the Earth's climate. While some types of clouds help to warm the Earth, others help to cool it?
I have seen that normally available river flows divided by the population of the country is taken as water availability (cubic meters per person per year) for the country. I feel that available rainfall below the measuring points for river flows should also be included towards water availability calculations.
I want to know the opinion of other colleagues in this regard.
Any model output depends on its parameters. SWAT is a conceptual model, it contains an enormous number of physical and process-based parameters to capture real-world behaviour. The physical parameters which we can measure directly and the process-based parameters which cannot measure directly and it has to go through calibration or optimization. While optimizing the model, we will select the influential parameters. But, during the screening of influential parameters itself contains huge uncertainty like:
1. Which parameters have to select?
2. How much range has to take for selected parameters?
3. If we select more parameters, complexity and optimization will increase
4. Which method has to adopt for deriving the parameter value like Absolute, Relative or Replace?
Are any optimal methods available to select parameters and its range?
Dear hydropower Experts,
The Joint Research Centre is opening up a consultation in order to identify which are the most innovative technologies in the hydropower sector.
Ideally we are interested in technologies that have the following characteristics:
• Radical new technology/concept, not achievable by incremental research.
• On an early stage of development: Technology Readiness Level (TRL) preferably not more than 3
Thank you very much.
According to your practical experience, which formula, out of the following three, is more reliable for calculating head loss in water supply pipes and provides better results when compared to the actual values?
I had finished daily evapotranspiration calculation,but it is necessary to do the temporal upscaling. Can anyone give me some advises?
We have started a mini research on why water treatment system present in our college failed so early? It was built in 2011.
6th Vienna young Scientists Symposium, TU Wien (Vienna University of Technology), Austria
June 25-26, 2020
Consisting of four mini-symposia, the symposium has an overall theme of "Technology, Science, and Design for a Sustainable World". The themes of the mini-symposia are:
• Innovative Materials and Green Chemistry
• Energy and Resource Engineering
• Sustainable Buildings, Cities and Infrastructures
• Environmental Analysis and Modeling
Abstract submission deadline: March 15, 2020
"The purpose of the innovative platform Vienna young Scientists Symposium (VSS) is to enhance the interdisciplinary professional exchange between members of the TU Wien." "All scientific staff and students of TU Vienna are cordially invited to participate in this event as speakers."
More information at: https://vss.tuwien.ac.at/home/EN/
#VSS2020 #TUWien #scientists #symposium #technology #science #design #sustainableworld #sustainability #innovation #materialsscience #greenchemistry #energy #resourceefficiency #sustainablearchitecture #sustainablebuilding #sustainablecities #sustainableinfrastructure #architecture #urbanplanning #urbandesign #civilengineering #climatechange #research #environmentalanalysis #environmentalmodeling
I want to use 71 climate stations in my research. The variable that I'm dealing with is Monthly precipitation and temperature. Each station has <=15% missed data were scattered throughout 30 years of monthly data. I want to fill missing values in these stations. How to use the regression method when other nearby stations have missed data too?
Is there any simple and proofed approach for filling missed monthly precipitation and temperature data in one station using itself data?
Any advice is so appreciated.
Dear fellows. I wish you a good day.
I am planning to perform RVF analysis for open channel flows. Before I move forward, I want to make sure I have a suitable apparatus within my reach. Please share your experience on the question above. Your guidance in this regard shall be highly appreciated.
Thank you very much.
Procedure for finding Shields curve for pure sand sediments are available like Van Rijn formula. but for the case of cohesive sand/cemented sand this procedure can not be applied. suggest the applicable procedure for finding critical shields parameter in order to establish the curve.
Thank you for your interest.
I am trying to assess how water resources evolved after increasing drought due to climate change.
I am in search of latest topics in the field of Open Channel Flow and Hydraulics for my research work. Your suggestions in this regard shall be highly appreciated.
Which are related to technical knowledge as well as to knowledge about the environment
I have a question about your work (Fuzzy Logic).
In forecasting something using FIS toolbox (in matlab) how to use previous output (T-1) as one of inputs?
Would you please explain a little about the difference between Prediction and Forecasting, in Hydrology. Because I see them used differently in Hydrology books and they try to give definitions about them, but in the end, I can't grasp it fully.
Are they totally separated? Or they overlap in some fields or variables?
For many years, the consumption of clean water and minerals of energy resources and strategic industrial raw materials, such as metal ores necessary for various branches of the manufacturing industry, have been growing at a faster rate. On the other hand, the pollution of the natural environment grows, the degradation of the natural environment through mines extracting energy minerals. The amount of waste on dumps of unsorted municipal waste is growing, as well as litter that pollutes the natural environment. More and more plastic waste floats in the seas and oceans. The scale of degradation of the natural environment through the development of human civilizations is increasing.
The goal of counteracting these unfavorable processes of human civilizational activity is to carry out pro-ecological reforms in the energy sector consisting in the transformation of the classical energy based on the burning of minerals for the construction of new power plants producing renewable energy. Reforming the energy sector is necessary to reduce greenhouse gas emissions and the increasingly rapid global warming process. It is necessary to develop eco-innovations thanks to which plastic in packaging will be replaced with quickly biodegradable and / or consumable materials. Waste segregation systems and electromobility should be improved. More funds from public funds of the state should be allocated for the implementation of pro-ecological reforms of reclamation of a degraded civilization environment and the implementation of nature conservation programs, natural ecosystems and biodiversity.
However, all those ecological ones necessary to carry out the reform will not ensure achieving in a global perspective fully sustainable pro-ecological development if in subsequent years the consumption of natural resources, especially water and earth's energy and other minerals indispensable for various branches of the production industry. Therefore, in order for the implementation of fully sustainable ecological development to be possible in the future, the increase in the exploitation of natural resources, especially non-renewable natural resources, should be significantly reduced.
Do you agree with my opinion on this matter?
Therefore, I am asking you the following questions:
- How should the use of unrecognized natural resources be reduced so that sustainable ecological development is possible?
- Is it necessary to pursue a model of zero economic growth?
- Should the implementation of the zero-growth model be mainly based on reducing the consumption of natural resources?
- How should the use of non-renewable natural resources be reduced so that sustainable ecological development is possible?
- Will the protection of nature, natural ecosystems and biodiversity significantly increase by reducing the use of non-renewable natural resources?
I invite you to the discussion
Thank you very much
i'm working on Hydraulics particularly on Scouring,
i have Scour depth data and Parameters affecting to scour. now i would like to carryout sensitivity analysis on the parameters to predict the scour.
Currently i don't have the scour model, based on data i would like to carry out Sensitivity analysis ,
please suggest some suitable method for the sensitivity analysis.
We observed a huge difference between simulated and observed outflows from a catchment during a hydrological modelling exercise in HEC-HMS. The catchment contains numerous ponds and smaller lakes (of varying areal extent), lacking operational data. How can we account for the effect of these storage structures in the hydrological modelling?
What data do we need?
I got 35 years of daily data of rainfall and river discharge.
I am working on this project for my final year research project in civil engineering.
What is the main challenges in water sector based on main events? (like drought, flood, agriculture, industry, etc)
I'm looking for a framework or divide of challenges in this manner.
like we can say in agriculture main challenge could be the low efficiency of irrgation.
The sand body on the river bed is 9 meters thick. It consists of medium and coarse sand. The stream course on the river changes course and hence direst pumping stations for irrigation are adversely affected. The base flow is the only alternative left for exploitation.
I am teaching undergraduate 3rd and 4th year students the course "sustainable management of water resources"
I really appreciate if anyone can help me with teaching materials or text books for this subject.
Lets stay sustainable and ensure our tomorrow,
Range of Variability Approach, is introduced in the D. RICHTER 1997 article , "How much water does a river need?" for designing "management targets" for the eco-friendly river management.
My question, is how one can or what are the considerations to design hourly targets based on that approach and those 32 indices he introduced in his seminal 1996 article.
( Should we obtain daily or hourly streamflow records ? but the indices Richter designs targets from are monthly )
Has anyone a complete data of a coastal aquifer to simulate saltwater intrusion using GMS software?
for given configuration of five sphere sand particles in two rows.
mathematically modelling of sand particle(dia =0.5mm) movement in sand bed under hydro dynamic drag force, which resisted by friction between the particles and self weight of the particles. How to find the distance moved?
want to find the energy required to move the particle in rough bed and smooth bed condition.
In climate change impact studies, drought assessments need longer series of data to evaluate.
I need an output discharge of various flow rates varying from 0.5 to 15 liters/minute at a constant pressure of around 0.7 bar; could you please suggest to me which type of pump can be used to achieve these conditions?
We are trying to estimate the Raindrop Size Distribution of our Artificial Rainfall Simulator (Perforated Tray Method with mechanical pump machine) and looking for the best but affordable method (both technologically and financially) for estimating Raindrop Size Distribution specially in the tropical weather of Bangladesh.
I request you to list some major factors or phenomenal difference between Stream bed erosion and soil erosion.
River flow causes soil erosion. The finer soil particle eroded as suspended particles and the eroded coarser particles settles down after some time and again the cycle of erosion and deposition continues. In this process water and soil two major things. in such a situation how does water availability in the river related to the sand mining related.
name the parameters like depth, quantity of sand eroded,flow , etc...
give the method or formula to find the depth -averaged water flow velocity in a rectangular open channel.
I want to model the sand erosion. specifically particle movement in the sand bed under the influence of flowing water. suggest some model if already present.
I.e. the method that will produce results in determination of aquifer free from such type of contaminants.
In one aspect , water resources engineering(WRE) , has a general and macroscopic way of thinking and studying about the environment and water in any form .
Computational fluid mechanics and numerical methods to solve related equation sound a little off-topic or if better stated , prevent a student from WRE to concentrate and address a comprehensive enough study and career about water management .
Can a WRE student work and tackle numerical problems solely for a research and feel comfortable that he is not going too much stray ! ?
What I mean is , will a WRE student be criticized or underrated in any way in future why he worked on too much detail of governing equations of a water resources subject rather than a more general or managemental view ?
For my thesis I am currently working on a set of hydrological models. All models were calibrated with a multi objective calibration (logNSE, pbias and RSR). Now I want to compare the results, but I am not quite sure how to do it. The most easy way would be to just use a table with all values, but this is hard to comprehend for a reader. Therefore, I would like to make a visual comparison. But this is quite difficult as the objective functions all have a different scale and optimal value. Any ideas?
I already tried it using a three-dimensional scatterplot, but this resulted in a not very overseeable figure.
Both bridge abutment and spur dike acts as obstruction to flow and allow water to move downward and generate horseshoe vortices so that scouring occurs around each of them. Since, both are generating horseshoe vortices and plunging water downwards to enhance scouring, will the scouring pattern be same around each of the aforementioned structure?
I am trying to measure evapotranspiration using SEBAL method. I am using landsat 8 data. In the process I have converted DN to radiance, then radiance into corrected reflectance. I am using corrected reflectance bands 4 and 5 of landsat 8 for calculating NDVI. The NDVI image is displaying a range much beyond the limits ( above 10000 and below -3000). What could be the problem?
Any help is highly appreciated. Thanks in advance.
Does anyone can share paper/knowledge about the methodology for analysis of water balance in tropical peat area?
I am looking for a reference (book, paper...) where to find a clear explanation of the different techniques that can be used to implement boundary conditions for 2D shallow water equations with a finite volume implementation. Can anybody help ? Thanks a lot in advance. Marco
I do a research about christianity & it's impacts on iranian art, but I have not seen a book or article about this in Iranian documents (in persian language). If some one knows references about this, pls. help me!
thanks a lot!
I am looking for the value of the HDI, that it would be possible to separate USGS gauges to non-urbanized, semi-urbanized and urbanized watersheds based on that. As I am working in the ArcGIS, I need quantitative values for this index.
I am working with arcmap10.1. It gives me error for not executing the function of exporting values to points. Although just a day before it was working very good.
What is the cause for the error and how can i avoid it?!!
I am trying to create a framework to understand urban water services (drinking water, waste water and surface water) from an institutional point of view. I see that there is profound disagreement about what governance actually is. After some reading my conclusion is that governance is a process that brings actors to create/modify/reinforce institutions (the social structure: the rules of the game, formal and informal, i.e. rules, norms and cultural-cognitive elements), so this institutions shape the behavior of all stakeholders. Do you agree with this interpretation?.
How can "management of services" fit in this framework?. Is management also a process limited and enabled by the institutions created/modified/reinforced by governance?
I appreciate you comments
we want to calibrate our Arcswat model for the case study, our objective is to use the resulted runoff and crop yield in the area. so I have some questions:
1-which kind of observed data are suitable and should be used in the calibration?
2-we have lack of observed data: so can we use soil data for calibration?
Thanks for the responses.
What is the best way to :
1. Model subsurface drainage (and irrigation) using perforated pipe.
2. Model water table under
3. Model soil moisture distribution
simultaneously. Is there any model that can accommodate the development of 1+2+3 model to evaluate effectiveness of farmland sub-drain system
Rainfall of a basin can be calculated by thiessen polygon method and contribution of every rain-gauge can be determined using Arcmap. Kindly guide me how to figure out rainfall for every sub basin of a basin? how to calculate rainfall contribution of rain-gauges for sub basin 1, 2 and 3 in the attached figure. Is there any other toll except arcmap where we can apply thiessen polygon? If any one have tutorial kindly share.
I am preparing a field work on irrigation managment in citrus trees. I am thinking of using wireless AquaCheck capacitive probes. And It would be helpfull to learn from other scientists experiences (reliability, repeatability of measurements, quality of signal transmission, suitability to soil types).
Which one of this level of processing for Satellite data ( COSMO SkyMed ) will be good for my study.And I am ordering STRIPMAP HIMAGE. Mostly, I will be using for DEM extraction, river cross section extraction, Landuse/landcover etc.
1. Level 0( RAW)
2. Level 1A( SCS) - Single Look Complex Slant
3. Level 1B( MDG) - Detected Ground Multi Look
4. Level 1C( GEC) - Geocoded Ellipsoid Corrected
5. Level 1D(GTC)- Geocoded Terrain Corrected
I am researching on runoff processes in multiple watershed and trying to develop a story using the outcome from different watersheds. I was wondering what should be considered as good questions that I need to ask myself to develop a clear and complete story of runoff process in my research areas?
I am delineating a basin in the river Nile using Arcmap (spatial analyst tool), during delineating the sub-basins and defining different outlets, the result is one watershed consisted of all the sub basins! why is this happening ? in the past i delineated the sub basins and they appeared separated right.
Attached picture with the merged sub basins in green and the blue circles is on the place where sub-watersheds are merged.
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.
In ANN we get output in workspace that we can copy paste in Excel sheet. But in ANFIS it is not possible to get testing output as a single file, I am doing modelling in evapotranspiration. I have 4 inputs (temp,humidity,solar radiation,wind) and one output (evapotranspiration).
Textual sources may include rule-making comments, recorded or transcribed public comments, transcribed public hearings, blog comments, letters to the editor, emails, etc.
I am especially interested in sources which might reveal concerns over threats to the sustainability of local groundwater sources or instances where there might have been conflict over groundwater.
Let's try to make an updated challenges list for arid regions hydrology
I am looking in to existing Water Management Practice in India and how they can be replicated in South Sudan to address the existing water management challenges.
The work will base on case studies, both primary and secondary data collections.
After going through various practices commonly used in highland and lowland, then the best practices will be recommended after rating is done with water experts in Africa through some interviews.
I am seeking some materials support on this case studies and other vitals research works on Water Management Practice in India in lowland and highland..
Any kinds of supports will be greatly appreciated.
Can seepage meters be used to estimate groundwater discharge at seepage faces above the waterline?
Have Regime Equations in designing canals usefulness?
BUT Take into account that canals have routine maintenance program or growing of vegetation
Data about water use in m3/s in Vientiane province in Lao PDR?