How are temporary weights measured? It is not clearly understood. Is the final rate achieved by averaging the rating of all 142 experts? And if so then the rating value gets in decimal form.
Hi @Souvanik Maity. The NSFWQI was prepared by Brown with the expert opinion shared by 152 water quality experts selected when this method was designed. So during the process, when temporary weightage was assigned, the value assigned by all the 152 experts was average by Brown and that is why the value obtained are 0.17/0.15/0.8 etc Thank you
Hi @ Kashifa. As per NSFWQI, parameters selected for this method are fixed. and here is the link for Q-Value s3.amazonaws.com/chicagoriver/rich/rich_files/rich_files/1264/original/q-value-20analysis.pdf Thank You
Hi @ scahin shende. I would say the best WQI is the one that represents your objectives and the analytical data at its best. WQI method opted depends on the researcher's choice-making sure the study objective and data are represented and conveyed.Thank you
Is there a mathematical equation version of these rating curves or do we have to use the graphical means. it becomes cumbersome to do this for a large volume of data or if I want to automate the process. Please help.
If I neglect any parameter( 8 parameters ) like Phosphate and then modify the weightage factors proportionally and finally calculate WQI, will that be wrong?
Hi @Sajid Shahriar. Technically this method incorporates 9 water parameters. So all of these 9 parameters were assigned different weight factors (So if you compute the sum of all the 9 weight factors, the value is equal to 1). if you modify it, the weight factor will also be changed (the overall Wi value will not be equal to 1). But there are a few research papers that modify the same. How they do it, you can refer to these journals. Thank you
@@sajidshahriar6386 NSFWQI was design keeping in mind the 9 parameters incorporated and subsequently, weightage was pre-assigned to all parameters right at the time the method was developed. That is my understanding of NSFWQI. How you modify the weightage or add or remove some parameters depends on how you provide justification for the same. I think you know best about that Sir. Thank you
I want ask you a question If I don't have all 9 parameters how do we adjust the weights Please advise me on research papers and papers in which weights have been modified
@@JustLikeASteam thanks for replying I'm looking for how to recalculate the weights of the parameters used in the case of less than nine Kindly inform me of scientific papers
@@azzeddinereghais7494 I request you to kindly re-watch the video. In the video, there is a portion where how parameters are selected in this WQI method as well as how the parameters are assigned weightage. Thank you
For the "RATING CURVE (SOURCE OF Q VALUE OR SUBINDEX VALUE IN NSFWQI METHOD)" slide you have provided a pdf source for reference. Sir, can you please share that with me ? It would be great help then. I searched for this hard, but didn't find anything like that. PLEASE SHARE. It's a humble request from my side. Wating for your positive respose. Thank You
Yes sure @Debojit Thank you and keep supporting Always appreciate it s3.amazonaws.com/chicagoriver/rich/rich_files/rich_files/1264/original/q-value-20analysis.pdf
HI @Rasha Hussein. if you refer to NSFWQI, then the parameters are fixed. I hope you watch the video where this aspect was also discussed and also shows how the 9 parameters are finalized. Thank you
@@JustLikeASteam I just want to know how to calculate weights if I don't have all the paramitors or whether one paramit can be replaced by another and how the weight can be calculated for it.
@@rashahussein9270 I will request you to please re-watch the video. If you want to use NSFWQI you have to follow the WQI method only. i.e. Including parameters to be incorporated and weightage assigned. Thank you
Hi @ Vidya For WQI assessment, pH and DO are the only water parameters that have the ideal value of 7 and 14, respectively. It like a set standard value for such parameters. No matter what, their ideal value will always be 7 and 14. The rest of the water parameters ideal value is zero.Thank You
Sure sure I'm happy to see your request I m so grateful However it will take time I believe you can understand Preparation is taking a lot of time However continue supporting this channel and will be there one day Thank you so much
Thank You @Ashima. Valid questions. This method is pre-determined, that is You will find that the rating curve for temperature is limited to a maximum of 30 degrees. Thank You
In 8 days I will be publishing a spreadsheet to actually do this in Excel, not just sum up the final WQI, but actually find all the Q-Values from raw data. Using it I was able to find the WQI and generate graphs over time for 1321 samplings in less than an hour. Edit: ruclips.net/video/W_eV010ctzI/видео.html
@@saulompg I'll do you one better. Here's the video explanation: ruclips.net/video/W_eV010ctzI/видео.html Sorry for the delay, 28 credit hours was possibly a mistake.
The temperature calculation is wrong. The Q value curve is for delta temperature, which is the difference in temperature between a reference point upstream and the rest of the points measured. If you think about it, it makes no sense that only stream water at 0°C could get a 100 point score. It’s not even the optimal temperature for most water organisms.
@@azzeddinereghais7494 I am so grateful to you sir. Your kind words give me more power. Appreciate it so much. I will try to tag the subtitle too. Appreciate your feedback so very much.
TENQIU VERY MUCH MAI FREND
Your welcome my friend 😊
Excellent explanation and great content
I hope that your lessons continue
All thanks to you
Happiness is the result of your kind complimentr@t
Azzeddine REGHAIS. Thank you so much, Sir a
Very useful. Thank you very much
Thank You so much @ chitradevi R. Appreciate it
Terimakasih banyaaaak sangat membantu
Excellent lecture, plz upload a class on Multivariate analysis (PCA, CA,FA, CM, Simpler) for assessment of water quality. Advance thanks.
Thank you so much @ Shafiqui for the inspiratioin
Excellent video. Pls tell how we can build mathematical model on water quality index. Pls make some videos on this topic.
Appreciate it so so much @Kiran.thank you
🔥👍
Thanks, excellent. What is the best index to assess the quality of domestic effluent wastewater ,please?
Sir It depends on seasonal or one time assessment results required
How are temporary weights measured? It is not clearly understood. Is the final rate achieved by averaging the rating of all 142 experts? And if so then the rating value gets in decimal form.
Hi @Souvanik Maity.
The NSFWQI was prepared by Brown with the expert opinion shared by 152 water quality experts selected when this method was designed.
So during the process, when temporary weightage was assigned, the value assigned by all the 152 experts was average by Brown and that is why the value obtained are 0.17/0.15/0.8 etc Thank you
Can you please make a video on how to calculate Eutrophication index, organic pollution index, comprehensive pollution index
I'll look into it. Thank you 😊
Can we use Total coliform instead of fecal coliform??? Also can you please tell where can i get the rating curve??
Hi @ Kashifa. As per NSFWQI, parameters selected for this method are fixed. and
here is the link for Q-Value
s3.amazonaws.com/chicagoriver/rich/rich_files/rich_files/1264/original/q-value-20analysis.pdf
Thank You
@@JustLikeASteam Thank you so much 🙂🙂🙂
@@likeariver7 Happy to help. Please continue to support. thank you sir
@9:00 mins, of the video, yu have given the formula for NSFWQI, should the value of the index i start from zero or one?
Which one is best method for determining water quality index?
Hi @ scahin shende. I would say the best WQI is the one that represents your objectives and the analytical data at its best. WQI method opted depends on the researcher's choice-making sure the study objective and data are represented and conveyed.Thank you
Where do I find the curves for measuring q value? Is there any website for automation to find the q value?
Can you please explain the calculation of CPCB?
Is there any relation ship between CPCB and NSF?
Thank you @Riya. I can keep that in mind maybe I can add that in the future in this channel. Thanks again
Is there a mathematical equation version of these rating curves or do we have to use the graphical means. it becomes cumbersome to do this for a large volume of data or if I want to automate the process. Please help.
No. As per this method, you have t adopt the rating curves only
Thank you 😊
What if there is a missing sample for one parameter and the 9 is not complete? Lets say only 8 parameters? Can this method still be used?
This particular WQI method is based on the.9 selected paramters. So It has to be these 9 paramters. Thank you
If I neglect any parameter( 8 parameters ) like Phosphate and then modify the weightage factors proportionally and finally calculate WQI, will that be wrong?
Hi @Sajid Shahriar. Technically this method incorporates 9 water parameters. So all of these 9 parameters were assigned different weight factors (So if you compute the sum of all the 9 weight factors, the value is equal to 1).
if you modify it, the weight factor will also be changed (the overall Wi value will not be equal to 1). But there are a few research papers that modify the same. How they do it, you can refer to these journals. Thank you
If I use less than 9 parameters, will that be totally wrong?
@@sajidshahriar6386 NSFWQI was design keeping in mind the 9 parameters incorporated and subsequently, weightage was pre-assigned to all parameters right at the time the method was developed. That is my understanding of NSFWQI.
How you modify the weightage or add or remove some parameters depends on how you provide justification for the same. I think you know best about that Sir. Thank you
Thanks for the information
And thanks for your works. Very helpful, indeed.
@@sajidshahriar6386 I am so happy that I can help. Thank you my Friend and all the best
I want ask you a question
If I don't have all 9 parameters how do we adjust the weights
Please advise me on research papers and papers in which weights have been modified
Sir If you refer to NSFWQI then the parameters are 9 in total and are also fixed. Thank you
@@JustLikeASteam thanks for replying
I'm looking for how to recalculate the weights of the parameters used in the case of less than nine
Kindly inform me of scientific papers
@@azzeddinereghais7494 I request you to kindly re-watch the video. In the video, there is a portion where how parameters are selected in this WQI method as well as how the parameters are assigned weightage. Thank you
@@JustLikeASteam I will watch it again
Please also explain to us in the future entropy weighted water
quality index (EWQI)
@@azzeddinereghais7494 I will try in the near future. Appreciate it so very much.thank you again
For the "RATING CURVE (SOURCE OF Q VALUE OR SUBINDEX VALUE IN NSFWQI METHOD)" slide you have provided a pdf source for reference. Sir, can you please share that with me ? It would be great help then.
I searched for this hard, but didn't find anything like that.
PLEASE SHARE. It's a humble request from my side.
Wating for your positive respose. Thank You
Yes sure @Debojit
Thank you and keep supporting
Always appreciate it
s3.amazonaws.com/chicagoriver/rich/rich_files/rich_files/1264/original/q-value-20analysis.pdf
@@JustLikeASteam Thank You 😊😊
Hello Professor, can I change the parameters and if I change where I get or how I get the rest of the weights
HI @Rasha Hussein. if you refer to NSFWQI, then the parameters are fixed.
I hope you watch the video where this aspect was also discussed and also shows how the 9 parameters are finalized. Thank you
@@JustLikeASteam
I just want to know how to calculate weights if I don't have all the paramitors or whether one paramit can be replaced by another and how the weight can be calculated for it.
@@rashahussein9270 I will request you to please re-watch the video. If you want to use NSFWQI you have to follow the WQI method only. i.e. Including parameters to be incorporated and weightage assigned. Thank you
Sir didn't understand the ideal value for ph
Hi @ Vidya
For WQI assessment, pH and DO are the only water parameters that have the ideal value of 7 and 14, respectively. It like a set standard value for such parameters. No matter what, their ideal value will always be 7 and 14. The rest of the water parameters ideal value is zero.Thank You
Can we consider only 6 parameters out of 9 ?
Not for this method. It must be 9. Thank you 😊
can you please explain Trace metal index and Hazard index
Sure sure
I'm happy to see your request
I m so grateful
However it will take time
I believe you can understand
Preparation is taking a lot of time
However continue supporting this channel and will be there one day
Thank you so much
Rating curve source link can be given?
I believe it provided in the video. Kindly paused the video and accordingly type it will be easy to find ok.thank you 🙏
What if temp is more than 30?
Thank You @Ashima. Valid questions. This method is pre-determined, that is You will find that the rating curve for temperature is limited to a maximum of 30 degrees. Thank You
Do you have a excel spreadsheet to calculate NSF wqi values
If phosphate value is zero wat will be q value
Hi..
Can i have a pdf copy of this lecture please?..
In 8 days I will be publishing a spreadsheet to actually do this in Excel, not just sum up the final WQI, but actually find all the Q-Values from raw data. Using it I was able to find the WQI and generate graphs over time for 1321 samplings in less than an hour.
Edit: ruclips.net/video/W_eV010ctzI/видео.html
That is a great news.
Congratulations Sir
Thank you 😊
Hi... Do you can share the Excel spreadsheet?
@@saulompg I'll do you one better. Here's the video explanation: ruclips.net/video/W_eV010ctzI/видео.html
Sorry for the delay, 28 credit hours was possibly a mistake.
@@rowanmccarthy9307 Thank you, I watched your video, helped me a lot to understand how make the conversion of data in score Q-value.
The temperature calculation is wrong. The Q value curve is for delta temperature, which is the difference in temperature between a reference point upstream and the rest of the points measured.
If you think about it, it makes no sense that only stream water at 0°C could get a 100 point score. It’s not even the optimal temperature for most water organisms.
It even says it in the curve you used: “Chart 7: CHANGE in temperature” and it is denoted with the delta symbol before the T
Name some Indian methods to find out water Quality
If the translation can be placed for us
Do you mean subtitle, Sir?
@@JustLikeASteam yes
@@JustLikeASteam I follow you and I like your explanation
You have some videos that do not contain subtitles
@@azzeddinereghais7494 I am so grateful to you sir. Your kind words give me more power. Appreciate it so much. I will try to tag the subtitle too. Appreciate your feedback so very much.