Hi, Thanks for the document. I have just browsed through it. I get some hint of the enormity of the task looking at the document.
I am not a domain expert in the Lakes / Waterbodies / Storm water management. But having worked as part of /with teams on environmental projects mainly in Computer /Software / CAD part this is what I feel. The objective /task (whatever it is ) at hand need some people with a proven past domain expertise in that area who have done similar large (HUGE) projects. I think some expert from Central water Commission or some such large organisation only will be able to even asses the real enormity of the task. I do not know if any Activists (do not know what that would mean exactly) will be able to see the large picture. I read that @Sharad Lele was also a part of the committee so he will know much better. On Friday, March 24, 2017 at 4:05:05 PM UTC+5:30, Nagesh Aras wrote: > > Dear all, > > I am clear from the start that- > (a) we have daunting limitations, > (b) we need to have local survey data and > (c) we may need to pay for some of the expertise. > > But the recent lake rejuvenation program has thrown up possibility to > approach this in a proper way. > I am collecting ideas in that context. > > The original recommendations of the expert committee are posted here > <http://www.bdabangalore.org/Chapters.pdf>. > But there is no progress in any of the items. > Now there is a possibility that this program will be driven by activists. > > And those activists should have proper guidance from experts. > > Can we request the expert committee members to hold a workshop to debate > all options and develop a solution publicly? > > > On Friday, March 24, 2017 at 11:06:31 AM UTC+5:30, Sharad Lele wrote: >> >> @Nagesh: I strongly endorse Dilip's warning. And I would add another >> question: One needs to be clear what one is trying to find out (question >> comes before tool) and whether the answer is already approximately known >> before hitting it with a tool that has all the limitations Dilip mentions. >> So what is the question? >> >> For instance, we already know that the installed STPs don't operate at >> full capacity and that the problem is largely to do with clogged UGDs, >> broken UGDs and incomplete UGDs. E.g., Vrishabhavathy Valley STP has >> installed capacity of 180 MLD. One of the units does not work, so >> effectively 120 MLD. But even this 120 MLD consists of only 20-25 MLD of >> raw sewage coming from the UGD, rest is diluted sewage being picked up from >> the river. We have a published paper on V-Valley STP (mal)functioning. >> >> We also know that even as K&C valley STP capacity is being upgraded, it >> gets some of its sewage (60MLD) by pumping from the Agara side and will get >> another 100 MLD pumped from Ejipura drain (pickup point several km before >> drain reaches Bellandur). >> >> So any simple terrain-based analysis is pointless when on the one hand >> gravity-based movement is blocked by clogged UGDs and on the other hand >> pumping moves sewage around. >> >> Sharad >> >> On Thursday, March 23, 2017 at 9:04:21 PM UTC+5:30, Dilip Damle wrote: >>> >>> I would add that if anyone anywhere is even thinking of interpolating >>> ground levels then it is the biggest Blunder that can be done. >>> Unfortunately these days of software we have distanced ourselves from >>> ground realities and fundamentals and even such ideas are offered as >>> innovation/smartness and sold to ignorant management. >>> >>> On Thursday, March 23, 2017 at 8:33:17 PM UTC+5:30, Dilip Damle wrote: >>>> >>>> HI, >>>> >>>> I do not know your project nor whom you are working for. >>>> >>>> However I have worked professionally as a consultant On Many Water >>>> Supply, a few Sewerage projects and to a lesser extent on Stormwater >>>> projects. I also had my own water supply network software (before >>>> commercial software were easily available) with which I have done network >>>> planning for many large projects in different parts of the country. >>>> >>>> With that background I would say For a large city these kinds of >>>> projects involve a large PAID team with expertise in their own areas. Say >>>> my area was design and Hydraulics analysis but I can not work without >>>> another member without a GOOD site experience. So trying to look at these >>>> things just a s a software problems and getting help online may not really >>>> work. >>>> >>>> The most important part to start with is a real land survey to get >>>> actual ground levels. There is no way they can be estimated from anywhere. >>>> Unfortunately newer people do not understand the complexity of the >>>> issues. Also we try to fudge everywhere including survey. >>>> >>>> Your exercise will also involve analyzing the entire network existing >>>> and proposed. >>>> >>>> So any help from someone other than without a domain experience and >>>> responsibility against payment will be much less than a milligram of >>>> lipstick. >>>> >>>> If you think you can put together things from here and there, you >>>> cannot. If you could then you would not have asked here. >>>> >>>> >>>> >>>> *Availabee Digital elevation model is useless (inadequate) for this >>>> project.* >>>> >>>> Knowing Bangalore as the city where I will shift in near future and I >>>> live there (ALSO). I would say the following specifically about the city. >>>> >>>> Since it is highly undulated city there are advantages that you will >>>> get a good gravity assist in the network. But at the same time you will >>>> have many points from which sewage will have to be collected and pumped to >>>> the STP. This complexity and planning is HUGE. >>>> >>>> I just hope (for the sake of the city) that nonone is working with a >>>> shoestring budget on this one. Or the shoestrings are controlled by some >>>> other strings. >>>> >>>> Apologies for being forthright and clear on the issue. >>>> >>>> On Thursday, March 23, 2017 at 3:52:21 PM UTC+5:30, Nagesh Aras wrote: >>>>> >>>>> Hi >>>>> >>>>> >>>>> I would like help from users or QGIS (or ArcGIS) in analyzing the >>>>> sewage scenario in Bangalore. >>>>> >>>>> The rough idea is as follows: >>>>> >>>>> 1. We have the BWSSB STP locations and their capacity. >>>>> 2. We have the rain precipitation figures >>>>> 3. By analyzing the terrain (e.g. Digital Elevation Model from ISRO), >>>>> can we find the watersheds (catchment areas) for each STP? >>>>> 4. Can we estimate how much sewage and rainwater each STPwill get on a >>>>> day-to-day (or month-to-month) basis? >>>>> >>>>> Thanks in advance! >>>>> >>>>> Regards, >>>>> Nagesh >>>>> 9448239985 >>>> >>>> -- Datameet is a community of Data Science enthusiasts in India. Know more about us by visiting http://datameet.org --- You received this message because you are subscribed to the Google Groups "datameet" group. To unsubscribe from this group and stop receiving emails from it, send an email to datameet+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
