A brief on work done so far
Liaqat Hayat
Dear All
1. I feel we need to discuss now on 4 or 5 finally proposed treatments for the case understudy. This will be a very productive outcome for me to plan the arrangement accordingly from this planning to next stage. I agree with M.P singh that I can even change the site in a manner that our final recommendation fit into it. I was surprised during my site visit the importance given to environmental matters even in remote sites and other so many small communities are willing to participate. The idea of putting up pilot plant is two fold to improve water quality to save underground water contamination and secondly to put up a model to get performance result and lessons for future projects arrangement.
2. To sum up, we have so far discussed following options.
(a) By Liaqat Hayat as per attachment.
(b) By Jacky Foo submitted on 19/07/07
Canal/trench system like irrigation canal and the sorghum crops is grown beside the canal
(c) By M.P Singh submitted on 22/07/07
Restructure/dig a pond/ponds for 1-2 day's HRT. Make floats like the one's shown by Jacky Foo's posting taken from one of the papers by Paul T. You can keep them at about 1.25X1.25 meters. Take this effluent and leave it to flow in the open tract of land, which should be planted with Vetiver. Many thanks for his offer. I will respond later on this.
(f) May be I have missed one.
3. We need to review all this and after brain storming finally select one. With this I will have enough data to start the next phase. The other brief points which are to be deliberated upon yet finally are
- Size of ponds/CWL as the case may be.
- Plants with vetiver finally considered most suitable for the purpose.
- Any dos and donts for the system adopted.
- Listing of further actions to be taken in sequence till completion and operation of the CWL.
- Mosquitoes breeding.
With best regards and thanks for the very useful comments.
Liaqat Hayat.
Jacky Foo
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planning the details
Submitted by Hanns Pitot on Tue, 24/07/2007 - 16:13.
I think you could combine a) and b) into one approach, with the CWL
used as pretreatment, and so called ridge and furrow irrigation
(that's how I interpret Jacky's proposal) as final treatment/use of
the water.
What would be important to know for detailed planning would be the
water head available between the village and the creak, i.e.
difference of altitude.
Hanns-André Pitot
Jacky Foo
++++++++
constructed wetland: maintenance
Submitted by Jacky Foo on Wed, 25/07/2007 - 19:08.
To Liaqat Hayat
Q: what are your plans on the maintenance of the CWL ?
Q: who will do it and how will costs be covered ?
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Jacky Foo
http://www.iobbnet.org