[permaculture] Rainwater harvesting pond story

Suraj Kumar suraj at sunson.in
Tue Aug 11 00:14:23 EDT 2009


Hi Guys,

Your questions are all valid and my ideal shaped pond would have
looked exactly like a bowl. Minimal surface area, maximum volume. A
smoothly sloping pond would be, to mathematically put it, made up of
an infinite number of steps. In my case, its just 3 steps.

Each step decreases surface area of water exposed to sunlight.

However, the JCB operator mentioned in advance that the cost of the
operation will be proportionally expensive and time consuming - hence
we had to settle with 3 steps.


Cheers,

  -Suraj

On Tue, Aug 11, 2009 at 8:29 AM, Lisa Rollens<rollens at fidnet.com> wrote:
> Very interesting, Suraj, and quite a well done write-up.  I also do not see
> how the straight sides will stay that way.  Surely they will wash into
> gentle slopes.  Another consideration...what if someone falls in.  Can they
> he/she get out or would drowning possibility be high...esp a small child?
> That would worry me.  Even a dog would have a hard time climbing out without
> a slope.
>
> Just my first impressions, hope they're useful, Lisa
>
>
> ----- Original Message -----
> From: "Suraj Kumar" <suraj at sunson.in>
> To: "permaculture" <permaculture at lists.ibiblio.org>
> Sent: Monday, August 10, 2009 10:28 AM
> Subject: [permaculture] Rainwater harvesting pond story
>
>
>> Hi Guys,
>>
>> On our tiny acreage farm (1.86 acres), we recently finished building a
>> 3 stepped 3825 sq.ft. sized pond with a max depth of 22 ft. We had
>> three goals:
>>
>>   1. Store water for irrigation needs during the dry-seasons (post
>> monsoon and then pre-monsoon)
>>   2. Conserve the constructed pits / wells / dams / hedges / whatever
>> structure
>>   3. Storing run-away water / Retrieving stored water must be doable
>> using as little energy as possible
>>
>> We rented out a backhoe excavator (JCB-3CX) and two tipper tractors
>> for this job.
>>
>> http://wiki.sunson.in/rain_water_harvesting explains the design in
>> terms of satisfying these above three goals.
>>
>> Please feel free to let out your comments!
>>
>> Cheers,
>>
>>  -Suraj
>>
>> --
>> "The Greatest Shortcoming of the Human Race is
>> our Inability to Understand the Exponential Function"
>> Dr. Albert Bartlett
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-- 
"The Greatest Shortcoming of the Human Race is
our Inability to Understand the Exponential Function"
Dr. Albert Bartlett



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