Re: Watering Numbers

I will try to help clarify some of those watering issues:

A submersible sump pump is a pump that likes to pump lots of water, volume
gpm.  The water it pumps in most cases helps keep it cool.  If you connect
it to a sprinkler head, you cannot pump enough water to keep the pump cool.
Pumps are sold in two fashions, a pump that pumps alot of gpm or a pump
that can generate head (which is pressure).   A lot of this can be found on
a pump curve which tells you the gpm at what pressure (or head).   1 foot
of head is = to 0.433psi    So 50 foot of head is equal to about 21 psi.  
You can get pumps that have both good gpm and supply plenty of head.   But
mostly for pumpkin growing, since you are only using misters or low gpm
sprinkler heads, a pump with good head (pressure) is great to use.
I have been putting together some spreadsheets in Excel to help with my
system that I want to design.   Below is some data I would like to share.  
It might help some growers in putting together a system.

Nozzle Spray Radius             how many gallons for 1" of water fall
        20'                     782
        19                      706
        18                      634
        17                      565
        16                      501
        15                      440     
        14                      383
        13                      330
        12                      281
        11                      236     
        10                      195     
        9                       158
        8                       125
        7                       95


nozzle output in gpm            gallons, 30 mins a day, 4 days  gallons, 20
 min day, 4 days
        0.5                     60                      40
        1.0                     120                     80      
        1.5                     180                     120
        2.0                     240                     160
        2.5                     300                     200
        3.0                     360                     240
        3.5                     420                     280             
        4.0                     480                     320
        4.5                     540                     360
        5.0                     600                     400
        5.5                     660                     440
        6.0                     720                     480
        6.5                     780                     520
        7.0                     840                     560

With this information I can pick out a nozzle with a gpm and radius, then
figure from the tables how long I need to run this nozzle per week to get
my 1" of water fall.   You can mix and match.
Example:   I personally need a 12' radius nozzle, so from the table I need
to put out 281 gallons to get my 1" of water fall.   So I would pick the
3.5 gpm output nozzle and water 20 mins a day, 4 days a week.
I hope this helps.

Bill  Sadowski,  in Ohio and getting warmer each day

---------------------------------------------------------------------
Pumpkin-growing FAQ: http://www.mallorn.com/lists/pumpkins/search.cgi
To sign-off this list, send email to majordomo@mallorn.com with the
message text UNSUBSCRIBE PUMPKINS
Other Mailing lists | Author Index | Date Index | Subject Index | Thread Index