Editing Gravity fed drip irrigation, semi-automated

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== Gravity fed drip irrigation, with the intent of complete, hands free automation. ==

Welcome, you've arrived at the Global Goals clubs challenge WIKI. We ask you to see this as a possible starting point to a new beginning. We hope to prove to the world, that if we use the SDGs as a guideline, a starting point in the search for simple solutions to impossible problems like poverty and hunger. If each of you reading this works toward even one small answer, the millions of small steps when combined into big steps, could be enough to change the world. We view Appropedia as a playground for people who love to try new things. We beg you to look around, find something which would make life simpler for those in need and make it better. We know there are better ways to do almost anything, maybe you'll find some of them.

What follows is an example of a simple yet effective way to create an abundance of fresh vegetables in a small space with minimal resources. See it as an example for the challenge. We ask you to create a wiki about your project and keep the world informed of your status.

Our wiki is free to to copy and improve upon! We used off the shelf products at a normal prices, but are searching for ways to replace them with home made versions, preferably from recycled plastic. We challenge you to prove that the world can still be saved, we simply need to begin. Find a way to mix cheap modern technology into the SDGs to answer as many of them as you can.

The project below attempts to answer problems within a multitude of SDGs simultaneously. At the end is the begin of an outline of possible improvements which could be created to enhance our garden or go off on a new tangeant.

Goal: To prove that by mixing fresh vegetables with science, recycled plastic, computers, computer networking and social skills, the poor starving people of the world can be fed at a minor cost, weighed against the benefit to mankind. The garden and ideas demonstrated here are in the public domain, free for anyone, anywhere to use. In exchange we simply ask that you find a way to help in reaching the Global Goals and especially Zero Hunger by 2030!'''

[http://www.globalgoals.org/ This goes to the global goals!]

=== Intro ===

Welcome to our garden! What began as an experiment, has turned into a working garden which can run alone for several weeks at a time using rain water. The garden presented is small scale, approx. 30 plants, but can easily be expanded simply by adding more branches from the above ground tank and filling it more often. It's main purpose was to eliminate the carrying of water, eliminate guess work and wasted water, while ensuring that the harvest is never at risk due to lack of water. The main benefit was that the automation worked so well that a 4 week vacation could be taken in the middle of the growing season. Only 3 things limit its effectiveness; drought, pump outage and overly dirty water.

=== Our greenhouse drip system ===

20 Square meters, 4 x 5
Not heated, so does freeze at night in the winter.

==== [[File:DripGarden2.svg|thumb|center|Simple representation of the system]] ====

=== Parts List ===

Since we have no more water pressure than gravity gives us, it only needs to be watertight. Here's a list of the parts we used, but we've begun to create 3D printed alternatives to reduce cost.

* 1 X 4000 liter underground tank (could be any size)
* 1 X pump (can be human/wind/solar or anything else powered)
* 1 X 100 liter above ground tank (again size unimportant)
* Hose - Enough to get the water out of the big tank and into the small one
* [http://www.gardena.com/ca/en/water-management/micro-drip-irrigation-system/l-joint-13-mm-1-2 4 X 90&deg; 1/2" tubing connector]
* [http://www.gardena.com/ca/en/water-management/micro-drip-irrigation-system/t-joint-13-mm-1-2 3 X 90&deg; 1/2" T tubing connector]
* [http://www.gardena.com/ca/en/water-management/micro-drip-irrigation-system/t-joint-13-mm-1-2-46-mm-3-16 30 X 1/2" > 1/4" reducer T's]
* [http://www.gardena.com/ca/en/water-management/micro-drip-irrigation-system/adjustable-endline-drip-head 30 X Drippers]
* [http://www.gardena.com/ca/en/water-management/micro-drip-irrigation-system/connecting-pipe-13-mm-1-2 1/2" tubing - enough to reach all plants]
* [http://www.gardena.com/ca/en/water-management/micro-drip-irrigation-system/supply-pipe-46-mm-3-16 1/4" tubing - enough to reach all plants]
* 1 X Sand and Gravel filter made from: (links to follow later)
** 1 X 30 liter tank with screw on top
** Gravel
** Small stones
** Sand
* About a million connectors of all makes and models

=== Replacements ===

 The following files are on a slow server. Have patience!

* [https://www.thingiverse.com/thing:4078633 Various parts I created]
* [https://www.thingiverse.com/thing:2896770 Dripper holder]
* [http://www.thingiverse.com/thing:1689007 Non-adjustable dripper/holder in one]
* [https://www.thingiverse.com/thing:3607193 T-connector]
* [https://www.thingiverse.com/thing:3608825 L-connector]
* [https://www.thingiverse.com/thing:2882952 A nice collection]

== An impression of our garden ==

===<gallery >
|width=180
|height=99
|padding=5
|lines=4
|align=center
Image:HPIM2729.JPG| Initial coarse filter
Image:tank_and_filter.jpg| Above ground tank + filter
Image:Gardena adjustable dripper.jpg| The drippers I used
Image:1st try middle spring 2013.jpeg| My 1st attempt
Image:FreshlyPlanted.jpg| April, shortly after planting
Image:4_Aug_15_Left_Side_Tomatoes.jpg| 4 Aug. left side
Image:My_Tomatoes.jpg| Right side on 5 Sept.
Image:Filter V2.jpg| Improved filter w/air release
Image:Start year 3_20160512.jpg| A new year begins
Image:Another filter.jpg| An even better filter!
</gallery >===

[[Media:Drippers with cleaning.ogg|Drippers running, one slow, so it gets cleaned]]

The drippers are adjusted to provide approx 100ml of water per hour when the tank is full and will gradually decrease during the day as the tank empties. I estimate that each plant receives 2l water over a 24 hour period. At this time the tank is refilled, bringing the drip speed back to 100ml per hour. With time, dirt and/or algae collect on the dripper, decreasing output and must be cleaned away. We use an old toothbrush to clean and open the dripper to full open to flush dirt out of the tubing and dripper.

Grass cuttings are spread at the base of each plant as a mulch to reduce evaporation. 

=== Drip adjustment ===

To begin the season, a glass was placed under a dripper and left to run for 1 hour and adjusted until 100ml dripped per hour. All plants were set to a similar drip rate and allowed to run. During the summer we experimented with more or less water per plant and although we found it difficult to always have the same drop rates, but no records were kept since it was mainly to ensure that the system would work as expected. In hot, sunny times more water was released, but without sensors in the earth it's difficult to know what amount is correct. The system was never turned off, meaning it dripped 24 hours per day, but very slowly.

=== Plants ===

16 Tomato
10 Paprika
Various others including Eggplant, Cucumber, Green Beans, salad, herbs and spices.

=== Big garden ===

Multiple basic gardens share the same water source for an economical way to feed entire villages.

[[File:Drip garden multiplied.svg|thumb|center|Multiple gardens share water]]

== Problems to solve ==

The manual cleaning of drippers must be eliminated. It's the main drawback to this system. After 3 weeks they begin clogging and cleaning helps, but it's difficult to leave the system alone for more than a few days.
Homemade replacement parts to reduce cost!
Moisture sensors in the ground would give a more accurate measure of whether each plant gets enough water.

We'd like to solve this by putting a tiny motor on top of a spike at each plant and let the drip fall onto the ends of 2 wires, the computer could read the short circuit as a drop, thus enable real automation by adjusting the pressure on the hose to regulate the drop count.

== Conclusion ==

This system runs well with little supervision, but the beginning takes time since too much or too little water can be bad. Automation would allow a hands free garden and is the prefered solution, if it can be done cheaply enough to feed the masses with little attention.

== Our challenge to you! ==

This project is simple to recreate inexpensively, do it with recycled plastic and we'll have provided a relief of malnutrition.

* Here are a few examples
** eliminate the 4 corners!
** replace the 30 reducers and drippers with 3d printed from recycled plastic or find your own solution.
** find a way to recycle plastic, PET is the most obvious choice
** improve or make a better filter to eliminate clogging of drippers
** change the mechanical dripper which easily clogs with a simple, inexpensive alternative
** how do you collect and store enough water to best get through the dry season in various climates?
** make a manual pump which could be reproduced anywhere
** use your imagination, the answers lie within you

Most importantly of all! It must be so simple, any child could run it. There must be at least 1000 ways, please help us find them.

=== You're welcome to take our simple, yet expensive version and put it to shame, by ===

* simply find a solution that works better:
** cheaply mass producible
** automate it, make the dripper clog free
** eliminate or improve the filter
** bring the price per plant to below $1.00
** keep it simple enough that even a child can use it

=== Where would we begin? ===

* Recycled plastic, we must find a way to use what's choking our waterways and killing our oceans.
* 3d printed parts to eliminate cost
* An electrified dripper, could be a stepper motor or anything else. How about man made muscle?
** Stepper motors could be taken from outdated CD/DVD drives
* Networking, cables or IoT
* Computer, I'd begin with Rasp Pi, but cost and power must be considered.
** Linux because it's free and open
* Produce parts where jobs are needed most to allow multiple benefits from a single solution.
** If we can give the poor work and a way to feed their families we can reduce migration, stop them from leaving home.

== Future plans ==

See [[{{FULLPAGENAME}}/Future plans]].

== External links ==

* [http://globalgoalsclub.weebly.com The Global Goals club web site]
* [https://www.facebook.com/GlobalGoalsClub/ Our Facebook page]

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[[Category:Agriculture]]
[[Category:Irrigation]]