|

|
|
UNDP
Africa 2000 Plus Network officer, Osmond Mugweni shows how water harvesting can help retain moisture |
The
subsistence Zimbabwean farmer, Zephaniah Phiri, introduced this method to Zimbabwe in the late
1960s; and as happens with all new things, the authorities in colonial Zimbabwe arrested him for
introducing a method the success of which they doubted. But the arrest did not stop Phiri from
continuing to implement the method on his small rural farm in Zvishavane. Today, Phiri, now in his
late 70s, is emerging as the hero that he was when he first introduced this method. Phiri has proved
wrong people who doubted the effectiveness of this method, because it promotes food security. It
also generates more income for farmers from sales of a variety of crops that they can now harvest
throughout the year from the same piece of land, resulting in a better standard of living.
Mrs.
Khetiwe Mhlanga, UNDP Africa 2000 Plus Network Coordinator said, “We have known about Mr.
Phiri’s work for years. Mr. Phiri also read about the UNDP Africa 2000 Plus Network’s work and
wrote to us. That’s how we came to know him.”
Commenting
on why Zimbabwe’s Agricultural Extension
Services was not using Mr. Phiri’s water harvesting method as a solution to fight drought and
promote greater yield from agricultural products countrywide, Mrs. Mhlanga said, “The Agricultural
Extension Services, like most governments, don’t learn from common people. Even in Japan
at the World Water Forum, government people didn’t go see work done by NGOs and community
representatives.”
However,
Mrs. Mhlanga said the water harvesting method is spreading steadily on small-scale farms in
Zimbabwe, but using a method that is slightly different from that of Phiri, who has been harvesting
water on sloppy land.
Meanwhile,
most SHAFAC members who have implemented the water harvesting method on their small scale commercial
farms said in separate interviews that five years from now they see themselves owning sophisticated
farming equipment, including tractors, due to revenue generated from the water harvesting method-fed
agricultural produce.
Through
the use of this method, the SHAFAC small-scale commercial farmers await another bumper harvest this
year. The UNDP Africa 2000 Plus Network Global Environment Facility Small Grants Programme (GEFSP)
assisted the farmers to establish the water harvesting method in the year 2000. Funded by
Hilswerk
,
Austria
, the ABC+Water Project is aimed at
restoring the people’s livelihoods in the Shagashe farming area, through ecologically sustainable
agriculture.
While
the water harvesting technology has helped SHAFAC to beat the negative impacts of drought, large and
small scale commercial farmers and subsistence farmers in
Zimbabwe
have once again succumbed to another
drought this year, leaving the country with inadequate food supplies. Sadly, the method that could
provide answers to
Zimbabwe
’s food security problems in dry regions
and in times of drought has taken time to take off the ground. The UNDP Africa 2000 Plus Network is
working towards promoting the use of this technology throughout
Zimbabwe
and globally.
The
UNDP Africa 2000 Plus Network showcased this technology through photographic posters at the World
Water Forum in
Kyoto
,
Japan
last March to benefit countries whose food
supplies continue to lessen as long as the drought persists.
Mrs.
Mhlanga said the response to their water harvesting campaign in
Kyoto
is yet to come. She also presented a paper
on capacity building at the World Water Forum.
The
Installation Process
To
install this method on one’s farm, all one needs to do is to dig filtration pits not more than a
meter deep and a meter wide and the length can be as long as 1-30 meters at the top of the field so
that the harvested rain water can filter through into the fields with crops. SHAFAC farmers say the
installation of the water harvesting technology is very cheap.
When
it rains, the water harvesting filtration pits hold the water and prevent run-off. The water
harvesting filtration pits give the rainwater good contact time with the soil and allow it to sink
into the soil and not to be lost as run-off. An added advantage of this method is that it also
minimizes soil erosion, thereby promoting sustainable agriculture. The water harvesting filtration
pits raise the water table because they allow water to filter into the soil. When the water table is
rising, it also initiates some capillary action, drawing moisture from deep down underground to come
to the surface. “This is a double cumulative effect that is very good for the environment,” said
Mr. Mugweni. “The wet conditions result in grass and many plant species growing lavishly on the
farm, serving as a good conservation measure. In wetland areas you get a lot of the water-loving
plants coming in the area, in addition to animals and insects.”
|

|
|
A rich maize crop on a farm where
water-harvesting technology has been installed |
Zimbabwean
Farmers Optimistic About Food Security
Mr.
Mugweni says this method serves as a food security measure in drier parts and even in the wetter
parts of Zimbabwe in times of drought.
Before the introduction of the water harvesting method in the Shagashi farming area, farmers used to
struggle to produce just one crop in one season, but they can now produce more than one crop in one
season on the same piece of land. In summer they grow maize and in winter they grow wheat, using the
moisture retained by the water harvesting filtration pits. The water harvesting ponds can also be
used for fish farming. This allows for diversification in farming, thereby creating food security.
Mr.
Mugweni said the water harvesting filtration pits help reduce soil erosion by preventing surface
run-off, since they hold water and make it sink into the ground. Farmers are also able to get
increased soil depth because they are not eroding the soil. They will also continue farming on the
same pieces of land. As long as they do not cause soil erosion they will not need to abandon their
pieces of land in the future in search for virgin land that is difficult to find, due to continued
population growth.
The
problem in Zimbabwe is not that of total
rainfall failure. “Our problem is the distribution of rainfall. In most dry parts of Zimbabwe, all
the rainfall for the season can come in just one or two months and it is not spread across the whole
rainfall season,” said Mugweni. In such areas, if you have water harvesting structures like those
being done here in Shagashi, you harness all that moisture and that time and then you spread it over
the next four to five months and that’s how it enhances the productivity in these semi-arid
environments. In the process, it promotes food security in dry parts of the country and even in
wetter parts at times of drought. “Most of the crops grown in Zimbabwe need 90 to 160 days to
fully mature. So if you have the rains coming in less than one month, the crops cannot mature at
all,” explained Mugweni. “But if you spread that moisture and use it for the next three to four
months, you will be able to harvest crops.”
What
the water harvesting method has demonstrated
is that farmers can have fertilizers, insecticides and herbicides, but without adequate water they
cannot get a good harvest. This is a good demonstration of how an indigenous knowledge system
compliments modern methods of agriculture. Also, because the area is generally dry, agronomists
discouraged farmers in the Shagashe from drilling boreholes, as this would lead to the creation of a
desert. But through the water retention capacity of the water harvesting method on their farms, they
have now created wet environments. Because of this, farmers in this area are now being allowed to
drill boreholes on their farms.
The
wet environments are helping revive wetlands, promoting rapid growth of grass, trees and even
attracting wildlife onto their farms. Although wildlife destroys farmers’ crops, its attraction to
the wet environments demonstrates that apart from promoting food security, water harvesting also
promotes biodiversity conservation.
Emmanuel
Koro is a Zimbabwean journalist based in Harare. He studied environmental communication at the
University of Maryland and is a regular writer for the World Bank's Development Outreach Magazine. He is currently
working as the Research Writer/ Communications Officer for the Africa Resources Trust, in addition to being the President of the Sub-Saharan
Africa Forum for Environment Communicators (SAFE), which promotes the views of African rural communities in the media.