August 31, 2012
RAINWATER Harvesting (RWH) has been a practiced since time in memorial. It has, however, been practiced at different levels- domestic and agricultural use, which are referred to as the blue and green water use respectively.
However, Zambia Rainwater Harvesting Association (ZRHA) Secretary General Bob Muzyamba says the scale of utilization of RWH in Zambia’ leaves a lot to be desired’. “Since 1998, Zambia has been involved in many meetings, workshops, collaborations and protocols relating to RWH in the SADC (Southern African Development Community) region to respond to the effects of the drought hitting the region.
The Ministry of Agriculture together with the Ministry of Local Government and Housing as well as the Ministry of Energy and Water Development were engaged by the Zambia Rainwater Harvesting Association to explore ways of enhancing the utilization of RWH as an appropriate technology for the effective use of water as a resource,” said Muzyamba.
Zambia has been experience erratic rain fall partners for the past 10 years which have affected the predictability of the rain pattern and planning.
Muzyamba says the association has tried to align itself with Government policy to ensure that the knowledge and skills reposed in it can be recognized and utilized. “There is a huge potential of Rainwater Harvesting in Zambia in all regions or zones. The potential is in flood control and drought control on one part, and water conservation on the other part,” he said.
Muzyamba is also acting president of the association following the demise of the incumbent, Joyce Musiwa, in line with the organization’s constitution.
The level of activity in rainwater harvesting in Zambia is very low and isolated, the commonest type being the traditional one where families draw water falling from roof tops in drums of 200-210 liters capacity for short term use. The families usually do this without realizing that they are actually practicing rain water harvesting. In its formal state, the technology is quite novel though it has existed for a longtime. A typical formal system involves the use of gutters on buildings like schools and hospitals.
Though its downside is limited application, institutional rainwater harvesting is quite effective. While the collection of rainwater by a single household may not be significant, the impact of thousand or even millions of household rainwater storage tanks can be enormous.
The frequency of droughts in recent years and the resultant problem of food insecurity therefore provide an imperative for scaling up rainwater harvesting in Zambia.