H2o Assignment 2

Water pollution in Kenya. The Kenyan context is awash with examples of water pollution. Amongst the myriad of these are the maritime (sea water) pollution at the Kenyan coast which is chiefly due to the danger posed by ocean bound vessels that ferry oil loads to the Mombasa port. There have been incidents of oil spills in the ocean in the past with devastating consequences and raising eye brows. The fact that of the spatial economies effluents from industries to sewer networks that are not treated end up at the sea is another example of water pollution in the Kenyan coast. Within the coast waters context, there is the pollution that arises from the poor disposal of non-biodegradable substances e.g. plastics, nylon papers and related flotsam. Up country water pollution has the fresh water systems as the main receptor. For instance, the Nairobi river that crosses through Nairobi city is a major example of water pollution. The river system has been abused by industries that release raw untreated chemical effluents into the river. Again, the culprits are poor industrial products management life cycles e.g. nylon, plastics and related debris find their way into the river system. Cases of sewer lines emptied into the system either due to chain disruptions or sheer negligence are also rife. The other examples in Kenya’s water pollution woes is the continued degradation of the lake Victoria water quality. The use of fertilizers by farmers upstream has led to the gradual but steady eutrophication of the lake a thing that has affected the water quality in the lake. The channeling of untreated sewer into the lake, car washing by the lake side - a practice that releases oil spills into the lake system etc have also served to compound the problem. In the less developed areas of Kenya’s spatial economy, deforestation and poor solid waste management have also brought varying levels of water pollution in these micro-economic areas. E.g. increased deforestation has made surface run-off to increase both in quantity and froth, plastics matter and poor sanitation have become part of the problem. In the light of the above water pollution examples both marine and fresh water system, a number of problems can be identified that are directly associated with 1

the question of pollution. For instance, the increased eutrophication levels in the lake Victoria have created an ideal ground for the flourishment of the water hyacinth. The emergence and consequent resurgence of the hyacinth in the lake Victoria waters has had a damaging impact on the livelihood systems of people adjacent to the lake and jeopardized the lake’s ecosystem. For instance, its scientifically argued that the hyacinth blocks out the suns rays from penetrating into the lake waters thereby upsetting the natural energy supply of below water systems i.e. zoo plankton and phytoplankton that forms the basis of the marine ecosystem. This has led to low fish production at the shore landing points this has not only created an economic problem to the people but has compounded the vicious circle of poverty in the region the hyacinth also hinders the natural churning of the lake waters by surface winds and storms, a thing that naturally adds into oxygen equation of the aquatic ecosystem. The potential repercussions of this scenario are not yet fully comprehended at the moment, but there is evidence that the fish species may be forced to adapt or the process may eventually ignite an ecological/ biological succession by the more adapted species which may be of a lower economic level. The possibility of fish import banns by the traditional markets of the 6billion shillings Lake Victoria fish industry owing to pollution have been felt in the past and the dangers of adaptation on the quality of the fish has not been though by the economic planners but the banns may resurface with this face. Boat riding has also been hindered by this hyacinth problem, thereby not only affecting the fishing trips into the lake but also reducing the potential by the regional development players in creating an alternative livelihood strategy through tourism in the western circuit. As noted earlier, the dangers of a swing in the adaptation and succession regimes within the lakes ecosystem are uncertain and the end product of the process is still any ones guess. The emergence of fresh water snake species that colonies such habitants may be in the cards with undetermined effects. Inland water system pollution has increased the costs of water treatment i.e. the water treatment plants have to employ complex and capital intensive water

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treatment methods in order to deal with the high levels of pollution in the waters. For instance, there is need for chlorination, there is need for coagulation and flocculation, these processes end up pushing the operation costs up thereby discouraging most investors and consequently leading to water poverty. Unlike these polluted water systems, the spring waters that are free from pollution are relatively cheaper in the treatment. Arising from the obvious fact that the waters are increasingly getting polluted from human commissions and omissions, the incidence of water borne diseases are also on the increase with huge management and treatment costs. This scenario has affected Kenya’s placing on the Human Development Index. The economic costs arising from water pollution are yet undetermined, but all pointers indicate that they are great. For instance, arising form the high levels of pollution of the Nairobi river, downstream attempts to tap or utilize the waters of the river are either prohibitively expensive or outrageous. This is because, the domestic or agricultural use is not possible from the water owing to the high levels of pollutants industrial or otherwise. The economic impact of this scenario is yet to be established, but it could a lead factor in Kenya’s water poverty ranking/s. The problem of oil spills is the source of the triple problems of death of aquatic life systems something arrived at by the fact that oil being less denser (approx 0.9g/cm3 ) than sea water (approx 1.9g/cm3 ) means that the oil simply floats on the water surface their by blocking oxygen from penetrating through the waters leading to deaths. Another boomerang effect from the oil spills arises from the fact that, the oil tends to be sticky on the wings of birds that plunge the waters for fish. When the oil sticks on the wings the flight capabilities of these birds are totally crippled leading to either drowning or incapacitation. Oil spills when washed ashore tend to stain the sandy beaches thereby leading to a low value of our beach areas something not healthy to the multibillion tourism sector. The process of restoring oil spill stained coastlines and waters is usually massive and in developing economies like in Kenya where disaster preparedness and hazard handling measures are low, it leads to the diversion of scarce resources affecting

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the economy in the long run. Some, losses that arise form the oil spills are irredeemable e.g. when the oil spills clog up breeding grounds for the sea fauna e.g. the fishes and the turtles. The myriad of problems identified above can be addressed by a number of measures such as a concerted effort to get rid of the hyacinth in the lake Victoria. This can be done through mechanical means (machines) with a research geared towards unearthing better alternatives on the use of the hyacinth e.g. making of compressed charcoal blocks, organic manures and other innovative ways that will put a value tag on the hyacinth thereby removing the entire burden of its removal from the tax payer and shifting the same to entrepreneurs. The other option open is the use of biological (symbiotic) non-risk options to remove the water weed. The rise of the pollution – upstream fertilizer use – needs to be cubed, this can be done by switching to the organic manures thereby reducing the eutrophication levels in the lake. Afforest ration programs upstream will also help in facilitating seepage of the storm waters and restore the natural filtration regimes upstream effectively removing the burden of solvent rich waters from the lake ecosystem. Law enforcement and awareness campaigns notably those touching on the Environmental Management and Coordination Act (EMCA 1999)and inherent processes of Environmental Impact Assessment, Ecological Risk Assessment and product life cycle management are all measures that can be employed in order to arrest, halt and reverse the trends in pollution. Disaster preparedness by the government agencies on potential hazards like oils spills etc need be strengthened. The abuser pays principle needs to be enforced to remove the burden of environmental carelessness payments from the public and instill a sense of responsibility in the corporate world.

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The increasing pollution levels in most of the rivers and water systems in Kenya, need to be addressed through innovative cheap solutions of water treatment e.g.. the use of Ultra-Violent radiation in water treatment or the use of natural and traditional filtration mechanisms.

Copyright© 2008 by Mwalili Samuel Chaku

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