09 Aug 2009 |
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MITIGATING LAKE NYOS FLOOD THREAT
Adeola Aderoumu’s article titled “Before 70,000 Nigerians Perish Overnight..! published on the Nigeria Village Square(NVS) on July 15, 2009 and appeared in nigerianmuse.com, with comments from NVS Villagers, raises some fundamental questions about emergency management in Nigeria, especially the state of preparedness for a possible catastrophe in the event of a break of the structurally weak volcanic Lake Nyos situated upstream along the Cameroon line of volcanic activity. But first, let me thank the author and all those who have participated in the subsequent discussion on this disaster management issue for their level of awareness and patriotism, especially on the NVS which one of my officers always alert me to the debates on the forum. Disaster management, after all, is everybody’s business and its success depends largely on collaboration between all tiers of government – Federal, state and local governments, a multitude of agencies and services, non-governmental organizations, volunteers, etc. Mr Aderoumu asked the following questions:
Rather than providing answer to each question, let me give some facts about Lake Nyos and the threat to lives and property and measures put in place to mitigate the impending disaster. I believe this will better inform and educate the readers on Lake Nyos and related issues. Lake Nyos is situated on the Cameroon Mountain at an elevation higher than the adjoining Benue and Katsina-Ala plains in Nigeria. The lake flows into the tributaries from which the Katsina –Ala River takes its source, crossing the Nigeria-Cameroon border at a point 108 kilometers from Nyos. The river then proceeds north- westerly into Benue River at a point 40 kilometers east of Makurdi, Benue State. The major threat to Nigeria is in the highly unstable upper parts of the lake body which holds about 50 million cubic meters of water. An analysis of Lake Nyos dam-break reported by WADASCO (1990) shows that “the flood produced will reach about 19000m2/s at the dam site corresponding to a flow depth of over 18 meters. Due to the attenuation of the wave, the flood peak will be reduced to 400 m3/s and flow depth of 14.5meters at the Nigeria-Cameroon border, 250 m3/s and 8.8meters at Kashimbilla and 2000 m3/s and 4.5 meters at Katsina-Ala town. “As the flood enters Nigeria, it spreads over wide flood plains inundating many towns, villages, hamlets and farm lands. Between Cameroon border and River Benue, it is estimated that over 50 settlements including Katsina-Ala, Kashimbilla, Waya, Manga, Gamovo and over 15,000 hectares of land will be flooded. Over 35,000 people and 20,000 herds of cattle and other livestock will be caught within the flood part and could perish.” As a result of this alert the National Emergency Management Agency conducted some studies and developed various counter measures classified under Absorption, Mitigation, and Elimination depending on the location. Absorption measures involve the preparation of the threatened areas to absorb the initial effects of the event. They include: *Prediction of the Lake Nyos Dam-break and flood arrival time. *Flood inundation mapping. *Emergency preparedness planning. *Containment of flood by a buffer dam. Mitigation measures in the plan include: *Reinforcement of the Lake Nyos dam. *Control of the dam seepage. *Control of potential rock- fall into the lake. *Venting of gas from the lake bottom. Elimination measures were aimed at removing altogether the danger posed by the lake such as: *Draining of the lake. *Degassing the lake. *Removing the lake. I should mention, at this juncture, that there is also an inter-ministerial committee – the Technical Committee on Earthquake Phenomena (NTCEP) coordinated by the Federal Ministry of Science and Technology of which NEMA is a member. This committee is also actively involved in efforts to forestall a Lake Nyos disaster through its subcommittee. Other members of the committee are:
It is worthy of mention that on Friday January 6, 2006, President Olusegun Obasanjo called an emergency meeting of governors of the frontline states of Adamawa, Akwa-Ibom, Cross River, Taraba, Benue, Kogi and ministers of Agriculture, Finance, Water Resources and Director General of NEMA, to discuss the threat of Lake Nyos to Nigeria. The President approved of the proactive precautionary measures within Nigeria which included the construction of a buffer dam. The Federal Executive Council approved the award of the construction of the Kashimbilla Multipurpose Dam across Katsina Ala River at about 10 kilometer upstream of Kashimbilla village in Taraba State to Messrs SCC Nig Ltd on April 26, 2007 at a cost of N42,935,713,770.54 (Forty two billion, nine hundred and thirty five million, seven hundred and thirteen thousand, seven hundred and seventy naira, fifty four kobo)with the completion time of three years. NEMA is in constant touch with the Federal Ministry of Water Resources which is handling the dam project and is convinced that everything possible is being done within the limited resources available to government to execute it. The Kashimbilla/Gamovo Dam provides a classical example of the strong link between disaster management and national development. Apart from the main dam, the contract works include:
The Agency, in collaboration with stakeholders has continually reviewed the state of preparedness to address major disasters including the threat of Lake Nyos and other challenges induced by the changing climatic and hydro-ecological factors. Among the frontline states, Benue is the most exposed to the Lake Nyos disaster risk. Twelve local government areas are vulnerable. Gladly too, the state government has been very active in preparedness and mitigation planning. As a result of an independent study of the risks and vulnerability of the people, the government has identified high ground communities, schools, places of worship, etc for rapid evacuation of the most-at-risk population in the event of the dam-break. As part of NEMA’s regular efforts to prepare for and mitigate Lake Nyos disaster, a meeting of the frontline states is again scheduled to hold in August, 2009. This type of meeting and the frequent fact-finding visits of the technical committee of (NTCEP) to the frontline states, amongst others, ensure that the threat of Lake Nyos is constantly on the front burner. It is pertinent to mention that in collaboration with our stakeholders, the Agency has, in September, 2008, put in place a Search and Rescue and Epidemic Evacuation Plan (SAREEP) for Nigeria. The plan covers flood and eight other disasters – aviation disasters within and outside the airports, maritime based disasters, fire disasters, collapsed building, road accidents, rail disaster, oil pipeline explosion and epidemic evacuation. The plan spells out the specific functions and responsibilities of different government agencies/organizations and NGOs during search and rescue operations. In the case of flood disaster the Fire Services and the Nigeria Security and Civil Defence Corps will lead the operation. The Police, medical services, Federal Road Safety Corps, private organizations like the Red Cross, the Disaster Reaction Units of the military have assigned roles in the emergency response. With a good early warning system in place and given the projected arrival time of eight hours of the resultant flood from Lake Nyos dam-break at the Cameroon-Nigeria border, it is expected that our collective response plans would be adequate to avert a major calamity. I observed that all of Adeola Aderounmu’s questions were directed to NEMA. This exposes a basic flaw in disaster management. All over the world, for strategic and tactical reasons, the first responders to a disaster – whether natural or human induced, no matter the gravity of such incident, are disaster managers in the locality. The simple reason is that since disaster happens suddenly and for most times without warning, disaster managers in the locality of the incident should deploy their services spontaneously to bring succor to the victims. This is what response and resilience are all about. The Act establishing NEMA envisaged the existence of a State Emergency Management Committee (SEMA) in each state of the Federation, operating with some level of autonomy. Through a scheme initiated by NEMA to take disaster management to the grass-roots, the Agency is partnering with local government councils to train at least 200 volunteers in each local government in basic disaster management skills. Those trained and local council officials should constitute the first line of defence against disasters. While they provide this initial response, the State Emergency Management Committee may seek federal assistance from NEMA, which for logistical reasons may take some time to get to a remote scene of a disaster. I want to challenge concerned Nigerians like members of the NVS to sensitize their state and local governments to establish their disaster management outfits to compliment what NEMA is doing at the center for a more effective emergency service delivery in the country. Believe me, dear villagers, the management of NEMA is determined and eager to put disaster management on a sound footing, for the sake of the distressed, and with your cooperation the task will be a lot easier. I thank you all for believing in Nigeria and for proffering constructive criticisms that would ensure that government institutions at all levels discharge their mandates diligently and professionally to satisfy the yearning of the public. Thanking you for the interactive and educative platform. AVM Mohammed AUDU-BIDA (rtd) Director-General, National Emergency Management Agency (NEMA) References Before 70 000 Nigerians Perish Overnight..!By Adeola Aderounmu Re: Before 70 000 Nigerians Perish Overnight..! By Yushau Shuaib
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By AVM Mohammed Audu-Bida (Rtd), DG NEMA 

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