Inequality in capacity to adapt to climate change is emerging as a potential force widening disparities in wealth, security and opportunities for human development. While developed countries with adequate resources are in the process of adapting to climate change, it is the countries in the developing world that are facing extreme and more immediate burdens and adverse impacts of changes in global climate. According to research, developing countries in tropical and subtropical regions will face some of the strongest negative consequences of climate change, thus primarily and adversely impacting the most vulnerable people globally (International Resource Group, 2008).

Flood is unusual accumulation of water. A disaster might be caused by a natural or man-made phenomenon resulting in a significant physical damage or destruction, loss of life or drastic change to the environment. It is a terrible occurrence that is capable of being harmful to life, property, economic and social welfare of people (Cherdpong and Thiengkamol, 2013). The coastal plains or flood belt are often more vulnerable to flood disaster in Delta State. With the advent of climate change phenomenon, the effect of floods has been devastating in the flood belt of Delta State, Nigeria. The 2012 flood disaster in some parts of Nigeria, including Delta State is a case worthy of reference.

The dimensions of the effect of flood can broadly be grouped into direct and indirect. Social effect of flood may manifest in the forms of loss of homes, loss of social status, education of children/wards and psychological trauma of the victims. Other direct effects are loss of farm income, social infrastructures (schools, markets, roads, and health facilities), loss of means of livelihood, loss of farm lands and crops/livestock's. Indirect effects of flood may reflect in the form of burden on safe communities in the hinterland and food shortages, increase in prices of food stuff. Other dimensions of effects of flood disaster include: food insecurity, poverty, psychological trauma, loss of human capital, political unrest and a drain on government budget (Cherdpong and Thiengkamol, 2013).

The overall effect of flood disaster is that it retards and reverses development. It may hinder productive investment. A key issue for developing countries including Nigeria is the lack of capacity of farming households to mitigate flood disaster (Abaje and Giwa, 2007).

The smallholder farmers that dominate the population of Delta State, produce small output, with scanty resources, earn low income and low purchasing power. About 70% of the whole population depends on their aggregate output. According to Cruz (2010) majority (more than 80%) of the small holder farmers in the world depend on farming as their primary source of livelihoods. Three out of every four poor people leave in rural areas and depend on agriculture, either directly or indirectly for their livelihood (World Bank, 2008). Consequently, flood hazards on farming households will have spillover effect on those that depend on them.

In most parts of the world, and particularly in the developing countries such as Nigeria, food security and its related issues are vital welfare issues that occupy central focus in global economic debates. Attainment of food security is core problem confronting rural farming households due to low productivity. The changing climate pattern and its effect on agriculture pose a serious food security and livelihood challenges to the rural farm families in Delta State, Nigeria. The United Nations estimate has projected that over the next 20 years the demand for food will increase astronomically. Ash, et al. (2007) reported that yields from Africa's rain-fed farm production may decrease by 50% due to climate change hazards such as flood, by 2020.

Previous studies demonstrating correlations between flood hazards and poverty status among vulnerable rural farm families have generated considerable interest (Meza et al, 2008). The body of literature has accordingly pursued three main directions with respect to climate hazards and livelihood status of vulnerable rural farm families:

* close link between flood and farm output (Meinke and Stone, 2005)

* vulnerability of rural communities, which lack economic resources and capacity to mitigate flood hazards, and

* the need for agronomic

and economic models that can capture relevant variables for adaptation policies and practices (Maza, et al, 2008).

Agronomic and economic models of flood hazards indicate that, over time, adaptive use of seasonal climate forecast could provide some benefits (Ash, et al. 2007), especially with respect to vulnerable farmers (Letson et al, 2005). Hansen et al. (2009) demonstrated that high value could be attained from accurate predictability of flood hazards.

The main purpose of estimating flood response model is to integrate the relevant variables in flood hazards management decision making. It is important to investigate how vulnerable rural farm families and others in the flood belt make use of flood hazards forecast information in their livelihood decision making (Roncoli, 2006).