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Rapid industrial, commercial and economic growth in Warri as a result of oil exploration activities has led to a continual increasing urbanization. This promotes flooding with excess rainfall due to the total impervious cover of the area and the unsanitary habit of people dumping refuse into stream channels, drains and also building along the flood pathways. Land cover change for the period 1987, 2002 and 2007of Warri was investigated using satellite remote sensing data. The investigation was necessitated to determine the changes over time and how this changes influence urban flooding in Warri Metropolis Delta State, Nigeria. Landsat images of the study area for the years 1987, 2002, 2007 show that in 1987 total built-up area was 83.15km 2 (16.7%) and by 2007 it was 236.76km (43.7%) this reflect an annual frequency of change of 1.09%. Marginal areas and vegetation were converted to residential areas which increased the total impervious cover of the study area and generally increased the peak runoff. The conversion of marginal areas also reduced the channel capacity thus leading to flooding. Questionnaires were also administered using the stratified and systematic sampling methods to get information on how the respondents perceive the cause of flood in the area, the data generated was subjected to ANOVA statistical tool using SPSS. The correlation matrix between Annual rainfall and frequency of flooding show that at P F crit at P < 0.05 showed that an uncoordinated or unregulated urbanization activities is similar in all the flood zones (Warri 1- Warri 4).

Impacts of Urban Land use changes on flood events in Warri, Delta State Nigeria