1.7 THE STUDY AREA
Anambra State is located in the south-eastern part of Nigeria. It is the most popular south-eastern states in Nigeria due to its location and positioning, as it connects all other south-eastern states. When approaching it from the south-west, it is connected with the most famous bridge in the country i.e. (the Niger bridge). Anambra State is also noted for its politically and commercial endowment, as she produced the first Nigerian democratically elected president, Dr. Nnamdi Azikiwe, after its independence in 1960. She also has the largest market in west Africa i.e. (Onitsha Main Market).
Anambra lies within the tropical rainforest belt of Nigeria. Like some other states of Nigeria, Anambra climate is characterized by two distinct seasons, namely dry and rainy seasons. The dry season lasts from November to March while raining season lasts from May to October. The average annual rainfall ranges from 1500mm to 2200mm with July as the rainiest month. Its humidity is relatively high between 65.80 percent throughout the year and characterized by daily temperature of up to 250C
– 270C (Ogunoh, 2005).
The North East Trade wind which blows across the Sahara Desert during the months of November to January causes the dust, dry and short cold seasons known as Harmattan. On the other hand, the shift of the position of the surface further North as a result of moving air masses from the Atlantic Ocean North-wards causes the rainy season. The sun’s movement from East to West shifts very slightly to the South and North. Thus, North and South facades receive little direct sun light while East and West are directly exposed to sunrays (Ogunoh, 2005).
Vegetation Characteristics
The vegetation of Anambra State is semi-rainforest with tall trees and tick bushes. This is as a result of the combined effects of temperature, humidity and rainfall, but particularly the variations which occur in the rainfall (Ogunoh, 2005).