Geography Sba

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AIM OF STUDY

The aim of this study is to describe the features found along the course of the Wag Water

River at Golden Spring St. Andrew and Toms River St. Mary and explains how they were

formed.

.

LOCATION OF STUDY AREA

The Wag Water River is located in the parishes of St. Andrew and St. Mary, Jamaica.

The river flows northwards from the hilly interior of Stony Hill and enters the Caribbean Sea

at Annotto Bay St. Mary as shown in figures 1 and 2.

Figure 2: Map Extract, Golden Spring and Environs

KEY
| |Main Road |
| |River |
| |Contours |

.

Figure 2: Map Extract; Tom’s River, St. Mary

KEY
| |Main Road |
| |River |
| |Contours |

.

METHODOLOGY

The information contained in this study was collected on July 10, 2007 during a field exercise conducted along the Wag Water River. Fieldwork began in Golden Spring St. Andrew and continued through to Annotto Bay in St. Mary, Jamaica. Four localities were examined during the field study but only two will be focused on in this project. A topographic base map of scale1: 50,000 was used to plot the field stops and assisted in identifying relief features associated with the river processes. Measurements of the width and depth of the channel were obtained by the use of a measuring tape and a metre ruler. The lengths of some fluvial landforms were also measured in addition to the degree of slope along the valley sides. An analysis of the sediment found in the river channel was done at two of the four localities. The samples were selected at random and for each, the axes were measured using a ruler. Their shapes and types were also established. The velocity of the river was also measured by the use of a float and a stopwatch. This was done at two of the four localities. Further information on river processes and features was collected by the use of textbooks and atlases. Erosional and depositional features within the river valley were identified and named, and diagrams were drawn to show their appearance. Photographs were also taken of these features. Prior to the field exercise textbooks bearing contents on the subject of river processes and features were read and lectures were attended during regular assigned sessions at school.

PRESENTATION AND INTERPRETATION OF DATA

According to R. B. Bunnett (1973), rivers are one of the greatest sculpturing agents at work in the humid regions. They carve out valleys in the highlands and as they do so they produce peaks, ridges and hills. The material that is removed is transported from the highlands and is deposited around them as gently sloping plains. At Golden Spring a variety of features were identified within the river valley. Foremost among these was the steep side of the channel, which stood in sharp contrast to the opposite side, as shown in Figure 3. The valley at this point is asymmetrical with one side sloping at an angle of approximately 80º while the other at about 3º. Valleys of this type are associated with faulting and there is evidence that the river is fault controlled especially in this area, a matter that will be discussed later.

Springs

Exposed Bedrock

Screes

Flood Plain

Direction of
Flow

The rocks which make up the lower section of the scarped valley side were free of

vegetation while the upper region was sufficiently covered with shrubs, tall grass and a few

large trees. The rocks on the steeper side of the channel are largely of igneous origin but have

been metamorphisized through faulting. There were patches of bare soil on some parts of the

upper slopes, which indicated that landslide had recently taken place. Plate...
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