Mike Freshney of the Read more [...]
Place Category: Resiliencia ante desastres
Gregory Park has embarked on its third micro project to erect a partition wall in the grade three (3) classroom at Gregory Park Primary School. This class room is used as a multi-purpose room for the community.
From the inception of the BRACED Project, the Gregory Park Primary School has been used as the meeting place for the PASSA Work Shops, PASSA closes out fair and weekly meetings. The grade 3 class room is also used as a shelter for pending hazard that affects the country.
The class room itself was a hazard to the student’s staff as the partition was in disrepair and rodent infested. As a result, the Gregory Park Council decided that it should be one of their Micro Project.
Gregory Park has a population of 15,834 persons, with a high population density of 3,752.27 people per sq km within the 4.2 sqr km area community. One of Jamaica’s major rivers, the Rio Cobre runs outside the northern border. Due to the streaming order of the neighboring river network and potential extreme rainfall events, the majority (81%) of the community is susceptible to river flooding.
Some 3,162 buildings would be impacted by this flood. There is a high likelihood of flood events, as over 10 extreme floods have occurred within the community.
BACKGROUND OF GREGORY PARK
Located within the parish of St. Catherine, along with the southern part of Jamaica.
The settlements within Gregory Park are sparsely distributed within the centre of the community,
Situated along the tertiary (Class C) road network. There is a significant population of 15,834 persons, with a high population density of 3,752.27 people per sq km within the 4.2 sq km area community. The poverty level is estimated at around 10.44% of the population. The elevation of the coastal community is relatively low, recorded as 15.24 metres.
Gregory Park is categorized according to two main land-uses. Plantation (i.e. tree crops, shrub crops, sugar cane and banana) are currently situated along the western border and northern region of the community. The remaining land (approximately 50%) is categorized as an urban/industrial area where the majority of the buildings are concentrated. The total number of buildings within the community is 3,894, densely distributed along the tertiary (Class C) road network, following the general observed trend..
HYDROGEOLOGY AND FLOODING RISKS
The overall geology formation of the area is observed and recorded as non-limestone, with the entire geology comprising of alluvium. The community falls within the Rio Cobre watershed and the basic hydrostratigraphy consists of Alluvium Aquifer. The mean rainfall recorded within the community is 858.61 mm/year; with a maximum recorded value of 890.95 mm/year. There have been a total number of 5 historical landslides that have occurred prior to 2012, typically within the northern districts of the community.
The flood map of Gregory Park indicates that the community (eastern region) is susceptible to the potential threat of sea-level rise, specifically a 5 and 10 m increase. Approximately 43 buildings would be impacted by a 5m surge and potentially 925 buildings (23.75%) would be susceptible to a 10m surge. See Figure 25.
One of Jamaica’s major rivers, the Rio Cobre runs outside the northern border of
Gregory Park, within the surrounding community of Caymanas. Limited tributaries fall within Gregory Park; however, due to the stream order value of the neighbouring river network and potential extreme rainfall events, the majority (81%) of the community is susceptible to riverine flooding. Approximately 3,162 buildings would be impacted by this flood occurrence. As the terrain is relatively flat, there is high likelihood of flood events to occur, as over 10 extreme floods have occurred within the community, historically. Majority of the historical flood events have occurred along the eastern region of the Gregory Park, with an approximate flood percentage of 79.97%.
The main hazards affecting the community is high wind speeds (rank 5), along with the imminent threat of coastal inundation (rank 5). In-land (riverine) flooding (rank 4) is the third most impacting hazard within Gregory Park, followed by intense rainfall (rank 1) and the unlikely event of landslides (rank 0). As such,
the total multi-hazard score was recorded as 15.
The existing infrastructure that would be directly threatened by the number of impacting hazards are ranked according to the exposure values, which are: Buildings by POI’s (Score of 2), Population Density (Ranked Score of 8) and Poverty (Ranked score of 1). The multi-hazard and exposure scores combine to form an overall vulnerability score of 165.