Noppol Arunrat. Coastal erosion related to hydro-meteorological regimes at Pak Phanang Bay Nakhon Si Thammarat province. Master's Degree(Technology of Environmental Management). Mahidol University. : Mahidol University, 2008.
Coastal erosion related to hydro-meteorological regimes at Pak Phanang Bay Nakhon Si Thammarat province
Abstract:
This study aimed to examine the relationship between coastal erosion at Pak
Phanang Bay in Nakhon Si Thamarat Province and hydro-meteorological regimes by
using secondary data and satellite images. LANDSAT-5 TM from the years 1990,
1998 and 2007 were used to monitor shoreline changes. The rate of change was
evaluated by using the overlaying technique. The prioritizations of the eroded areas
were classified based on Multiple Criteria Analysis (MCA). There were 5 factors that
were used in the MCA technique: (1) rate of coastal erosion; (2) land use and
environmental values; (3) existing coastal protective measures; (4) minimum
economic loss values; and (5) attentiveness in the mitigation and adaptation.
The results of the study suggest that hydro-meteorology regimes have
prevailing tendency to increase and become more severe every year. The highest
amount of coastal erosion happens during the northeast monsoon period. Shoreline
erosion could be prioritized into 9 areas according to their severity. The most critical
erosion shorelines are: Ban Kong Khong, Ban Hua Tanon Chaitalay, Ban Plai Sai,
Ban Laem Talumphuk, Ban Noen Num Hak, Ban Na Kot, Ban Kho Pai, Ban Nam
Sap and Ban Bo Khon Thi respectively. To avoid a coastal erosion impact, villagers
could simply move away from these areas. Based on these results, reducing or
mitigating coastal erosion could be done in two periods. In the short term, changes in
lifestyles such as building codes in the vulnerability zones. The elements used to
elevate the buildings are bricks, concrete. Therefore, encouragement of integrated
management system, local wisdom and promotion of public participation in coastal
resource planning are strongly recommended. In the long term, since coastal erosion
might be affected by a rise in sea level due to global warming, re-establishing natural
environmental features in the areas for seashore stability is recommended.