The success of this thesis can be succeeded by the attentive support from Assistant Professor Dr. Raywadee Roachanakanan who is the major advisor and Associate Professor Dr. Nathsuda Pumijumnong, co-advisor who are the faculty members of Faculty of environment and resource studies, Mahidol University. Thanks for the invaluable advice and guidance helped me in all the time of research and writing of this thesis accomplishment.
I would also like to thank the 17 experts for their kindness in the validation survey for this research. Thanks also go to all the stakeholders in research. I am particularly grateful for the assistance given by people involved in research.
I would like to thank my best friend for their support and encouragement throughout my study.
I am grateful to all the lectures and staff of the Faculty of Environment and Resource Studies for to help, encouragement and technical support.
Finally, I am grateful to my parents for their love, support and encouragement throughout the period of this research