Main Article Content
Problems of watersheds especially, water quantity-related problems are the lack of water in dry season, flood in wet season, low water quality standard and inconsistent stream-flow throughout the year.
Land use in Petchaburi watershed which does not comply with the cabinet resolution on watershed classifications in the West, the Central region and Pasak watershed in 1995 (B.E. 2538) resulted in changes of the use of land during the past 20 years (1987 – 2017 (B.E. 2530-2560). It was found that 9 percent of the forest land in Petchaburi watershed has been decreased while 2 percent of agricultural land, urban and built-up land, water body and other use of land and 3 percent of miscellaneous land have been increased. In order to discover causes of changes in land use, this study has been conducted. The results of the study show that government projects which do not comply with the cabinet resolutions are one of the causes triggering the change of land use in that area. Basically, government projects have to be approved by the cabinet resolution. However, 7 out of 20 projects do not comply with land use measures according to the cabinet resolution on watershed classification namely, reservoir construction projects, the project to use land outside reserved forest as agricultural land, highway construction project, land transfer to temple and mining project. Such projects trigger change of land use in the surrounding areas and affects watershed functions.
Office of Natural Resources and Environmental Policy and Planning. (2013). The Project Increase Performance Management
of Area Watershed 1 (Watershed west and central). Bangkok: Mr. Copy (Thailand) Co., Ltd.
Office of Natural Resources and Environmental Policy and Planning. (2015). Cabinet Resolution Regarding Watershed Class Designation and Land Use in The Watershed Area. Bangkok: B.V. Offset Ltd.,Part.
Parvaiz A. Bhat , Mifta ul Shafiq , Abaas A. Mir , Pervez Ahmed. (2017). Urban sprawl and its impact on landuse/land cover dynamics of Dehradun City, India. International Journal of Sustainable Built Environment, 6, 513–521
Phetchaburi Agricultural Extension Office, Department of Agricultural Extension, Ministry of Agriculture and
Cooperatives. District Level Agricultural Information (District / Village Information). October 18, 2018 , from https://www.phetchaburi.doae.go.th/Data_For_Web/data.html
Pobporn Ratanasuwan. (2013). Study Land use Change on The Phetchaburi basin. Bangkok: Watershed Conservation and Managemrnt office, Department of National Parks, Wildlife and Plant Conservation.
Sananda Kundu, Deepak Khare, Arun Mondal. (2017). Past, present and future land use changes and their impact on water balance. Journal of Environmental Management, 197, 582-596
Srilert Chotpantarat. (2002). The effect of land use change on floods in Phetchaburi river basin. Bangkok: Chulalongkorn
The Bureau of Registration Administration, Department of Provincial Administration. Population and House Statistics
Report. August 1, 2018, Registration statistics system from https://stat.bora.dopa.go.th/ stat/statnew/statTDD/
The Secretariat of The Cabinet. Search for Cabinet Resolution Data (1958 - present). March 5, 2018 , The Secretariat of
The Cabinet from https://www.cabinet.soc.go.th/soc/Program2-1.jsp?menu=1