Impact of land use changes on water quality in Chanthaburi Watershed, Thailand

Name: Phetdala Xaiyachack

LCSH: Kasetsart University -- Theses. M.S. (Environmental Science) 2021

Classification :.LCCS: TD313.T48

LCSH: Kasetsart University. -- Department of Environmental Science -- Theses

LCSH: Water quality -- Chanthaburi Watershed

LCSH: Land use -- Thailand -- Chanthaburi

LCSH: Watersheds

Abstract: The study was conducted in Chathaburi watershed and the aims of this study was to investigate the spatial of land use change and the impact of land use changes on water quality. Water samples were collected at twelve sampling stations of the watershed, the sampling stations were divided into three groups corresponding to forest-dominated sites (FW), orchard-dominated sites (OW) and urban-dominated sites (UW). Physical, chemical and biological water quality during dry and wet period were analyzed. Change detections of land use land cover (LULC) in Chanthaburi watershed the result of LULC change between 2001-2006, 2006-2010 revealed forest land were increased 22.17 Km2 (1.38%) and 14.99 km2 (0.92%) respectively, whereas between 2010-2016 was decreased 7.02 km2 (0.43%), while 2016-2018 was slightly increased 0.28 Km2 (0.02%). Agricultural land between 2001-2006, and 2006-2010 were decreased 126.46 Km2 (7.83%) and 9.44 km2 (0.58%) respectively. Whereas, between 2010-2016 was increased 18.62 km2 (1.83%), but between 2016-2018 was lightly decreased 2.94 Km2 (0.18%), due to agricultural land was converted to urban land. Urban land between 2001-2006 was increased 26.34 Km2 (1.63%), whereas 2006-2010 urban land was lightly decreased 3.33 km2 (0.21%), while between 2010-2016, and 2016-2018 urban land were continuous increased 6.24 km2 (0.39%) and 6.31 Km2 (0.39%) respectively, due to agricultural land and miscellaneous land were converted to urban land. The results revealed land use land cover change had major effects on stream water quality in Chanthaburi watershed. Our results suggested that urban land use had significant affect water quality in the study area. Turbidity, pH, TS, SS, TDS, DO, BOD, NO3 - -N, NH3-N and PO4 -3 -P parameters showed significant variation on spatial. Contamination of TCB and FCB were high concentration in any land use type becuase of human activities, but showed was not significant difference on spatial. Urban land use had stronger effects on water quality in dry period than in wet period due to the water streams in low flow were more affected by point-source loads. Result also confirmed that stream water quality were polluted due to human activities in urban areas influent. This confirmation was attributed to the values of NO3 - -N, NH3-N, PO4 -3 -P, TCB and FCB which were substantially high from dry to wet period of stream water in urban area.

Kasetsart University. Office of the University Library

Address: Bangkok

Email: tdckulib@ku.ac.th

Name: Onanong Phewnil

Role: Thesis Advisor

Name: Thanit Pattamapitoon

Role: Thesis CO-Advisor

Name: Kittichai Duangmal

Role: Thesis CO-Advisor

Created: 2021

Modified: 2025-07-20

Issued: 2025-07-20

วิทยานิพนธ์/Thesis

application/pdf

URL: https://www.lib.ku.ac.th/KUthesis/2564/phetdala-xai-all.pdf

CallNumber: TD313.T48 .P44

eng

Spatial: Chanthaburi Watershed.

Spatial: Thailand Chanthaburi.

DegreeName: Master of Science

Level: Master's Degree

Descipline: Environmental Science

Grantor: Kasetsart University

©copyrights Kasetsart University

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