Groundwater Exploration For Agricultural Use Using Resistivity Imaging In Peninsular Malaysia
Loading...
Date
2011
Authors
Kadri, Muhammad
Journal Title
Journal ISSN
Volume Title
Publisher
Universiti Sains Malaysia
Abstract
Groundwater is a very important component of water resources. The demand of water increases with increasing population growth. Human activities and industries contribute to pollution of stream and river. In agriculture, efficiency of water use in irrigation in general is low. Irrigation efficiency is in the range of 40 to 50 percent because almost all of the irrigation systems are open systems designed to take advantage of flooding. In this study groundwater is suggested to supplement as an alternative source of water for irrigation. In Malaysia only less than 2% of the present water used is developed from groundwater. 2-D resistivity imaging is used in order to determine the existence of usable groundwater. This method is the most commonly method that been used for groundwater exploration. The groundwater found is used for irrigation purposes. In this study there are five study areas in Peninsular Malaysia for groundwater exploration which are in Johor, Terengganu, Perak, Kedah, and Perlis. Different arrays were employed in the study at different site, for example the array used in Pagoh is Wenner Schlumberger. The array used in Marang and Ipoh are Pole dipole. The arrays used in Pendang are Wenner and Wenner Schlumberger and the site in Chuping the arrays used are Wenner, Wenner Schlumberger and Pole dipole. In Pagoh, the survey site shows the existence of groundwater. It is indicated by the resistivity values about 10 - 100 ohm-m. In general the results show that the subsurface is made up of alluvium and clay and the high resistivity values of more than 1000 ohm-m near the surface is due laterite and the end of the depth can be interpreted as mixture of weathered material or bedrock. In Marang, the survey site shows the existence of groundwater. In general the results show that the subsurface is made up of sand and clay (resistivity value of less 100 ohm-m) and sandstone with resistivity of more than 2000 ohm-m in all the sections.
Description
Keywords
Groundwater is suggested to supplement , alternative source of water for irrigation