Abstract
A study of flood flow pattern in floodplain of a large river in the natural groundwater recharge area during flood period from 2001 to 2002 is presented. The floodplain of the Yom River in Phichit Province, Thailand, was carried out during flood period 2001 and 2002. Some phenomenon in hydrological processes especially runoff, infiltration and flood flow patterns has been studied. Field experiments for infiltration testing by using ring-infiltrometers were carried out corresponding recorded time and water depth. Laboratory testing was done for studying some properties of soil samples especially for infiltration speed through soil column, which were collected from the field. Due to the site of study is located in ungauged catchments with lack of for hydrological data but some had been generated using available data from other catchments nearby the site. The simple water balance model was applied to this study. Mapping represents flood flow patterns and distribution of infiltration rates. The results showed the potential for further study of flood reduction via deep percolation from floodplain.
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