Jarupongsakul Thanawat

• PhD
• Professor (Full) at Chulalongkorn University

Seasonal variation in seabed elevation in the muddy intertidal zone of the Chao Phraya River delta, an area of serious coastal erosion for 40 years, was assessed using information on waves and tides predicted by numerical simulations. The study area is under the influence of the Southeast Asian monsoon climate and lies in the innermost part of a sh...

Measurements of thickness and grain size along flow-parallel transects across onshore deposits of the 2004 Indian Ocean tsunami revealed macroscopic horizontal variations and provided new insights into tsunami sedimentation. The tsunami caused severe erosion of beaches, river mouths, and the shallow seafloor along the coast of southwestern Thailand...

Multiple-layered tsunami deposits have been frequently reported from coastal stratigraphic sequences, but the formation processes of these layers remain uncertain. A terrestrial sandy deposit formed by the 2004 Indian Ocean Tsunami was investigated at Ban Nam Kem, southern Thailand. Four internal layers induced by two tsunami waves were identified...

The 2004 Sumatra–Andaman earthquake and the associated Indian Ocean tsunami vastly exceeded the size of their predecessors from the previous two centuries or more. We sought clues on how often large tsunamis occur by taking 9 shallow cores 0.5–2.0 km inland from the modern shore on a Holocene beach-ridge plain of Phra Thong Island, 125 km north of...

This study reveals the three-dimensional morphology and syn-sedimentary formation processes of a deformation structure termed ‘truncated flame structures’ which is found in a terrestrial tsunami deposit in southern Thailand that formed during the 2004 Indian Ocean Tsunami. The structure was found at the boundary between a lower fine-grained layer a...

The landward changes in grain size and thickness of the December 26, 2004 Indian Ocean tsunami deposit on Phra Thong Island and in the Khao Lak Area, south-western Thailand, are summarized in this chapter. The maximum heights of the tsunami on Phra Thong Island and Khao Lak were 7 and 10 m, respectively. The tsunami produced 1–4-m-high erosional sc...

Continental large rivers in Southeast and East Asia, which together supplied ~2.5 x 10 9 t yr-1 (Gigatonnes per year) of suspended sediment in the past, are delivering less than 1 x 10 9 t yr-1 currently because of human activities. In the past, more than 40 km 2 of new land was formed annually by these rivers as delta plains; at present new land f...

Today's Chao Phraya delta naturally differs from that of the past, the delta has continued to change momentarily. This paper would attempt to portray, schematically, the land of the delta in terms of its natural landscape and history of mankind development. From the past 3 decades, the country's development has been concentrated in promoting indust...