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A delta, which consists of a low-lying area found at the mouth of a river, is an important feature of coastal topographies. In particular, large Asian rivers form huge deltas in South, Southeast, and East Asia. More than 60% of the world population lives in deltas, and more than 80% of the worldΥs total area with rice paddies is in Asia. Deltaic lowlands in Asia are important also to the study of sedimentology and global sediment flux. Rivers in southern Asia and Oceania contribute about 70-80% of the world sediment flux from the land to the ocean. These huge sediment deposits have formed large deltas during the Holocene, and this region is considered the present depocenter in the world.
The purpose of this workshop is to summarize current knowledge of deltas in the East and Southeast Asian region, and to establish networks among Quaternary scientists, sedimentologists, and geological oceanographers for delta studies in this region. Recently, Japanese scientists have had several opportunities to promote international cooperation on delta studies in Asia. This workshop will provide a forum for broader exchange of present knowledge and discussion of future tasks among scientists
T he Geological Survey of Japan has been conducting delta programs since 1996. The foci of these study programs are dynamic sediment processes, sediment facies, sequence stratigraphy, human impacts, and the influence of sea-level rise on large river deltas in Asia: the Huanghe (Yellow River), the Changjiang (Yangtze River), the Zhujiang (Pearl River), the Song Hong (Red River), the Mekong River, and the Chaophraya River deltas. These programs are conducted in cooperation with the Department of Mineral Resources of Thailand, the National Center for Natural Science and Technology, Vietnam, the Institute of Marine Geology, Tongji University, and East China Normal University in China, and other national institutes and universities, together with the National Institute for Environmental Studies and the Geographical Survey Institute in Japan and Niigata University, Nagoya University, and other Japanese universities. These programs are supported by the Global Environmental Research Fund of the Environment Agency of Japan. This third workshop is part of an interim report on our programs.
T his workshop is being held under the auspices of the Active Geological Process Panel of the Geological Society of Japan; the Research Group on Coastal Environment and Morphodynamics of the Association of Japanese Geographers; the Sedimentological Society of Japan; IGCP Project 396: "Continental Shelves in the Quaternary"; IGCP Project 437: "Coastal Environmental Change During Sea-Level Highstands"; IGBP-LOICZ-Japan, and InterMARGINS-Japan.
0930-1000@Opening address & Delta Study Program of the
Geological Survey of Japan
Yoshiki SAITO
1000-1100@Keynote Speech
Survey of World Deltas: Problems in Developing an Accurate Chronostratigraphy
and Measuring Land Motion Relative to Sea Level
Daniel Jean STANLEY (Smithsonian Institution)
1100-1130@Sea-level change
Holocene Sea-Level Change and Glacio-Hydroisostasy
Masao NAKADA and Jun'ichi OKUNO
1130-1200@Deltas in Korea
Depositional Environments of the Han and Imjin Rivers Mouth Deltaic Sedimentary
Body, West Coast of Korea
Geon Hong MIN and Yong Ahn PARK
1200-1330 Lunch
1330-1400
Holocene Evolution of the Huanghe (Yellow River) Delta, China
Yoshiki SAITO
1400-1430
Human Impact on the Yellow River Delta Regime and its Consequences
Zuosheng YANG, Yoshiki SAITO and John D. MILLIMAN
1430-1500
Clay Mineral of the Yangtze Delta, China: To Interpret the Late Quaternary Sea-Level
Fluctuation, Climate Change, and Sediment Provenance
Zhongyuan CHEN and Zhanghua WANG
1500-1520 Coffee break
1520-1550
Sediment Facies and progradation rate of the Changjiang River
Delta, China
Kazuaki HORI, Yoshiki SAITO, Quanhong ZHAO, Xinrong CHENG, Pinxian
WANG, and Congxian LI
1550-1620
Kazumi MATSUOKA, Yoshiki SAITO, Hajime KATAYAMA, Yutaka KANAI,
ZHOU Huaiyang, and CHEN Jianfang
1620-1625 Poster Preview
Numerical Simulation of Paleotides around the Changjiang Estuary
at 6 Kyr B.P. and 10 Kyr B.P. (Poster)
Katsuto UEHARA, Yoshiki SAITO, and Kazuaki HORI
1625-1630 Poster Preview
Paleocurrent Studies on the borehole CM-97 Samples from the Changjiang Delta Using
Anisotropy of Magnetic Susceptibility: Preliminary Results (Poster)
Baozhu LIU, Yoshiki SAITO, Toshitsugu YAMAZAKI, Abdelaziz ABDELDAYEM,
Hirokuni ODA, and Kazuaki HORI
1630-1635 Poster Preview
Sedimentary Facies and Progradation Model of the Holocene Mekong River Delta in
Vietnam (Poster)
Susumu TANABE, Thi Kim Oanh TA, Van Lap NGUYEN, Masaaki TATEISHI,
Iwao KOBAYASHI and Yoshiki SAITO
1635-1640 Poster Preview
Role of remote-sensing survey for environmental change
Yasukuni OKUBO, Akiko TANAKA, Manabu KAKU and Sin SINSAKUL
1650-1730 Poster
0900-0910 Announcement
0910-0940
A Note on the Morphodynamic Processes on Different Time Scales in the Pearl River
Estuary
Chaoyu WU
0940-1010
Coastal Development of Modern Red River Delta, Vietnam
Tran Duc THANH and Dinh Van HUY
1010-1040
Landform and Environmental Change of the Lower Red River Delta,
Vietnam
Shigeko HARUYAMA and Vu Van PHAI
1040-1100 Coffee Break
1100-1130
Mekong River Delta Progradation into the Eastern Coast in the
Late Holocene, Southern Vietnam
NGUYEN Van Lap, TA Chi Kim Oanh, Masaaki TATEISHI, Susumu TANABE,
Iwao KOBAYASHI, and Yoshiki SAITO
1130-1200
Coastal Variation and Saltwater Intrusion Related Human Activities
on the Coastal Lowlands of the Mekong River Delta, Southern Vietnam
NGUYEN Van Lap, TA Thi Kim Oanh, and Masaaki TATEISHI
1200-1330 Lunch
1330-1400
Late Holocene Sea-Level Change and Evolution of the Central Plain, Thailand
Masatomo UMITSU, Sin SINSAKUL, Suwat TIYAPAIRACH, Niran CHAIMANEE
and Kumiko KAWASE
1400-1420
Sedimentary Sequences of PT Borehole, Lower Central Plain, Thailand
Suwat TIYAPAIRACH
1420-1440
Late Holocene Delta Front Migration of the Chao Phraya Delta,
Thailand
Yoshiki SAITO, Yoshio SATO, Yuichiro SUZUKI, Sin SINSAKUL, Suwat
TIYAPAIRACH, and Niran CHAIMANEE
1440-1510
Seismic Facies, Stratigraphy and Evolutionary Model of the Late
Quaternary Deposits in the Lower Central Plain of Thailand
Wichien INTASEN, Thawatchai TEPSUWAN and Suvit SERITRAKUL
1510-1530 Coffee Break
Papua New Guinea
1530-1600
The Markham Delta and the Alluvial Complexes of the Huon Peninsular,
Papua New Guinea
Niran CHAIMANEE
Other regions
1600-1630
Comparison of Grain-Size Parameters of Different Small Wave-Dominated
Deltas, Mexico and Japan
Hiroko OKAZAKI, Daniel Jean STANLEY, Eric E. WRIGHT, Masakazu
KISHI and Yoshiki SAITO
1630-1700
Large Scale Coastal Behavior of the Nile Delta, Egypt, and its
3D Chronostratigraphy Integrated into a GIS.
Daniel A. DeLISLE, Georges DRAPEAU, and Daniel J. STANLEY
1700-1710 Closing Address