scholarly journals Changes in sedimentary environment at Kim Son coastal plain - Ninh Binh, North Vietnam

2021 ◽  
Vol 21 (1) ◽  
pp. 1-11
Author(s):  
Vu Van Ha ◽  
Nguyen Minh Quang ◽  
Pham Quang Son ◽  
To Xuan Ban ◽  
Tran Ngoc Dien ◽  
...  
Keyword(s):  
Coastal Plain ◽  
Satellite Images ◽  
Accretion Rate ◽  
Sedimentary Environment ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
The Past ◽  
History Of ◽  
North Vietnam

Kim Son coastal plain is a part of the Red River Delta located between Day and Can rivers. Over the past 55 years, Kim Son coastal plain has been the region with the highest accretion rate in the Red River Delta. This study aims to clarify the sediment characteristics of Kim Son coastal plain. It has the structure of a typical tidal flat and a relatively straightforward tide-influenced sedimentary structure evidenced by the field observation, sampling 70 hand-drilled boreholes, borehole logging and analyzing 177 samples of grain size. There are three tidal sedimentary zones to be identified, including sand flat, mixed flat, and mudflat. The history of topographic changes is also presented over six periods from 1965 to 2020 based on analyzing and interpreting multi-time satellite images. The total accretion area of Kim Son coastal plain over 55 years was 4,081.2 ha.

scholarly journals ĐẶC ĐIỂM HỆ THỐNG SÔNG CỔ VÀ TÁC ĐỘNG NHÂN SINH DỰA TRÊN KẾT QUẢ MÔ HÌNH TIẾN HÓA TỈ LỆ LỚN KHU VỰC CHÂU THỔ SÔNG HỒNG

2020 ◽  
Vol 19 (4) ◽  
pp. 463-478
Author(s):  
Mai Duc Dong ◽  
Phung Van Phach ◽  
Nguyen Trung Thanh ◽  
Duong Quoc Hung ◽  
Pham Quoc Hiep ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
River System ◽  
River Network ◽  
River Delta ◽  
Red River ◽  
River Systems ◽  
Red River Delta ◽  
The World ◽  
History Of

The Simclast model has been verified and applied effectively in simulating the delta development for some major deltas in the world. In this study, we applied the model Simclast for simulating the history of the Red river delta development in late Pleistocene-Holocene. Results of the model reveal that the mainland of study area had reduced rapidly during transgression period (10,000-8,000 BP). The morphology changed significantly in the paleo-Red and Day river systems, but slightly in the paleo Thai Binh river system. The paleo-river network had been active in upper part before 11,000 BP and then shifted seaward until 2,000 BP. The river-sea interaction causes erosion and accumulation; as a result the morphology changed remarkably. The paleo-Thai Binh river had been inactive until 5,500 BP and then it was active but the morphology had not varied remarkably. The recent coastline generated from Simclast is relatively in accordance with the present coastline.

Pond culture in the Red River Delta, Vietnam.

2020 ◽  
Author(s):  
Peter Edwards
Keyword(s):  
Farming System ◽  
River Delta ◽  
Red River ◽  
Household Food Security ◽  
Small Scale ◽  
Red River Delta ◽  
Household Level ◽  
Household Food ◽  
North Vietnam ◽  
On Farm

Abstract The Red River Delta (RRD) in north Vietnam, one of the most densely populated areas in the world with over 1000 people per km2, has a traditional small-scale integrated farming system known locally as VAC in which a polyculture of carps is raised in household-level ponds in association with livestock and crops. VAC is an acronym for the Vietnamese words for garden (vuon), pond (ao) and livestock quarters (chuong). There are diverse linkages between VAC subsystems which vary with agroecological zone. The importance of VAC has long been recognized for household food security and increasingly as a source of income as the rice-based economy is diversified. Research with farmers has improved the efficiency of use of on-farm and locally available resources in VAC with extrapolated fish yields of 3-4 t ha-1 in the 700-1000 m2 ponds, giving cost:benefit ratios of 1:2.7-2.8.

Organochlorine pesticides and PCBs in the Red River Delta, North Vietnam

1998 ◽  
Vol 36 (9) ◽  
pp. 742-749 ◽  
Author(s):  
Dang Duch Nhan ◽  
Nguyen Manh Am ◽  
Nguyen Chu Hoi ◽  
Luu Van Dieu ◽  
F.P Carvalho ◽  
...  
Keyword(s):  
Organochlorine Pesticides ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
North Vietnam

Temporal changes in ostracod assemblages during the past 10,000years associated with the evolution of the Red River delta system, northeastern Vietnam

2011 ◽  
Vol 81 (3-4) ◽  
pp. 77-87 ◽  
Author(s):  
Gengo Tanaka ◽  
Toshifumi Komatsu ◽  
Yoshiki Saito ◽  
Duc Phong Nguyen ◽  
Quang Lan Vu
Keyword(s):  
Temporal Changes ◽  
River Delta ◽  
Red River ◽  
Red River Delta ◽  
The Past ◽  
Delta System

scholarly journals Psychiatry in Vietnam: a personal impression

1997 ◽  
Vol 21 (12) ◽  
pp. 779-780 ◽  
Author(s):  
John Wallace
Keyword(s):  
Mekong Delta ◽  
River Delta ◽  
Red River ◽  
Eastern Coast ◽  
Red River Delta ◽  
The Past ◽  
The North ◽  
South Vietnam ◽  
The World ◽  
North And South

After the fall of South Vietnam to North Vietnamese forces in 1975, Vietnam has remained virtually isolated from the rest of the world. With the global political changes of the past 10 years. the Hanoi Government succeeded in reducing Vietnam's international isolation in part by attempting to open the country's door to foreign visitors. The country stretches along the eastern coast of the Indo-Chinese peninsula and is slightly larger than Italy. It is ‘S-shaped’, broad in the north and south and very narrow in the centre (Fig. 1). The country's main cultivated areas are the Red River delta in the north and the Mekong delta containing Ho Chi Min city (Saigon) in the south.

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