The Neolithic Revolution in the South ca. 7/6000–2000 bce: Majiabang, Hemudu, Daxi, and Songze Cultures

2020 ◽  
pp. 52-72
Author(s):  
Xiangming Fang
Keyword(s):  
River Delta ◽  
Rice Cultivation ◽  
The South ◽  
Wood Technology ◽  
Neolithic Revolution ◽  
Yangzi River

This chapter analyzes the Neolithic revolution in the south from ca. 7/6000–2000 bce. The cultures it discusses include the Majiabang, Hemudu, Daxi, and Songze, primarily located in the middle and lower reaches of the Yangzi River Delta. Key phenomena explored in this chapter include rice cultivation; use of the stone plowshare; advanced wood technology; column architecture; surrounding dry trench settlement; high man-made platform altars; advanced crafts of painting, sculpting, and engraving; cosmological double bird symbolization (images of moonlight and sunlight); and other light and fertility symbols (rotating sun symbol with birds).

scholarly journals THE BRANCHING CHANNEL NETWORK IN THE YANGTZE ESTUARY

2012 ◽  
Vol 1 (33) ◽  
pp. 69
Author(s):  
Zheng Bing Wang ◽  
Pingxing Ding
Keyword(s):  
Yangtze Estuary ◽  
River Delta ◽  
Sediment Supply ◽  
Channel Structure ◽  
The South ◽  
Channel Network ◽  
The Yangtze Estuary ◽  
The North ◽  
Navigation Channel ◽  
The Impact

The channels in the Yangtze Estuary have an ordered-branching structure: The estuary is first divided by the Chongming Island into the North Branch and the South Branch. Then the South Branch is divided into the North Channel and South Channel by the Islands Changxing and Hengsha. The South Channel is again divided into the North and South Passage by the Jiuduansha Shoal. This three-level bifurcation and four-outlet configuration appears to be a natural character of the estuary, also in the past (Chen et al., 1982), although the whole system has been extending into the East China Sea in the southeast direction due to the abundant sediment supply from the Yangtze River. Recently, the natural development of the system seems to be substantially disturbed by human interferences, especially the Deep Navigation Channel Project. For the understanding of the behaviour of the bifurcating channel system in the estuary we present analysis on two aspects: (1) the equilibrium configuration of river delta distributary networks, and (2) influence of tidal flow on the morphological equilibrium of rivers. Based on the analyses we conclude that the branching channel structure of the Yangtze Estuary can be classified as tide-influenced river delta distributary networks. Its basic structure is the same as in case of river dominated delta. The empirical relations describing the basic features of the river-dominated distributary delta networks can be explained by theoretical analysis, although they are not fully satisfied by the Yangtze Estuary because of the influence of the tide. Two major influences of the tide are identified, viz. increasing the resistance to the river flow into the sea and increasing the sediment transport capacity. As consequence of these two influences the cross-sectional area of the river/estuary increases in the seawards direction and the bed slope decreases. The insights from the analyses are helpful for the understanding of the impact of the Deep Navigation Channel Project on the large scale morphological development of the estuary.

scholarly journals An assessment of irrigated rice cultivation with different crop establishment practices in Vietnam

2022 ◽  
Vol 12 (1) ◽  
Author(s):  
Van-Hung Nguyen ◽  
Alexander M. Stuart ◽  
Thi-My-Phung Nguyen ◽  
Thi-Minh-Hieu Pham ◽  
Ngoc-Phuong-Thanh Nguyen ◽  
...  
Keyword(s):  
Environmental Sustainability ◽  
Field Trials ◽  
Rice Production ◽  
River Delta ◽  
Rice Cultivation ◽  
Mekong River ◽  
Net Energy ◽  
Net Income ◽  
Mekong River Delta ◽  
Crop Establishment

AbstractOveruse of seed and chemical inputs is a major constraint for sustainable rice production in Vietnam. In this study, two seasons of field trials were conducted to compare different crop establishment practices for rice production in the Mekong River Delta using environmental and economic sustainability performance indicators. The indicators including energy efficiency, agronomic use efficiency, net income, and greenhouse gas emissions (GHGEs) were quantified based on four treatments including manual broadcast-seeding, blower seeding, drum seeding, and mechanized transplanting. Across the four treatments, yields ranged from 7.3–7.5 Mg ha−1 and 6.2–6.8 Mg ha−1 in the Winter-Spring (WS) and Summer-Autumn (SA) seasons, respectively. In comparison with direct seeding methods, mechanized transplanting decreased the seed rate by 40%. It also led to a 30–40% reduction in pesticide use during the main crop season (WS). Mechanized transplanting required higher inputs, including machine depreciation and fuel consumption, but its net energy balance, net income and GHGE were at a similar level as the other non-mechanized planting practices. Mechanized transplanting is a technology package that should be promoted to improve the economic and environmental sustainability of lowland rice cultivation in the Mekong River Delta of Vietnam.

Postglacial deltaic sediments, southern Fraser River delta, British Columbia

1991 ◽  
Vol 28 (9) ◽  
pp. 1386-1393 ◽  
Author(s):  
John J. Clague ◽  
J. L. Luternauer ◽  
S. E. Pullan ◽  
J. A. Hunter
Keyword(s):  
Seismic Reflection ◽  
Drill Hole ◽  
Main Channel ◽  
River Delta ◽  
Fraser River ◽  
The South ◽  
The West ◽  
Radiocarbon Dates ◽  
Strait Of Georgia ◽  
Fraser River Delta

The Fraser River delta, the largest delta on the west coast of Canada, has been built into the Strait of Georgia during the Holocene. Drill-hole and seismic reflection records reveal a succession of sedimentary units deposited during early Holocene progradation of the delta. These overlie an irregular surface developed on Pleistocene drift. Mud and silt, similar to sediments presently accumulating off the mouth of Fraser River in the southern Strait of Georgia, are conformably overlain by a thick unit of sandy foreset beds, dipping gently to the south-southwest into Boundary Bay and deposited in a foreslope environment. The foreset unit is sharply overlain by a much thinner topset sequence comprising silt and sand deposited in intertidal, fluvial-channel, and overbank environments, and peat deposited in swamps and bogs. Fifteen accelerator mass spectrometry radiocarbon dates on shell and wood indicate that most of the deltaic sediments south of the Main Channel of Fraser River were deposited between ca. 7500 and 5000 BP. By 5000 BP the locus of sedimentation had shifted from the south, into Boundary Bay, to the west and southwest, into the Strait of Georgia proper.

Assessment of sampling designs to measure riverine fluxes from the Pearl River Delta, China to the South China Sea

2007 ◽  
Vol 143 (1-3) ◽  
pp. 291-301 ◽  
Author(s):  
Hong-Gang Ni ◽  
Feng-Hui Lu ◽  
Xian-Lin Luo ◽  
Hui-Yu Tian ◽  
Ji-Zhong Wang ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
Pearl River Delta ◽  
The South China Sea ◽  
River Delta ◽  
Pearl River ◽  
The South ◽  
China Sea ◽  
The Pearl River Delta ◽  
The Pearl River
Sign in / Sign up

Export Citation Format

Share Document