BURROWS OF THE POLYCHAETE PERINEREIS AIBUHIUTENSIS ON A TIDAL FLAT OF THE YELLOW RIVER DELTA IN CHINA: IMPLICATIONS FOR THE ICHNOFOSSILS POLYKLADICHNUS AND ARCHAEONASSA

Palaios ◽  
2019 ◽  
Vol 34 (5) ◽  
pp. 271-279 ◽  
Author(s):  
WANG YUANYUAN ◽  
WANG XUEQIN ◽  
ALFRED UCHMAN ◽  
HU BIN ◽  
SONG HUIBO
Keyword(s):  
Tidal Flat ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
The Yellow River Delta

Sediment Characteristics as a Function of Variable Hydrodynamics in a Tidal Flat of the Yellow River Delta, China

2013 ◽  
Vol 136 (1) ◽  
Author(s):  
Jiewen Zheng ◽  
Yonggang Jia ◽  
Xiaolei Liu ◽  
Hongxian Shan
Keyword(s):  
Tidal Flat ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
Hydrodynamic Conditions ◽  
Seabed Sediment ◽  
The Yellow River Delta ◽  
Topographic Features ◽  
Surface Samples

The role of hydrodynamics in the secondary reworking of sediment in a tidal flat of the Yellow River delta was studied. Field hydrodynamic conditions were measured in the study area, and subsurface and surface samples at selected points were collected. Laboratory analyses were performed to measure variations in the grain sizes, mineral constituents, and microstructures of the sediment. Moreover, fractal dimension calculations were introduced to obtain additional quantitative sedimentological data. The results of the studies indicate clear responses of the seabed sediment to variations in the hydrodynamic conditions both in the vertical profile and in a seaward transect and indicate that hydrodynamic changes can play a significant role in sculpting the topographic features of tidal flats.

Effects of reclamation on net ecosystem CO2 exchange in wetland in the Yellow River Delta, China

2013 ◽  
Vol 37 (6) ◽  
pp. 503-516 ◽  
Author(s):  
Li-Qiong YANG ◽  
Guang-Xuan HAN ◽  
Jun-Bao YU ◽  
Li-Xin WU ◽  
Min ZHU ◽  
...  
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
Co2 Exchange ◽  
River Delta ◽  
The Yellow River ◽  
Net Ecosystem Co2 Exchange ◽  
The Yellow River Delta

scholarly journals Impacts of Consolidation Time on the Critical Hydraulic Gradient of Newly Deposited Silty Seabed in the Yellow River Delta

2021 ◽  
Vol 9 (3) ◽  
pp. 270
Author(s):  
Meiyun Tang ◽  
Yonggang Jia ◽  
Shaotong Zhang ◽  
Chenxi Wang ◽  
Hanlu Liu
Keyword(s):  
Yellow River ◽  
Yellow River Delta ◽  
Hydraulic Gradient ◽  
River Delta ◽  
Theoretical Formula ◽  
The Yellow River ◽  
The Yellow River Delta ◽  
Critical Hydraulic Gradient ◽  
Seepage Flows ◽  
The Yrd

The silty seabed in the Yellow River Delta (YRD) is exposed to deposition, liquefaction, and reconsolidation repeatedly, during which seepage flows are crucial to the seabed strength. In extreme cases, seepage flows could cause seepage failure (SF) in the seabed, endangering the offshore structures. A critical condition exists for the occurrence of SF, i.e., the critical hydraulic gradient (icr). Compared with cohesionless sands, the icr of cohesive sediments is more complex, and no universal evaluation theory is available yet. The present work first improved a self-designed annular flume to avoid SF along the sidewall, then simulated the SF process of the seabed with different consolidation times in order to explore the icr of newly deposited silty seabed in the YRD. It is found that the theoretical formula for icr of cohesionless soil grossly underestimated the icr of cohesive soil. The icr range of silty seabed in the YRD was 8–16, which was significantly affected by the cohesion and was inversely proportional to the seabed fluidization degree. SF could “pump” the sediments vertically from the interior of the seabed with a contribution to sediment resuspension of up to 93.2–96.8%. The higher the consolidation degree, the smaller the contribution will be.

scholarly journals Nitrate leaching and NH3 volatilization during soil reclamation in the Yellow River Delta, China

2021 ◽  
pp. 117330
Author(s):  
Wei Zhu ◽  
Jingsong Yang ◽  
Rongjiang Yao ◽  
Xiangping Wang ◽  
Wenping Xie ◽  
...  
Keyword(s):  
Nitrate Leaching ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
Soil Reclamation ◽  
The Yellow River ◽  
Nh3 Volatilization ◽  
The Yellow River Delta
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