scholarly journals Analysis of the Influence of the Shibahu Channel on Water Level and Sediment in the Lower Reach Yellow River

2021 ◽  
Vol 768 (1) ◽  
pp. 012038
Author(s):  
Jiang Caodong ◽  
Ma Liangchao ◽  
Li Dongfeng ◽  
Zhang Hongwu ◽  
Li Zihao
Keyword(s):  
Water Level ◽  
Yellow River ◽  
Lower Reach

scholarly journals Variation Tendency of Coastline under Natural and Anthropogenic Disturbance around the Abandoned Yellow River Delta in 1984–2019

2021 ◽  
Vol 13 (17) ◽  
pp. 3391
Author(s):  
Zhipeng Sun ◽  
Xiaojing Niu
Keyword(s):  
Water Level ◽  
Tidal Flat ◽  
Intertidal Zone ◽  
Anthropogenic Disturbance ◽  
Yellow River ◽  
Cumulative Effect ◽  
Yellow River Delta ◽  
River Delta ◽  
Flat Area ◽  
Flat Profile

The coast around the Abandoned Yellow River Delta underwent significant changes under anthropogenic disturbance. This study aims to reveal the variation of the coastline, tidal flat area, and intertidal zone slope before, during, and after extensive reclamation during the period of 1984–2019 using satellite remote sensing images. In order to eliminate the influence of the varying water level, a new coastline correction algorithm had been proposed under the condition of insufficient accurate slope and water level data. The influence of seawalls on slope estimation were considered in it. The spatiotemporal evolution of coast had been analyzed and confirmed to be reasonable by comparing with the observed data. The results show that the coast can be roughly divided into a north erosion part and a south deposition part. Affected by reclamation, their tidal flat area in 2019 is reduced to only 43 and 27% of original area in 1984, respectively, which results in a continuous decrease in the tidal flat width. The adjustment of the tidal flat profile makes the slopes steeper in the erosion part, while the slopes in the deposition part remain stable. The reclamation has stimulated a cumulative effect as the disappearance of the intertidal zone, which may lead to the destruction of biological habitats.

A new method for fitting the complicated water level process of the lower Yellow River

2009 ◽  
Vol 52 (10) ◽  
pp. 2997-3003
Author(s):  
YongSheng Yuan ◽  
JiChun Wu ◽  
YiJun Zuo ◽  
JieRen Chen
Keyword(s):  
Water Level ◽  
Yellow River ◽  
New Method ◽  
Lower Yellow River ◽  
The Lower Yellow River ◽  
Level Process

Model Test Study on Embankment Instability Induced by Rapid Drawdown of Water Level at Yellow River Downstream

2010 ◽  
Vol 160-162 ◽  
pp. 750-755
Author(s):  
Yu Kun Zhao ◽  
Ji Hong Yang ◽  
Qing An Li
Keyword(s):  
Water Level ◽  
Model Test ◽  
Yellow River ◽  
Digital Camera ◽  
Hydrodynamic Pressure ◽  
Test Methods ◽  
Test Study ◽  
Short Period ◽  
Water Lever ◽  
Water Level Decline

Rapid drawdown of water level is one of the most important factors that influencing the embankment stability. Based on the principle of geomechanical model test and hydroaulic model test methods, the model test was performed to study Yellow River downstream embankment instability induced by rapid drawdown of water level. The slope models with geometric scale of 1:25, 1:45, 1:62.5 were constructed in the transparent plexiglass model box with 1.6m long, 0.8m wide and 0.6m high. Changes on the slope were recorded during water level decline at different velocity by digital camera and slope tracer etc. The model test results showed that during the rapid drawdown process, there was only small cracks and not slippage in advance; when the water level dropped to a certain height, the sliding distance increased suddenly, which showed that the rate of water level decline was behind the river water, and the slope weight and downslope hydrodynamic pressure by the saturation line in slope body were higher than water lever exceeds the sliding force in a very short period of time, which caused landslide; after the sliding body appearing, slide was continuous and not mutation.

Effects of Water Level and Salinity on Total Sulfur Contents in Salt Marsh Soils of the Yellow River Delta, China

Wetlands ◽  
2015 ◽  
Vol 36 (S1) ◽  
pp. 137-143 ◽  
Author(s):  
Qiongqiong Lu ◽  
Junhong Bai ◽  
Zhaoqin Gao ◽  
Junjing Wang ◽  
Qingqing Zhao
Keyword(s):  
Salt Marsh ◽  
Water Level ◽  
Yellow River ◽  
Yellow River Delta ◽  
River Delta ◽  
The Yellow River ◽  
Total Sulfur ◽  
The Yellow River Delta

Environmental flow requirements of fish in the lower reach of the Yellow River

2010 ◽  
Vol 35 (4) ◽  
pp. 381-396 ◽  
Author(s):  
Xiaohui Jiang ◽  
Angela Arthington ◽  
Liu Changming
Keyword(s):  
Yellow River ◽  
Environmental Flow ◽  
The Yellow River ◽  
Lower Reach

scholarly journals Limitations of Water Resources to Crop Water Requirement in the Irrigation Districts along the Lower Reach of the Yellow River in China

2019 ◽  
Vol 11 (17) ◽  
pp. 4680 ◽  
Author(s):  
Lei Liu ◽  
Jianqin Ma ◽  
Xiuping Hao ◽  
Qingyun Li
Keyword(s):  
Winter Wheat ◽  
Water Supply ◽  
Water Demand ◽  
Yellow River ◽  
Water Requirement ◽  
The Yellow River ◽  
Lower Reach ◽  
Crop Water ◽  
Irrigation Districts ◽  
The Impact

To analyze the water-resource limitations for crops in irrigation districts along the lower reach of the Yellow River, we used the single-crop coefficient method provided by FAO-56 to analyze crop water demand (CWD) and irrigation water requirement (IWR) for the main crops (winter wheat, summer maize, and cotton) from 1971 to 2015. The impact of climate threats on IWR was then quantified based on the standardized precipitation evapotranspiration index (SPEI), following which the conflicts between water demand and water supply were analyzed. The results show that about 75.4% of the total annual IWR volume is concentrated from March to June. Winter wheat is the largest water consumer; it used an average of 67.9% of the total IWR volume. The study area faced severe water scarcity, and severe water deficits occurred mainly between March and June, which is consistent with the occurrence of drought. With the runoff from the Yellow River Basin further decreasing in the future, the water supply is expected to become more limited. IWR is negatively correlated with the SPEI. Based on the relationship between SPEI and IWR, the water allocation for irrigation can be planned at different timescales to meet the CWD of different crops.

scholarly journals Variation in water level under ice-jammed condition – field investigation and experimental study

2005 ◽  
Vol 36 (1) ◽  
pp. 65-84 ◽  
Author(s):  
Jueyi Sui ◽  
Bryan W. Karney ◽  
Daxian Fang
Keyword(s):  
Water Level ◽  
Yellow River ◽  
Experimental Studies ◽  
Field Investigation ◽  
River Ice ◽  
Experimental Investigations ◽  
Physical Parameters ◽  
Ice Jams ◽  
Frazil Ice ◽  
Ice Concentration

This paper presents the impacts of frazil ice jams on the variation in water level at the Hequ Reach of the Yellow River in China. Based on both field observations and experimental studies, it is found that both the evolution of frazil ice jams and the associated variation in water level depend upon an interesting interaction between hydraulic variables during the ice-jammed period. In particular, the critical Froude number governing the formation of river ice jams and their upstream propagation is about 0.09. The water level during ice-jammed periods depends not only on the slope of the water surface and the water level under open-water conditions with the same discharge, but also on the length of the ice jam and the ice concentration in the water. Moreover, the field investigations show that the thickness of river ice strongly influences the variation in water level during ice-jammed periods. Empirical relationships are derived to quantify the relationship between the highest water level during ice periods and related physical parameters. To confirm the field results, and to explore the influence of ice discharge on the variation in water level, experimental studies were also conducted. These results confirm that the ice concentration plays a key role in the variation in water level and the jam thickness. Given the complexity of the jamming processes, surprisingly good agreement is observed between field and experimental investigations.

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