scholarly journals Soil Hydraulic Properties of Plinthosol in the Middle Yangtze River Basin, Southern China

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1783
Author(s):  
Yongwu Wang ◽  
Tieniu Wu ◽  
Jianwu Huang ◽  
Pei Tian ◽  
Hailin Zhang ◽  
...  
Keyword(s):  
Fractal Dimension ◽  
River Basin ◽  
Water Conservation ◽  
Yangtze River ◽  
Hydraulic Properties ◽  
Southern China ◽  
Yangtze River Basin ◽  
Soil Hydraulic Properties ◽  
Spatial And Temporal Scales ◽  
Soil Hydraulic

Soil hydraulic properties are ecologically important in arranging vegetation types at various spatial and temporal scales. However, there is still a lack of detailed understanding of the basic parameters of plinthosol in the Middle Yangtze River basin. This paper focuses on the soil hydraulic properties of three plinthosol profiles at Yueyang (YE), Wuhan (WH), and Jiujiang (JU) and tries to reveal the origin of plinthosol and the relationship among the soil hydraulic parameters. Discriminant analysis indicated that the plinthosol in the JU profile was of aeolian origin, while that in the WH and YE profiles was of alluvial origin; soil hydraulic properties varied greatly among these profiles. The proportion of macro-aggregates (>0.25 mm, weight%) in the JU profile (88.28%) was significantly higher than that in the WH (73.63%) and YE (57.77%) profiles; the water holding capacity and saturated hydraulic conductivity of JU plinthosol was also higher than that of WH and YE plinthosol; the fact that Dr and Di of the JU profile are lower than those of the YE and WH profiles illustrates the stability of JU plinthosol is better than that of YE and WH plinthosol, which is consistent with the fractal dimension of aggregates. The disintegration curves of white vein and red matrix demonstrated a large discrepancy in the JU profile, but these curves showed a similar trend in the WH and YE profiles. The differences in hydraulic properties might be ascribed to the origin of plinthosol, and the results of the fractal dimension also confirmed this conclusion. This study might provide a better understanding of the soil physical properties of plinthosol and shed light on the soil and water conservation measures in the Middle Yangtze River basin.

scholarly journals Summer Drought Patterns in the Middle-Lower Reaches of the Yangtze River Basin and Their Connections with Atmospheric Circulation before and after 1980

2016 ◽  
Vol 2016 ◽  
pp. 1-18
Author(s):  
Shuping Li ◽  
Guolin Feng ◽  
Wei Hou
Keyword(s):  
River Basin ◽  
Moisture Transport ◽  
Yangtze River ◽  
Southern China ◽  
Yangtze River Basin ◽  
Summer Drought ◽  
The Yangtze River ◽  
Before And After ◽  
Drought Pattern ◽  
The Yangtze River Basin

The three summer drought patterns of the middle-lower reaches of the Yangtze River basin (MLRYRB) and their associated atmospheric circulation were investigated before and after 1980. For the whole-basin wide drought pattern during 1961–1979, the anomalous high ridge over Japan blocked the northerly flow from Siberia to southern China. Further, the western Pacific subtropical high (WPSH) was weaker than normal and shifted eastward. For the southern drought and northern flood pattern during 1961–1979, the zonal circulation was straight and an anomalous anticyclonic circulation was located over Japan. Less moisture was transported to southern China associated with the weakened WPSH. During 1980–2013, the WPSH extended westward and controlled the southern part of the MLRYRB, and an anomalous cyclonic circulation was centered over Japan. For the southern flood and northern drought pattern during 1961–1979, the meridional circulation was obvious, and the WPSH was weaker than normal. The anomalous southwesterly moisture transport appeared to southern China. However, during 1980–2013 the continental high pressure impacted northern China. The WPSH shifted eastward and the anomalous northeasterly moisture transport presented over eastern China.

scholarly journals Reflections on the Catastrophic 2020 Yangtze River Basin Flooding in Southern China

2020 ◽  
Vol 1 (2) ◽  
pp. 100038 ◽  
Author(s):  
Ke Wei ◽  
Chaojun Ouyang ◽  
Hongtao Duan ◽  
Yunliang Li ◽  
Mingxing Chen ◽  
...  
Keyword(s):  
River Basin ◽  
Yangtze River ◽  
Southern China ◽  
Yangtze River Basin

Anastomosing river system along the subsiding middle Yangtze River basin, southern China

CATENA ◽  
2005 ◽  
Vol 60 (2) ◽  
pp. 147-163 ◽  
Author(s):  
Suiji Wang ◽  
Zhongyuan Chen ◽  
Derald G. Smith
Keyword(s):  
River Basin ◽  
Yangtze River ◽  
Southern China ◽  
Yangtze River Basin ◽  
River System

scholarly journals Impacts of Spatiotemporal Anomalies of Tibetan Plateau Snow Cover on Summer Precipitation in Eastern China

2017 ◽  
Vol 30 (3) ◽  
pp. 885-903 ◽  
Author(s):  
Chenghai Wang ◽  
Kai Yang ◽  
Yiling Li ◽  
Di Wu ◽  
Yue Bo
Keyword(s):  
Tibetan Plateau ◽  
Snow Cover ◽  
River Basin ◽  
Yangtze River ◽  
Southern China ◽  
Yangtze River Basin ◽  
Eastern China ◽  
Summer Precipitation ◽  
The Yangtze River ◽  
The Yangtze River Basin

Abstract Tibetan Plateau (TP) snow cover undergoes significant temporal and spatial variations during the winter and spring months. This study investigates the relationship between the spatiotemporal distribution of winter–spring snow cover (SC) over the TP and summer precipitation in eastern China (EC) using the singular value decomposition (SVD) method. Four simulation experiments are designed to validate the results of SVD analysis. Both observations and simulations show that heavier snow cover in the southern TP leads to more rainfall in the Yangtze River basin and northeastern China, and less precipitation in southern China, whereas heavier snow cover in the northern TP results in enhanced rainfall in southeastern and northern China and weakened precipitation in the Yangtze River basin. The linkage is attributed to anomalous westerly winds in the upper troposphere at around 200 hPa and to changes of the southern branch of westerlies at 500 hPa on the south side of the TP, which are caused by lasting diabatic heat anomalies over the TP. The shifts in position of the westerly jet at the exit region and negative anomalies of geopotential height at 500 hPa further result in anomalous anticyclone over the East China Sea and the corresponding 850-hPa water vapor convergence and influence the anomalous summer precipitation belt in EC.

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