| River name | Average annual sea water (billion cubic meters / year) | Average annual amount of sand into the sea (million tons / year) | Average sediment concentration (kg /cubic meter) | The average tidal range (m) |
| Liaohe River | 43.46 | 796 | 3.27 | 2.58 |
| Luan River | 36.40 | 2010 | 4.4 | 1.00 |
| Haihe Rive | 228.00 | 2.48 | ||
| Yellow River | 592.00 | 110000 | 25.6 | 1.18 |
| yangtze river | 9755.00 | 46800 | 0.53 | 2.67 |
| Qiantang River | 373.00 | 659 | 0.20 | 5.54 |
| Minjiang River | 600.00 | 829 | 0.14 | 4.50 |
| Han Jiang | 525.00 | 727 | 0.29 | 1.50 |
| Pearl River | 3360.00 | 7098 | 0.22 | 1.0左右 |
Sea area |
Catchment area |
Runoff into the seaa |
Allocation of runoff into the sea seasons |
|||||
Area (sq km) |
Accounting for the total sea area (%) |
Runoff (billion cubic meters) |
Accounting for the total amount of water into the sea (%) |
spring（3-5month） |
summer（6-8month） |
autumn（9-11month） |
winter（12-2month） |
|
Bohai Sea |
1335910 |
31.0 |
892.28 |
4.7 |
14.4 |
45.0 |
32.1 |
8.5 |
Yellow Sea |
334132 |
7.7 |
782.50 |
4.2 |
10.6 |
72.6 |
13.6 |
3.2 |
East China Sea |
2044093 |
47.4 |
12173.22 |
64.7 |
22.9 |
39.3 |
27.5 |
10.3 |
South China Sea |
585637 |
13.6 |
4744.83 |
25.2 |
20.0 |
50.0 |
23.3 |
6.7 |
Directly into the Pacific Ocean |
11760 |
0.3 |
230.44 |
1.2 |
12.7 |
28.7 |
43.9 |
14.7 |
total |
4311532 |
100.0 |
18823.27 |
100.0 |
||||
1, temperate zone
2, tropical
3, subtropical
1, the end of the ancient coastline
2, the Quaternary early Pleistocene ancient coastline
3, the Quaternary late Pleistocene ancient coastline
4, dating back 6000 years ago the ancient coastline
5, dating back 9,000 years ago the ancient coastline
6, the current coastline
1, gravel
2, coarse sand
3, fine sand
4, silt
5, silty ooze
6, ooze
7, clay ooze
8, submarine volcanic deposits
Main Environmental Geological Problems in Diagram
1, seawater intrusion
2, ground subsidence
3, urban groundwater quality deterioration
Note
The black dotted line in the figure indicates the natural sea area
The blue lines in the picture indicate: the winter frozen world
Black font in the picture shows: the current lack of water resources in the coastal major cities
Global warming has led to melting of icebergs and glaciers, increased runoff into the sea, rising sea levels and reduced salinity in seawater, and coastal and coastal areas in China are suffering damage. Due to the lack of reasonable coastline planning, artificial coastline blossom everywhere, resulting in the expansion of land area, the acceleration of the natural coast to reduce the ecological protection function. In 2008, Tianjin natural coastline has all disappeared, the natural coastline are sea block, dykes, docks and other artificial coastline instead; Hebei more than 20 years, the average annual reduction of natural coastline and expand the artificial coastline of about 8 km; Fujian 40 years The coastline grew by 1,000 km.
coastal changes, seabed sediment and the main environmental geological problems
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