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Online Map of Coastal Evolution, Seabed Sediments and Major Environmental Geological Problems in China

Date: 2020-04-29  Editor : houxue2018   


Map description

China's major rivers into the sea profile

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

Statistics on the amount of water directly injected into each sea area from the Chinese coast

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

The coastal climate zone in the picture

1, temperate zone

2, tropical

3, subtropical

The map of the coast line

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

Figure undersea sediments

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

China's coastal shifts, seabed sediments and major environmental geology issues

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.

The map comes from the "China Geographic Atlas" in China's

coastal changes, seabed sediment and the main environmental geological problems

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