China's major rivers into the sea profile

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

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