Is the Yellow River Delta a topographic area?

The Yellow River Delta refers to the alluvial plain formed by sediment carried by the Yellow River estuary in Bohai Depression. Due to many changes in the history of the Yellow River Estuary, the so-called "Yellow River Delta" generally refers to the modern Yellow River Delta, that is, the fan-shaped zone with Kenli Ninghai as the apex, Taoerhekou in the north and gully in the south is the modern Yellow River Delta, with an area of about 5,400 square kilometers, of which 5,200 square kilometers are in Dongying City.

The Yellow River Delta is located in the mid-latitude, warm temperate zone, with its back land facing the sea, influenced by Eurasia and the Pacific Ocean, and belongs to the warm temperate semi-humid continental monsoon climate zone. The basic climate features are: Leng Xia is hot in winter, with four distinct seasons. It is dry and windy in spring, with changeable temperature in early spring, often cold in late spring and rapid in late spring, which often causes spring drought.

In summer, it is hot and rainy, hot and humid, and sometimes it is attacked by typhoons; In autumn, the temperature drops, the rain drops sharply, and the sky is crisp; In winter, the weather is dry and cold, cold wind blows frequently, and rain and snow are scarce. The main wind directions are north wind and northwest wind.

The temperature difference between the four seasons in the Yellow River Delta is obvious. Annual average temperature11.7-12.6℃, extreme maximum temperature 4 1.9℃, extreme minimum temperature -23.3℃. The annual average sunshine hours are 2590-2830 hours; The frost-free period is 2 1 1 day; The average annual precipitation is 530-630mm, 70% of which is distributed in summer. The average evapotranspiration is 750-2400 mm.