During the day, the wind at Duchang Hydrological Station blows the lake wind or the land wind.

Are you asking Duchang Hydrological Station whether the daytime wind blows the sea wind or the land wind? It's the sea breeze.

During the day, the sun shines on Duchang Hydrological Station, and both land and ocean will absorb heat and heat up. The specific heat capacity of seawater is larger than that of the ground, and the temperature of the ground is much higher than that of the sea. The air above the land is relatively high and the density is low, and the air above the sea surface will be blown to the land to supplement it, forming a sea breeze.

Hydrological stations are grass-roots hydrological institutions that observe and collect hydrometeorological data of rivers, lakes, reservoirs and other water bodies.