What does the climate effect of Dongjiang Lake mean?

The climate effect of large water body means that the water body effect changes from a warming effect at night to a weak cooling effect during the day around 10: 00, and then becomes a warming effect around 18: 00. When the temperature is very low, this effect will be delayed by 1-2 hours. In winter, the daily average temperature and minimum temperature at the far water station are obviously lower than those at the near water station, while the daily maximum temperature is slightly higher than that at the near water station. The daily temperature difference is obviously higher than that near the water body. The farther away from the water body, the weaker the warming effect of the water body, and the difference is stronger in sunny days and smaller in rainy days. Water can raise the extreme minimum temperature and restrain the maximum temperature. Generally speaking, water bodies have a warming effect in winter. In winter, the average temperature near the water body is about 2.03℃ higher than that in the far water body, which can increase the minimum temperature by 2.9℃, which is more conducive to the growth of citrus and can reduce the low temperature to the local area.

Dongjiang Lake belongs to subtropical monsoon humid climate. Due to the influence of comprehensive conditions such as landform, soil quality and vegetation in Nanling Mountains, and the climate effect in Dongjiang Lake area, it has obvious three-dimensional climate characteristics. The annual average temperature 17. 1℃, and the annual sunshine hours reach 1503.5 hours. The lowest temperature 1 month, with an average of 5℃, and the highest temperature in July, with an average of 30℃. The water temperature, light and heat are moderate, which is very suitable for fish growth and development. Due to the large heat capacity of large water bodies, the annual growth period of Dongjiang fish is one month longer than that of ordinary water bodies. The vegetation in Dongjiang Lake area is well preserved, with a coverage rate of over 80%. There are no large industrial and mining enterprises in the reservoir area, the ecology is primitive, the water quality has reached the national first-class drinking water standard through testing, and the physical and chemical factors are good.