What kind of environmental characteristics is this ancient poem about spring scenery written by spring outing improvisation?

Translation:

Standing at the head of the city to enjoy the scenery, I saw a large barren land, until the director was full of lush weeds. I have also seen thousands of hectares of fertile fields irrigated by farmers, but now, the cold mountain springs here are no longer irrigated, but let them pass. After the Anshi Rebellion, no one came here to watch the gorgeous mountain flowers, so they had to let the flowers bloom and fall. Although the birds sing tactfully, they also listen to themselves. Everything is so quiet and desolate.

Appreciate:

"Grass grows at the foot of Yiyang City", the author stood at the head of the city and looked at the scenery, only to see a large piece of barren land, until the head was full of lush weeds. Then, with a brush, people's vision was brought to Lianchang Palace and Nuwa Mountain.

"Water flows from east to west." In the Taiping period, when you climb the Yuzhen Road that Wuhou and Xuanzong once walked, you can not only see the beautiful scenery of "singing and flowing, smiling trees and flowers", but also see the fertile land irrigated by farmers with the water from the stream. But now, the clear mountain spring here is no longer irrigated by anyone, but let it flow from east to west. In the past, the fragrant bamboo, ancient willow, strange cypress and pine and cypress here attracted many tourists everywhere; Now, don't say that, even the beautiful spring flowers have long been appreciated.

The emphasis on the word "no flowers fall" here shows the poet's feelings for the times, indicating that after the Anshi rebellion, no one came here to watch and had to let it die!

"A hundred birds crow all the way to the spring mountain" not only reminds people of the beautiful scenery of rotten flowers and birds singing everywhere, but also uses the word "empty crow" to become a sad story with joy as a foil to silence, which fully shows the desolation of the mountain road; Not only have we never seen so many tourists here, but even farmers, woodcutters and village girls have disappeared. "Falling" and "crying in vain" care for each other, which shows how lonely the poet is in the face of great mountains and rivers.

Comments:

This is a landscape poem. When the author passed Yiyang in the spring, he felt something about the scenery in front of him and improvised the melancholy of "Although the mountains and rivers are cracked, flowers fall and birds sing". This poem is about static scenery, but static scenery is often dynamic: water, flowers and birds are all changing scenes.