Relationship between climate and agricultural production in Deyang area

Deyang has good agricultural production conditions, and most areas belong to Dujiangyan gravity irrigation area, which is an important production base of grain, cotton, oil, pig, silkworm and tobacco in Sichuan Province.

The average annual rainfall in Deyang is 1088mm, and the total rainfall is 6. 478 billion cubic meters. The annual average surface runoff of the whole city is about 35 1.2 billion cubic meters; The shallow groundwater reserves in the city are about 3.54 billion cubic meters, with natural recharge of 654.38+0.446 billion cubic meters and exploitable capacity of 654.38+0.305 billion cubic meters.

Rivers in the hilly area of Deyang City are deeply cut, and shallow groundwater is mainly discharged by rivers, and surface runoff basically contains shallow groundwater. Rivers in plain areas are cut shallowly, and the amount of shallow groundwater discharged by rivers is less, and a large amount of surface water is converted into shallow groundwater. According to the analysis and investigation, the total local water resources in the city is 3.596 billion cubic meters, with 65.438+0.325 billion cubic meters of water diverted from Dujiangyan via the People's Canal and 65.438+0.58 billion cubic meters of water passing through natural rivers such as Kaijiang, Juanjiang and Qingming.