What are the characteristics of the climate in Ningxia?

Ningxia belongs to temperate continental climate, which is characterized by dry and little rain, extreme continental climate and large temperature difference between year and month. Moreover, the closer to the center of the mainland, the drier it is, the greater the annual and daily temperature difference, and the transition of vegetation from forest to grassland and desert. Winter is cold and dry.

Hydrological characteristics of Ningxia:

The average annual water surface evaporation in Ningxia is 65438 0.250 mm, ranging from 800 to 65438 0.600 mm, and it is one of the provinces with large water surface evaporation in China. The annual average runoff of the whole region is 949.3 million cubic meters, and the annual average runoff depth is18.3mm, which is13 of the average of the Yellow River Basin and115 of the national average. The distribution of annual runoff is very uneven, with large mountains and small platforms; Nanda North is small. The annual runoff depth ranges from 300 mm in the southeast of Liupanshan Mountain in the south to less than 3 mm at the edge of the Yellow River irrigation area, with a difference of nearly 100 times. 70% ~ 80% of the runoff is concentrated in the flood season.

The water resources in Ningxia are mainly sulfate and chloride. 57% of the regional average salinity is greater than 2g/L; The salt content of the water in Ningxia section of the Yellow River is about 500 mg/L, and the water quality of urban water supply sources is basically up to standard. However, the arid areas of Central China and the hilly areas of the Loess Plateau are the most water-deficient, with small surface water and high salt content. Because groundwater is deeply buried, it is mostly bitter water or has low utilization value. Jinghe River is rich in water resources, but the actual utilization rate is low. In addition, there are Yellow River basin internal flow area (Yanchi) and inland river area (Gan Tang, Zhongwei and Shiyang River in Inner Mongolia).