Geographical environment of Xingren county

Xingren County is located in the middle of southwest Guizhou Province, adjacent to Zhenfeng County in the east, Anlong County and Xingyi City in the south, Pu 'an County in the west, Qinglong County in the north, and Guanling across the mountains and rivers in the northeast. Xingren belongs to the subtropical mild and humid monsoon climate zone of low latitude plateau, with obvious vertical differences in climate, which is characterized by "dry and hot valleys, cool and humid mountains, no severe cold in winter and no intense heat in summer". The winter climate in Xingren County is warm and dry. Due to various factors, it is characterized by a mild and humid monsoon climate in the northern subtropical zone of the plateau, with no severe cold in winter, no heat in summer, a long frost-free period and the same season of rain and heat. In spring, cold and warm air masses appear alternately, the weather is very unstable, and there are often strong winds and cold in late spring. In summer, due to the influence of the southeast moist air circulation, there are many southerly winds, high humidity and heavy rain, but the heat intensity is low. When the western Pacific high extends westward and ocean typhoons land in Guangdong and Guangxi, it will bring precipitation to the county. Autumn lasts for a short time and cools down quickly. When the cold air in the north is strong, the autumn wind forms in the south. When the cold and warm air masses are evenly matched, autumn rain often occurs. Winter is controlled by the cold air circulation in the northwest and north to south, with more northerly winds, low humidity and less precipitation in the cold and dry continental air mass, so the phenomenon of "dry winter" often occurs. The cold air mass is a long way to the south, and the territory of Daxian County has become denatured, which has no serious impact, but there are also phenomena such as snowfall and freezing.

The disastrous weather caused by weather fluctuation includes drought, hail, cold in late spring, rainstorm, autumn wind and strong wind. Xingren belongs to the plateau-type north subtropical mild and humid monsoon climate, with no severe cold in winter, no heat in summer, long frost-free period and the same season of rain and heat. The annual average temperature in Xingren County is 65438 05.2℃. July is the hottest, with an average temperature of 22. 1℃. 1 month is the coldest, with an average temperature of 6. 1℃. The extreme maximum temperature is 34.6℃ and the minimum temperature is -7.8℃. The number of days above lO℃ is 243 days, and the annual accumulated temperature above 10℃ is 4588℃. In the valley areas below1000m in the northeast, such as Suojiang River, Boyang River, Mashahe River and Chapu River, the annual average temperature is above 16℃, the average temperature in June-August is above 22℃, and the average temperature in July is above 24℃. The annual average temperature in the ridge areas such as Duantou Mountain, Dayakou Mountain and Magu Mountain in the west is below 1600 meters above sea level. The average annual temperature in most other areas is between 14- 15℃. The annual average temperature in Baling, Chengguan and Tunjiao is about 15- 16℃.

Precipitation is measured from 1942 to 1 1.5. By the end of 1985, the total precipitation was 56,555.8 mm, the annual average precipitation was 13 15.3 mm, the annual average precipitation days were 190 days, and the annual average precipitation days were 6.9 mm. At least 1960 (960.4 mm). The number of days with daily precipitation greater than or equal to 25mm is 56 1 day, with an average of 13 days; The number of days greater than or equal to 50 mm is 164 days, with an average of 4 days per year; 13 is greater than or equal to 100 mm, and the maximum daily precipitation is 207.6 mm, which occurs in1971September 14. The longest continuous precipitation days over the years reached 28 days, with the precipitation of 247.8 mm, and the time was 197 1 year. The longest continuous days without precipitation is 29 days, and the time is 1949 years.

The distribution of precipitation in Xingren County gradually decreases from west to northeast. The rainy area is in the area from Duantou Mountain, Dayakou to Magu Mountain. Dianmu, Gaowu, Panjiazhuang, west of Longchang Line, Zhang Yu District; On the western edge of Chengguan and Huangjiao District, the average annual precipitation is above 1400 mm ... The rainy center of the county is in the downhill, Wangjiazhai, Kongbai, Dew Camp, Zhang Yu and Jiaole areas, with the average annual precipitation of 1500 ~ 1540 mm; The rainy area is in the mountainous area, and the average annual precipitation is between1180 ~1250 mm; Other areas are between 1250 and1400 mm.