论文部分内容阅读
我省位于北纬25～29度和东经104～109度之间,系云贵高原的东斜坡面。由于浸蚀切割剧烈,地势起伏甚大,地貌类型复杂。全省平均海拔1000米左右,西部威宁一带高达2400米以上,中部降至800～1200米,东部最低处不足300米。大部分地区,山岭与谷地相对高差达300～500米。因受地形地势的影响,气候变化较为复杂,灾害性天气,每年均有不同程度地发生。光、温、水、土等自然因素也因地而异。年平均温度为10.5～19.6℃;日照辐射量为77.7千卡/cm~2～116.9
The province is located between 25 ~ 29 degrees north latitude and 104 ~ 109 degrees east longitude, the east slope of the Yunnan-Guizhou Plateau. Due to the severe erosion and erosion, the terrain fluctuates greatly and the topography is complex. The average elevation of the province is about 1000 meters, the western Weining area reaches as high as 2,400 meters, the central down to 800 to 1,200 meters, the eastern lowest point of less than 300 meters. In most areas, the relative elevation between the mountains and valleys is 300 to 500 meters. Due to the influence of topography, the climate change is more complicated and the disastrous weather occurs to varying degrees every year. Natural factors such as light, temperature, water and earth also vary from place to place. The annual average temperature of 10.5 ~ 19.6 ℃; sunshine radiation is 77.7 kcal / cm ~ 2 ~ 116.9