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一、区域环境概况 1、自然环境 许昌市地处河南省中部,淮河流域颍河水系上游,总面积88km~2。该区属暖温带大陆性季风气候,多年平均气温14.5℃,多年平均日照时数为2184h,多年平均降水量729.8mm。降水受季风影响,年内年际变化大,丰水年与枯水年的降水量最大相差可达25倍,其中汛期降水量占全年的66％。市区地势由西北向东南倾斜,西北部属岗丘地貌,其余属平原地貌,西南和东南有碟状洼地。
I. Overview of Regional Environment 1. Natural Environment Xuchang is located in the upper reaches of Yinghe River in the central part of Henan Province and the Huaihe River basin with a total area of 88km ~ 2. The area is a warm temperate continental monsoon climate, the average annual temperature of 14.5 ℃, the average annual sunshine hours of 2184h, the average annual rainfall of 729.8mm. Precipitation is affected by the monsoon, and the interannual variation during the year is large. The difference between precipitation in the abundant and dry years is up to 25 times, of which precipitation in the flood season accounts for 66% of the whole year. Urban terrain from northwest to southeast tilt, northwestern Kong hill mound, the rest is a plains landscape, southwest and southeast disc-like depression.