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一、自然地理概况华北中原平原地理分布为北纬28°20’—42°10’,东经111°40’—112°00’,包括辽河下游平原、辽西走廓、黄淮海平原和长江中下游平原。气候属暖温带和南亚热带气候。南北气候差异大,年均气温分布为7.8—17.9℃,从北到南递增,年降水量分布为480—1670mm,从北到南递增。华北中原平原地貌由三部份组成,即山麓平原(海拔50—100m),低平原(海拔5—50m)和滨海平原(海拔小于5m)。主要土类有褐土、潮
I. Introduction to Natural Geography The plains of North China are geographically distributed between latitude 28o 20’-42o 10’N and longitude 111o 40’-112o 00E, including the Liaohe River downstream plain, the western Liaohe profile, the Huang-Huai-Hai Plain and the middle and lower reaches of the Yangtze River plain . The climate is warm temperate and southern subtropical climate. North-South climate differences, the annual average temperature distribution of 7.8-17.9 ℃, increasing from north to south, the annual precipitation distribution of 480-1670mm, increasing from north to south. The plains of North China Plain consists of three parts, namely the plains (50-100m above sea level), low plain (5-50m above sea level) and the coastal plains (less than 5m above sea level). The main soil is cinnamon, tide