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本文所讨论范围是河南省东半部的平原,系黄淮海平原的一部分;北东两面以省界为限,西、南两面大约以100米等高线与太行山、伏牛山和大别山的山前丘陵分开。西界是一条由地形引起气候分异的非地带性界线;南界即为亚热带与暖温带的分界,是一条重要的气候和地理的地带性界线,这样划界,有利于保持淮河平原的完整性。
The range discussed in this paper is the plains of the eastern half of Henan Province and part of the Huang-Huai-Hai Plain. The north and east of the North East are limited by the provincial boundaries. The west and south sides of the plains are approximately 100 meters in height with the Taihang, Funiu and Dabie Mountains Hilly separate. The western boundary is a non-zone boundary caused by topography and climate differentiation. The southern boundary is the boundary between subtropical and warm temperate zones, which is an important regional boundary of climate and geography. This demarcation helps to maintain the integrity of the Huaihe River Plain Sex.