辽代西拉木伦河流域聚落分布与环境选择

辽代西拉木伦河流域及毗邻地区的聚落是分析论证农业开垦范围与环境扰动的重要依据，作者将这一地区的聚落分为两类，其中之一为散居在各处的基层聚落，规模小，人口少，围绕聚落形成的耕地范围也有限，不是造成环境扰动的主要方面。另一类以府、州城为中心形成的聚落，人口集中，耕地范围大，且大部分州治城邑属契丹历史纪念地，而不是农业垦殖适宜地；个别州治城邑地处沙地中部，不具备农业开垦的条件，由于人口集中，这些农田插花地不但范围大，而且是引起环境问题的关键地区。

Distribution of Settlements and Environmental Choices in the Xila Mulun River Valley and Its Neighborhood During the Liao Dynasty

The distribution of settlements in the Xila Mulun River Valley and its neighborhood in the Liao Dynasty is the key factor for analyzing the scope of cultivation and the disturbance of environment. This paper divides the settlements in the area into dichotomies: 1) fundamental settlements dispersing loose-footed, which were relatively small in size and population, and the surrounding cultivated land were limited; and 2) settlements centered by prefectural capitals and county seats, where the population was relatively concentrated and the scope of cultivated land was larger. Most of the latter settlements were memorial places of Khitan history rather than agriculture-fitted ones. Under very few circumstance, to some extreme extent, the county seat located in the centre of the desert, where the farming conditions did not exist, but due to the concentration of the population, the intermingle cultivated lands were highly developed. These areas were critical factors causing environmental problems.