辽代西辽河冲积平原及邻近地区的湖泊

辽代前期西辽河冲积平原上有许多较大湖泊 ,但辽代后期这些湖泊不见于记载 ,反映了辽代西辽河流域的湖泊与环境有很大变化。辽代独特的人文地理现象——“捺钵”制度 ,与西辽河流域多湖泊有一定关系

The Changes of the Lakes in the Flood Plain of West Liao River in Liao Dynasty

There were many lakes in the flood plain of West Liao River during the earlier stage of Liao Dynasty(AD 915~1125 ). They were mentioned frequently in the historical literatures about Liao Dynasty. And these lakes existing made the particular phenomena of human geography in Liao Dynasty. The emperors of Liao Dynasty went to these lakes to capture the swan and some other migratory birds and fishing in the spring of every year. However, in later half stage of Liao Dynasty, the emperors didn't go to the flood plain of West Liao River nearby but went to the north-east direction faraway to the flood plain of Nen Jiang(River) downstream fo capturing and fishing in the spring of every year. This change of emperors activities in spatial for capturing and fishing in spring was very obviously. It was related with no political reason according to historical literatures, but with reducing and disappearing of the lakes on the flood plains of West Liao River, because the lakes existing on the this plain in the earlier stage of Liao Dynasty were not mentioned in the literatures in later half stage of Liao Dynasty, there was a important fact that the emperor Sheng Zong of Liao Dynasty ordered to make a reservoir by storing water for his capturing in a spring when he wanted to go capturing to the flood plain of West Liao River in later half stage of Liao Dynasty.