青藏高原一江两河1200年耕地重建数据

历史土地覆盖重建研究不仅可以为全球变化和生态环境效应模拟提供基础数据，而且有助于深刻理解区域人地关系。青藏高原对于中国乃至世界具有极其重要生态安全意义，相较于我国其他区域，其长时间序列，特别是近千年的土地覆盖研究还十分薄弱。“一江两河”地区是指雅鲁藏布江中游及其主要支流拉萨河和年楚河流域，本研究以历史时期人类活动遗迹信息和历史文献的深度挖掘为基础，构建耕地格网化重建方法，重建了该区域1200年的耕地覆盖数据。首先，基于该区户口清查数据与户均耕地面积，估算了该时期的耕地面积总量。其次，采用基于自然因子和聚落等构建的耕地重建模型将耕地面积分配至空间。获得了该时期耕地空间分布数据。最后，该数据较好地呈现了1200年前后一江两河的耕地格局。

Research on historical land cover reconstruction not only provides fundamental data for global change and eco-environmental effect simulation, but also facilitates in-depth understanding of regional human-land relationships. The Qinghai-Tibet Plateau is of extremely vital ecological security significance to China and even the world. Compared with other regions in China, its research on land cover with long-term time series, especially over the past millennium, remains relatively weak. The "One River and Two Tributaries" area refers to the middle reaches of the Yarlung Zangbo River and the basins of its main tributaries, the Lhasa River and the Nianchu River. This study, based on the in-depth excavation of human activity relic information and historical documents in historical periods, constructed a grid-based cultivated land reconstruction method and reconstructed 1200-year cultivated land cover data of this region. First, the total cultivated land area of the period was estimated based on the household registration survey data and per-household cultivated land area of the region. Second, the cultivated land area was spatially allocated using the cultivated land reconstruction model built based on natural factors and settlements, thereby obtaining the spatial distribution data of cultivated land in this period. Finally, this data well presents the cultivated land pattern of the "One River and Two Tributaries" area around 1200 AD.