项目名称: 过去千年中国耕地空间格局变化研究
项目编号: No.41271227
项目类型: 面上项目
立项/批准年度: 2013
项目学科: 天文学、地球科学
项目作者: 何凡能
作者单位: 中国科学院地理科学与资源研究所
项目金额: 80万元
中文摘要: 土地覆盖变化是气候变化的主要驱动因素之一,因而成为各类气候与生态效应模型的重要边界条件。目前有关我国长时间尺度土地利用变化的量化研究,还十分薄弱。本项目拟在系统收集我国过去千年人口、田亩、土地制度、赋役制度和垦殖政策等史料的基础上,通过对不同历史时期"田亩数字"性质与内涵的考释,以及影响"田亩数字"偏离实际耕地数量原因的剖析,构建基于史载资料进行耕地数据校准的方法,重建过去千年我国各省(路、道)区耕地面积变化序列;探讨利用GIS技术再现历史耕地空间格局的网格化方法,建立中国过去千年耕地网格化数据集(空间分辨率为10km×10km);在此基础上,揭示近千年来我国土地利用变化的基本规律及时空特征,阐明不同历史时期影响土地利用变化的主要驱动因素。为深入开展我国长时间尺度土地覆盖变化的气候与生态效应模拟研究提供可靠的基础数据,为实现重建我国历史时期土地覆盖变化这一科学目标提供理论基础和方法保障。
中文关键词: 土地利用与土地覆被变化;网格化重建;时空特征;驱动因素;过去千年
英文摘要: As one of the main driving factors of climate change, land cover status was considered as an important boundary condition in climate and ecological simulations. However, quantifications of China long history Land Use/Cover Change (LUCC, hereafter) are scarce. By collecting historical records about population, taxes-cropland area, land policies, tax policies and reclamation policies systematically and analyzing the meanings and properties of taxes-cropland area in different periods of ancient China and the reason of why taxes-cropland area is not real cropland area, we will design a method on the basis of historical records to calibrate taxes-cropland area. And then we will reconstruct cropland area of each province (or Lu/Dao, i.e. province-level political unit in the ancient of China) of China for the last millennium. Additionally, by means of GIS, we'll design an approach of gridding reconstructing historical cropland's spatial pattern to reconstruct gridding cropland datasets at the cell size of 10 km by 10 km for the last millennium of China. Finally, we'll try to reveal the basic law of land use and spatiotemporal characteristics in China for the last millennium and clarify the main driving factors of LUCC in different historical periods by analyzing the reconstruction results. The reconstruction results ca
英文关键词: land use and land cover change (LUCC);gridding reconstruction;spatial–temporal characteristics;driving factors;last millennium