地理学报 ›› 2014, Vol. 69 ›› Issue (3): 312-322.doi: 10.11821/dlxb201403003

• 气候环境变化 • 上一篇    下一篇

中国历史时期森林空间格局网格化重建方法研究——以东北地区为例

李士成1,2, 何凡能1, 张学珍1   

  1. 1. 中国科学院地理科学与资源研究所, 北京100101;
    2. 中国科学院大学, 北京100049
  • 收稿日期:2013-08-13 修回日期:2013-12-10 出版日期:2014-03-20 发布日期:2014-03-20
  • 通讯作者: 何凡能(1963- ),男,福建仙游人,副研究员,中国地理学会会员(S110006132M),主要从事历史地理与环境变迁研究。E-mail:hefn@igsnrr.ac.cn
  • 作者简介:李士成(1989- ),男,山东费县人,博士研究生,主要从事土地利用/覆被变化研究。E-mail:lisc.10s@igsnrr.ac.cn
  • 基金资助:
    全球变化研究国家重大科学研究计划(2010CB950901);国家自然科学基金(41271227)

An approach of spatially-explicit reconstruction of historical forest in China:A case study in Northeast China

LI Shicheng1,2, HE Fanneng1, ZHANG Xuezhen1   

  1. 1. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2013-08-13 Revised:2013-12-10 Online:2014-03-20 Published:2014-03-20
  • Supported by:
    ChinaGlobal Change Research Program,No.2010CB950901;National Natural Science Foundation of China,No.41271227

摘要: 具有空间信息的历史土地覆被数据集是研究土地覆被变化气候与生态效应的基础数据。本文在潜在植被数据和现代遥感土地利用数据的基础上,确定了土地垦殖前森林植被可能的分布范围;遴选并量化了影响我国土地宜垦性的主导因子,评估了省域尺度上土地的宜垦性;构建了以土地宜垦性为权重的历史森林覆被网格化重建模型(网格大小为10 km×10km);重建了我国东北三省1780 年和1940 年网格化的森林覆被。结果表明:基于省域森林面积数据,该方法较好地再现了历史时期森林空间格局;与2000 年遥感有林地空间数据对比分析显示,模型重建结果与遥感数据绝对误差的单样本t 检验相伴概率(双尾)为0.12,大于显著性水平0.05,表明模型重建结果与遥感数据不存在显著性差异,网格化重建方法具有较好的可行性;同时,重建结果准确性评估也表明:1780 年重建结果在县域尺度上的相对误差在-30%~30%之间的县级政区有99个,占县级政区总数(不含无值区)的74.44%,总体误差相对较小。

关键词: 森林覆被, 东北地区, 历史时期, 网格化方法

Abstract: To research the climatic and ecological effects of historical land cover change, it is necessary to create historical land cover datasets with explicit spatial information. Using potential vegetation and satellite-based land use data, we determined the possible distribution extent of forest cover before reclamation. Then, some factors affecting land reclamation were selected to evaluate land suitability value of China for cultivation and then they were integrated into a model. Furthermore, historical forest gridding reconstruction model (the size of grid cell is 10 km by 10 km) was developed according to the land suitability value. As a case study, we reconstructed spatially explicit forest cover of 1780 and 1940 in Northeast China using this approach. The results demonstrated that the forest gridding reconstruction model we created can transform provincial forest area into spatially explicit data well. To test the model's rationality, we compared satellite-based forest cover and reconstructed forest cover of 2000. And the one sample t-test of the absolute error of them showed that the two-tailed significance was 0.12, larger than the significant level 0.05, suggesting that there was no significant difference between them and the gridding reconstruction method we designed was rational. The relative errors at county scale of forest cover reconstruction in 1780 of Northeast China were calculated. And the number of counties, whose relative error ranged from -30% ~ 30%, is 99, accounting for 74.44% of the totals (data missing counties are discharged).

Key words: gridding approach, historical period, forest cover, Northeast China