青海省河湟谷地1000年耕地重建数据

黄河上游的河湟谷地是人类活动历史悠久的地区之一，是黄河沿线耕地开垦的最西端，耕地重建对黄河流域人类活动和全球变化研究具有重要的现实意义。本数据包含河湟谷地1000年耕地重建数据，空间分辨率为1km×1km。搜集耕地数据后将原始田亩数据进行校正，将历史耕地数据转换为统一的现代单位（km2），后采用网格化模型将耕地数据进行空间化。耕地数据主要来源于 《宋史》 卷三百五十七 《何灌传》。县域行政界线的确定参考谭其骧主编的《中国历史地图集》。通过整理、校正该区历史文献中记载的1117年田亩数据，以期为揭示青藏高原典型河谷农业区耕地变化和人类活动的基本状况提供理论依据。

The Hehuang Valley in the Upper Yellow River is one of the regions with a long history of human activities, and it is the westernmost extent of cultivated land reclamation along the Yellow River. Reconstructing historical cultivated land is of great practical significance for studies on human activities in the Yellow River Basin and global change. This dataset contains 1000-year historical cultivated land reconstruction data for the Hehuang Valley, with a spatial resolution of 1 km × 1 km. After collecting cultivated land data, the original mu-based field data were calibrated, and the historical cultivated land data were converted into a unified modern unit (km²), followed by spatialization using a grid-based model. The cultivated land data were mainly sourced from *History of Song*, Volume 357, Biography of He Guan. The county-level administrative boundaries were determined with reference to *An Historical Atlas of China* compiled by Tan Qixiang. By sorting out and calibrating the mu-based field data recorded in historical documents of this region in 1117, this study aims to provide a theoretical basis for revealing the basic patterns of cultivated land changes and human activities in the typical valley agricultural area of the Qinghai-Tibet Plateau.