公元733年河湟谷地耕地分布格局重建

发布时间：2018-03-01 05:07

本文关键词： 耕地空间格局重建河湟谷地公元年　出处：《资源科学》2017年02期 　论文类型：期刊论文

【摘要】：典型区域历史时期高分辨率的土地利用/土地覆盖变化重建对研究过去全球环境变化和全球气候变化具有十分重要的意义。公元733年(唐代开元二十一年)是河湟谷地以军事屯田为主的农业发展的峰值期,是其屯田规模最为宏大、效益空前、原始土地覆盖影响最为深刻的时段。本文收集、整理了公元733年河湟谷地历史文献中的耕地数据,运用青藏高原河湟谷地区耕地网格化重建方法,结合历史时期聚落分布的实际状况,对耕地分布进行二次分配,分析并重建了公元733年前后河湟谷地耕地资源规模以及分布格局。结果显示:(1)公元733年河湟地区耕地开垦以军事屯田为主,共有123屯,估算出屯田总面积为321.13km2;(2)耕地空间分布主要以聚落为中心,以河流为中心线向外扩散,集中分布在湟水干流区域以及黄河河谷区域中的串珠状盆地内,受海拔高度和山地地形因素的限制,加之当时人口较少,耕地面积有限,全区仅有11.7%的网格有耕地分布;(3)垦殖强度受到自然条件和生产力水平的双重影响,垦殖率整体偏低,处于农业发展的成长期;全区耕地网格平均垦殖率为9.2%,最高垦殖率仅为18.9%,其中有31.4%的耕地网格垦殖率在9.0%以下,67.6%的耕地网格垦殖率在9.0%~15.0%之间,1.0%的耕地网格垦殖率达到15.0%~20.0%之间;(4)垦殖强度在行政单元之间具有明显的差异性,鄯州垦殖率较高,平均垦殖率接近13%;廓州垦殖率较低,南部西使地区垦殖率最低。
[Abstract]:The reconstruction of high-resolution land use / land cover change during the historical period of typical regions is of great significance for the study of global environmental change and global climate change in the past. A. D. 733 (Kaiyuan 21 in the Tang Dynasty) is a river. The peak period of agricultural development in Huanggu, which is dominated by military cultivation, This paper collects and collates the cultivated land data from the historical documents of the Hehuang Valley in 733 AD, which is the period of its largest scale, unprecedented benefit and the most profound impact of the original land cover. Using the method of reconstructing cultivated land in Hehuang Valley area of Qinghai-Tibet Plateau, combining with the actual situation of settlement distribution in historical period, the distribution of cultivated land is redistributed twice. The scale and distribution pattern of cultivated land resources in Hehuang valley before and after 733 AD were analyzed and reconstructed. The results show that the cultivated land in Hehuang area of AD 733 was mainly cultivated by military cultivation, with a total of 123tun. It is estimated that the total area of cultivated land is 321.13 km ~ 2 ~ 2 ~ (2)) the spatial distribution of cultivated land is mainly concentrated on settlement, with river as the center line and diffusing outward, and is concentrated in the beaded basins in the Huangshui main stream area and the Yellow River valley area. Limited by the factors of altitude and mountainous terrain, and because of the small population at that time and the limited area of cultivated land, only 11.7% of the grids in the whole area had the distribution of cultivated land. (3) the intensity of reclamation was affected by both natural conditions and productivity levels, and the overall reclamation rate was relatively low. In the growing period of agricultural development; The average cultivation rate of cultivated land grid in the whole area is 9.2, and the highest reclamation rate is only 18.9. among them, 31.4% cultivated land grid reclamation rate is below 9.0%, 67.6% cultivated land grid reclamation rate is between 9.0% and 15.0%, and 1.0% cultivated land grid reclamation rate is 15.0% and 20.0%) Reclamation intensity is between 15.0% and 20.0%. There are obvious differences between administrative units, The average rate of reclamation was close to 13 in Shanshan, and the reclamation rate was lower in Guzhou and the lowest in the southern region.
【作者单位】：青海师范大学生命与地理科学学院;青藏高原环境与资源教育部重点实验室;中国科学院地理科学与资源研究所中国科学院陆地表层格局与模拟重点实验室;
【基金】：国家自然科学基金项目(41271123,41550004) 中国科学院战略性先导科技专项(XDB03030500)
【分类号】：F323.211

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