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近20年来,东北地区土地利用空间格局变化显著,且该区域处于我国最高纬度地区,是全球气候变化最敏感的区域之一,因此研究气候和土地利用变化对该区域水资源的影响,有助于该区域水资源的可持续管理。本研究基于1990年、2000年和2010年土地利用、气象和土壤数据,结合InVEST模型,研究近20年来东北地区产水量时空分布格局,并采用结构方程模型分析气候、土地利用变化对东北地区产水量的影响。结果表明,在1990—2010年间,中国东北地区产水量先降低后增加;空间尺度上,辽东山区、长白山区产水量较高、中部平原区产水量较低,而大、小兴安岭产水量则介于二者之间;结构方程模型分析表明,降水是导致东北地区产水量时空变化的主要因素,而温度和土地利用变化对研究区产水量的影响较小。
In the recent 20 years, the spatial pattern of land use change in Northeast China has been notable, and the region is at the highest latitude in China and is one of the most sensitive parts of global climate change. Therefore, studying the impact of climate and land-use change on water resources in this region is helpful Sustainable management of water resources in the region. Based on the data of land use, meteorology and soil in 1990, 2000 and 2010, combined with InVEST model, this study studied the temporal and spatial distribution pattern of water production in northeastern China in the past 20 years and analyzed the effects of climate and land use change on the yield of Northeast China The impact of water. The results showed that the water production in northeastern China decreased first and then increased from 1990 to 2010. On the spatial scale, the water production in Liaodong mountainous area and Changbai mountainous area was higher while that in the central plain area was lower, while that in Xiaoxing’an Mountains ranged from The analysis of structural equation model shows that precipitation is the main factor leading to the temporal and spatial variation of water production in Northeast China, while the changes of temperature and land use have little effect on the water production in the study area.