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为了定量研究土地盐渍化时空演变影响因子相对影响力的大小,以新疆库车县灌区为例,基于现阶段土地盐渍化研究成果,在3个不同的空间尺度下,分别提取8个土地盐渍化时空演变影响因子,应用灰色关联方法分析。结果表明:人类活动引起的土地覆盖/利用变化是主导因素,地形、地下水埋深、地下水矿化度在较小的空间尺度上起主导作用;土地覆盖/利用变化、水体、灌溉和排水渠系统在较大空间尺度上起主导作用;灌溉系统对土地盐渍化过程的影响大于排水系统;气候条件不是土地盐渍化发生演变的主要影响因子。
In order to quantitatively study the relative influence of influencing factors of temporal and spatial evolution of land salinization, taking Kuqa County Irrigation District in Xinjiang as an example, based on the research results of land salinization at present stage, 8 lands were extracted under 3 different spatial scales The influencing factors of the salinization spatiotemporal evolution are analyzed by gray relational method. The results show that the change of land cover / utilization caused by human activities is the dominant factor. Topography, groundwater depth and salinity of groundwater play a leading role in the smaller spatial scales. Land cover / utilization changes, water body, irrigation and drainage system Which plays a leading role in larger spatial scales. Irrigation system has more influence on the salinization process than drainage system. The climatic conditions are not the main influencing factors of salinization.