近15年来黄河三角洲土地利用演化及成因分析

 黄河三角洲是中国三大河口三角洲之一,同时也是世界上陆地资源生长最快的地区之一。在自然演替和人工干扰的相互作用影响下,该地区土地利用/覆被变化非常迅速并成为当前研究的热点。通过解译研究区1995、2004 和2010 年遥感影像,利用转移矩阵、土地利用变化图等从数量和结构变化两方面对该地区的土地利用变化进行了分析。同时结合现有基础数据源,从自然因素和社会因素两方面对其成因进行了探究和分析。结果表明:研究区的各类土地利用一直处于动态变化之中,建设用地、水体、盐田虾塘都呈现增加的态势,而草地、林地等在波动中下降,未利用土地比重仍然很大,土地利用类型复杂度不断增加。自然因素和社会因素的影响互为补充累积,共同影响着研究区的土地利用类型变化,其中,社会因素起主导作用,但自然因素的影响也不容忽视。

Analysis of the land use history and the causes in Yellow River Delta during the last 15 years

The Yellow River Delta is one of three major river deltas in China and the fastest growing areas for land resources in the world. With the influence of the interaction between the natural succession and the artificial interference, the LUCC changes rapidly and becomes the focus of current researches in this area. The analysis of the land use in the oriented zone has been completed in aspects of the quantity and the structure by interpreting the remotely sensed images of 1995, 2004 and 2010. The LUCC is analyzed based on the transfer matrix, and the picture of the land use variation. Furthermore, from natural and social aspects, the contributing factors are explored and analyzed by combining the current basic data source. The results show that the curves of all kinds of land use are dynamic in the oriented zone; the area of the construction land, the water, the salt field and the ponds is expanding; while the area of the grassland and the woodland is dwindling; The portion of the unused land keeps still large; and the complexity of the land use types increases constantly. The effects of natural factors and social factors work together, and influence the change of land use types in the oriented zone mutually. The social factors play a leading role, but the influence of natural factors also cannot be ignored during the processing.