1998—2014年阿克苏河流域耕地景观时空变化研究

发布时间：2018-01-01 07:04

本文关键词：1998—2014年阿克苏河流域耕地景观时空变化研究　出处：《西南林业大学学报(自然科学)》2017年02期 　论文类型：期刊论文

【摘要】：以新疆阿克苏河流域为研究对象,利用遥感和GIS解译了研究区1998年、2002年、2006年、2010年、2014年5个时相的Landsat TM/ETM/OLI遥感影像数据。针对耕地信息,分别从耕地面积动态变化、耕地重心空间迁移、耕地景观格局变化等分析阿克苏河流域耕地近16年的变化过程,并从人口增长、社会经济增长、水利设施建设等方面分析这些因素对该流域耕地变化的影响。结果表明:整个流域耕地面积持续增加,上、中、下游耕地面积增加幅度有所不同,下游耕地面积增幅最大,上游次之,中游最小;流域上、中、下游耕地重心坐标在不同时段内分别向不同方向迁移,但总体表现为上游向东迁移,中游向南迁移,下游向北迁移;流域内耕地间逐渐聚拢,空间上接连成片,斑块面积不断增大,景观异质性降低;阿克苏地区人口和社会经济的持续增长是流域耕地面积持续扩张的重要原因,水利设施的配套建设保证了不断增加的耕地的用水灌溉。
[Abstract]:Taking the Aksu River Basin in Xinjiang as the research object, remote sensing and GIS were used to interpret the study area on 1998, 2002, 2006 and 2006. Landsat TM/ETM/OLI remote sensing image data of five phases in 2014. According to the information of cultivated land, the dynamic change of cultivated land area and the spatial migration of cultivated land center of gravity were carried out respectively. The change of cultivated land landscape pattern in Aksu River basin is analyzed in the last 16 years, and from the population growth, social and economic growth. The effects of these factors on the cultivated land changes in the basin are analyzed in the construction of water conservancy facilities. The results show that the cultivated land area of the whole basin continues to increase, while the increase range of the upper, middle and lower reaches of the cultivated land area is different. The increase of cultivated land area in the lower reaches is the largest, followed by the upper reaches and the middle reaches. The barycentric coordinates of cultivated land in the middle and lower reaches of the river basin migrate in different directions in different periods, but the overall characteristics are that the upper reaches migrate eastward, the middle reaches move south, and the lower reaches migrate northward. The cultivated land in the watershed gradually converges, and the patch area increases continuously, and the landscape heterogeneity decreases. The continuous growth of population and social economy in Aksu area is an important reason for the continuous expansion of cultivated land in the basin. The construction of water conservancy facilities ensures the continuous increase of water irrigation of cultivated land.
【作者单位】：西南林业大学林学院;
【基金】：国家自然科学基金项目(31460195,31660236)资助
【分类号】：F323.211;P901
【正文快照】： 土地利用/覆被变化一直以来都是国内外研究的热点问题[1-4],耕地作为农业活动的载体是土地利用研究的重点内容之一[5-6]。随着人口的不断增加、农业现代化的推进,人类改变自然的能力增强,耕地面积开始大幅度增加,对土地的开发和利用强度也愈发剧烈。在西部干旱区,绿洲既作为人

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