喀斯特山区耕地损失空间分布规律及其影响因素研究

发布时间：2018-06-02 17:07

本文选题：喀斯特山区 + 土地利用变化　；参考：《西南农业学报》2017年01期

【摘要】：耕地是保障人类生存和发展的基本条件,是土地资源中最重要的组成部分。本文利用凯里市2003年和2013年的遥感影像,基于Erdas和Arc GIS平台,经过图像分类、数字化以及空间数据叠加分析与统计,研究耕地损失在高程和坡度影响下的空间分布情况。结果表明:1凯里市海拔普遍较高,其土地利用/覆被变化主要发生在700~1000 m高程范围内;而地形约束使其土地利用方式在5°~25°的坡度范围内变化最大;2总体上耕地损失量占对应高程范围总面积的比例随着高程增加呈现出逐渐减少的趋势;3随着坡度增加耕地损失量呈现出先急剧增加而后急剧减少的态势,在5°~15°坡度范围内达到最大值。
[Abstract]:Cultivated land is the basic condition for human survival and development and the most important part of land resources. In this paper, the spatial distribution of cultivated land loss under the influence of elevation and slope is studied by using the remote sensing images of Kaili city in 2003 and 2013, based on the Erdas and Arc GIS platforms, through image classification, digitization and spatial data superposition analysis and statistics. The results showed that the elevation of Kaili was generally high, and the land use / cover change mainly occurred in the range of 700m ~ 1000m. However, the land use pattern has the largest change in the slope range of 5 掳or 25 掳because of terrain constraints. Overall, the proportion of the loss of cultivated land to the total area of the corresponding elevation range shows a decreasing trend with the increase of elevation and the ratio of the loss of cultivated land to the total area of the corresponding elevation range is gradually decreasing with the increase of slope. The loss of cultivated land shows a trend of sharp increase and then sharp decrease. The maximum value was reached in the range of 5 掳and 15 掳.
【作者单位】：四川师范大学西南土地资源评价与监测教育部重点实验室;四川师范大学地理与资源科学学院;
【基金】：国家自然科学基金(41371125) 四川省教育厅课题(16ZB0061)
【分类号】：F323.211

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