陈泓旭

【摘   要】 将四平市选为研究区域，根据有关文献，对适宜性评价因子进行选取以及确定其权重，再将其分为四个等级。基于ArcGis的分析识别模版，按照权重值大小对各评价因子进行叠加分析处理。研究结果显示，Ⅰ级适宜性所占比例最大，近乎研究区面积的半数，为41.13%;Ⅱ级适宜性位居次席，占总面积的29.89%;这表明四平市内大部分区域是适合进行农业生产的。Ⅲ级的面积为2927km2，Ⅳ级面积为1223km2。Ⅳ级，也就是不适宜进行农牧生产的区域大多分布在四平市的东部及南部，要尽量避免在此耕作。又从自然和人文两个方面对四平市适宜性分布现状进行了分析，结果可为接下来农牧业生产规划提供一些参考。

【关键词】 四平市;适宜性评价;地理信息系统

中图分类号：S159               文献识别码：A               文章编号：2096-1073（2020）07-0050-52

Suitability evaluation of agricultural land in Siping City based on DEM

CHEN Hongxu

（College of Tourism and Geographic Science， Jilin Normal University   Siping， Jilin   136000）

[Abstract] Siping city was selected as the research area. According to the relevant literature， the suitability evaluation factors were selected and their weights were determined， and then they were divided into four grades. Based on the analysis and identification template of ArcGis， the evaluation factors were analyzed and processed superposition according to the weight value. The results showed that grade Ⅰ suitability， the largest proportion of almost half of the area in the study area， 41.13%; Ⅱ suitability ranked second， accounting for 29.89% of the total; This shows that most areas in Siping city are suitable for agricultural production. Ⅲ level covers an area of 2927 km2， Ⅳ level covers an area of 1223 km2. Ⅳ level， which is not suitable for agriculture and animal husbandry production area is mostly distributed in siping in southern and eastern， try to avoid in the farming. The suitability distribution in Siping city is analyzed from two aspects of nature and humanity. The results can provide some references for the following agricultural and animal husbandry production planning.

[Key words] Siping city; suitability evaluation; geographic information system

为了对研究区域土地的应用途径和开发程度进行判别，需要对土地进行土地适宜性的分析[1]。随着计算机技术的发展以及GIS的应用，计算机辅助叠加制图方法更加受到欢迎。在当下，土地适宜性评价的方法不仅能够用来对评价模型进行建造和完善，还可以用来对研究评价的指标进行判别。而网络多媒体技术与适宜性评价相结合，更是未来的发展前景[2]。数字高程模型能通过一组有次序的数列来表示地面地形形态，是一种实体的地面模型，包含了大量的地表形态数据，DEM数据维土地适应性的研究提供了坚实的数据保障[3]。

本文以四平市为着手点，通过选取绝对高度、坡度、坡向、地势起伏度4个评价因子，通过应用GIS，从多个方面对四平市农用土地适宜性的定量评价进行叠置分析。……