(目的)本研究以行政村为评估单元,分析新郑市村域土地生态状况及其变化情况,为合理科学的利用土地提供依据。(方法)通过GIS和RS平台,综合运用遥感影像、统计报表与野外调查数据,采用多因素综合评价法对两期新郑市村域土地生态状况进行综合评估。(结果)结果表明： 2011年、2014年新郑市农村地区土地生态状况分别以二等级、一等级为主,该部分村庄占评价区域面积的58.29%、43.45%。位置分布上,南部山区的农村土地生态状况最好,中部平原其次,北部与郑州市接壤的地区最差,整体呈现三级阶梯型分布。动态分析表明,2011—2014年四年内,农村土地生态状况发展呈现变好趋势的村庄面积占评价区域面积的32.61%,这部分村庄主要分布在新郑市的南部、东部地区,呈现变差趋势的村庄面积占评价区域面积的21.14%,这部分村庄主要分布在新郑市的中北部地区。(结论)该研究获得了新郑市农村地区土地生态状况的优劣分布及其变化情况,为保护土地生态以及合理利用土地奠定了基础。
Abstract
Taking administrative villages as the assessment unit to analyze the land ecological status and changes in the rural area of Xinzheng, we aims to provide a basis for rational and scientific land use. Based on the platform of GIS and RS, we comprehensively assessed land ecological status in Xinzheng’s two phases rural area by using remote sensing image, statistical report and field survey data, and the multi- factor comprehensive evaluation method. The results showed that: in 2011 and 2014, Xinzheng’s rural land ecological condition was mainly the second level and the first level, respectively, accounting for 58.29% and 43.45% of the evaluation area; in terms of location distribution, the rural land ecological condition of the southern mountainous area was the best, that of the central plain was the secondary, that of the north and the
Zhengzhou border area was the worst, presented a three-stage ladder type distribution; the dynamic analysis showed that: during 2011-2014, the village area with a better trend of land ecological situation accounted for 32.61% of the evaluation area, these villages mainly distributed in the southern and eastern regions of Xinzheng; the village area with a worse trend of land ecological situation accounted for 21.14% of the evaluation area, mainly distributed in the central and northern regions of Xinzheng. The distribution and change of land ecological status in the rural areas of Xinzheng lays a foundation for land ecology protection and land rational use.
关键词
土地生态状况;主成分分析法;回归分析;动态变化
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Key words
land ecological status; principal component analysis; regression analysis; dynamic change
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