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首页> 外文期刊>Environmental Monitoring and Assessment >Assessment for Salinized Wasteland Expansion and Land Use Change Using GIS and Remote Sensing in the West Part of Northeast China
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Assessment for Salinized Wasteland Expansion and Land Use Change Using GIS and Remote Sensing in the West Part of Northeast China

机译：基于GIS和遥感的东北西部盐碱地荒漠化扩展与土地利用变化评价。

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摘要

Due to human impact under climatic variations, western part of Northeast China has suffered substantial land degradation during past decades. This paper presents an integrated study of expansion process of salinized wasteland in Da'an County, a typical salt-affected area in Northeast China, by using Geographic Information Systems (GIS) and remote sensing. The study explores the temporal and spatial characteristics of salinized wasteland expansion from 1954 to 2004, and land use/cover changes during this period. During the past 50 years, the salinized wasteland in study area have increased by 135,995 ha, and in 2004 covers 32.31% of the total area, in the meantime grassland has decreased by 104,697 ha and in 2004 covers only 13.15% of the study area. Grasslands, croplands and swamplands were found the three main land use types converted into salinized wasteland. Land use/coverrnchanges shows that between 1954 and 2004, 48.6% of grasslands, 42.5% of swamplands, and 14.1% of croplands were transformed into salinized wasteland, respectively. Lastly, the major factors influencing salinized wasteland expansion and land use/cover changes were also explored. In general, climatic factors supplied a potential environment for soil salinization. Human-related factors, such as policy, population, overgrazing, and intensified and unreasonable utilization of land and water resources are the main causes of salinized wasteland expansion.
机译：由于气候变化对人类的影响，东北地区的西部地区在过去几十年中遭受了严重的土地退化。本文利用地理信息系统（GIS）和遥感技术，对东北地区典型的盐灾区大安县盐碱化荒地的扩展过程进行了综合研究。该研究探讨了1954年至2004年盐碱化荒地扩展的时空特征，以及此期间的土地利用/覆盖变化。在过去的50年中，研究区的盐渍化荒地增加了135,995公顷，2004年占总面积的32.31％，草地减少了104,697公顷，2004年仅占研究面积的13.15％。发现草地，农田和沼泽地的三种主要土地利用类型已转化为盐渍化的荒地。土地利用/覆盖变化显示，在1954年至2004年之间，分别有48.6％的草地，42.5％的沼泽地和14.1％的耕地被转化为盐碱化的荒地。最后，还探讨了影响盐碱化荒地扩展和土地利用/覆盖变化的主要因素。一般而言，气候因素为土壤盐渍化提供了潜在的环境。政策，人口，过度放牧以及土地和水资源的集约化和不合理利用等与人有关的因素是盐碱化荒地扩张的主要原因。

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