基于3S技术的广西平果县石漠化分布特征及演变规律  

Distribution characteristics and evolution of rocky and desertified land in Pingguo County of Guangxi based on “3S” techniques

作　　者：王君华[1,2,3] 莫伟华[1] 陈燕丽[1] 莫建飞[1] 钟仕全[1] 苏永秀[1] 

机构地区：[1]广西区气象减灾研究所,国家卫星气象中心遥感应用试验基地,南宁530022 [2]鹿寨县气象局,广西柳州545600 [3]柳江县气象局,广西柳州545100

出　　处：《中国水土保持科学》2014年第3期66-70,共5页Science of Soil and Water Conservation

基　　金：国家农业科技成果转化资金项目"基于3S技术的优势农产品气候区划区试示范"(2007GB2E100249);中国气象局气候变化专项"广西石漠化区生态气象监测与评估业务建设"(CCSF201308);公益性行业(气象)科研专项资助项目"精细化农业气候区划及其应用系统研究"(GYHY(QX)2007-6-7);广西自然科学基金项目"广西农业生产的气候变化脆弱性评价关键技术研究"(2010GXNSFA013011)

摘　　要：岩溶石漠化是广西脆弱生态恢复建设中面临的突出生态环境问题。以1988、1998和2008年3个时相的TM/ETM卫星数据为主要信息源,综合碳酸盐空间分布图、石漠化状况实地调查结果和历史资料,基于3S技术,构建岩溶石漠化遥感监测和分级评价模型,研究广西平果县岩溶区石漠化空间分布特征及演变规律。结果表明:1)岩溶石漠化遥感监测和分级评价模型能够反映平果县石漠化状况,基本符合实地调查结果;2)平果县岩溶石漠化主要分布在该县西南部和中部,1988—2008年,平果县总体石漠化程度经历了稍加重然后逐渐变轻的变化趋势,石漠化呈现动态、缓慢、反复、可治理等特点。建议采取先易后难、逐步改善的治理策略。研究结果可为中国西南岩溶石漠化治理和区域生态建设的宏观决策提供参考。Rocky and desertified land （RDL） is one of the severest environmental problems in ecorehabilitation of Guangxi.With multi-temporal TM/ETM data as main information source,the distribution characteristics and evolution rules of RDL in Pingguo County of Guangxi in different periods were studied by field surveys and ＂3S＂ techniques.The fol1owing conclusions were obtained：1） monitoring methods and evaluation model of RDL can objectively reflect the basic situation of RDL in Pingguo County; 2） RDL is mainly distributed in some towns along the Zuoyou river coast and the northeast part of Pingguo County,and from 1988 to 2008 the occurrence degree of RDL worsened firstly and was then alleviated; 3） some advices are given that step-by-step improvement measures should be adopted in the control process.Some suggestions on comprehensive control of RDL are put forward and our proposals and results can be applied to karst regions in southwest China.

关 键 词：石漠化 TM/ETM 3S技术 分布特征 演变规律 

分 类 号：S157.2[农业科学—土壤学] P642.252[农业科学—农业基础科学]