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42年来兴国县土壤侵蚀时空变化规律研究
引用本文:梁音,潘贤章,孙波.42年来兴国县土壤侵蚀时空变化规律研究[J].水土保持通报,2006,26(6):24-27,71.
作者姓名:梁音  潘贤章  孙波
作者单位:中国科学院,南京土壤研究所,江苏,南京,210008
基金项目:中国科学院基金;国家科技攻关计划
摘    要:以江西省兴国县为研究区域,应用遥感和GIS技术,借助6个不同时段的黑白航片、MSS影像和TM数据为信息源,在建立土壤侵蚀解译标志的基础上,对全县3 215 km2范围内的土壤侵蚀进行了监测研究。结果表明,该县从1958—2000年42 a期间,土壤侵蚀的变化分2个阶段。第一阶段是1982年前,全县的侵蚀面积在2 000 km2左右;第二阶段是从80年代初到2000年,该县被列为全国水土流失综合治理重点区,侵蚀面积在18 a间共减少了739 km2,平均每年减少41 km2。将1992与2000年的土壤侵蚀图叠置分析可以看出,该县5个侵蚀等级的面积都有不同程度的降低;在侵蚀等级的转变方面,大约有34%的侵蚀面积,其侵蚀等级发生了改变,其中以改变一个等级的面积为主,大约有66%的侵蚀面积其侵蚀等级未发生变化,说明兴国县的土壤侵蚀已呈现出明显的减弱趋势。

关 键 词:土壤侵蚀  动态监测  遥感技术  GIS空间分析
文章编号:1000-288X(2006)06-0024-04
收稿时间:2005-11-29
修稿时间:2005-11-292006-07-05

Spatial and Temporal Variations of Soil Erosion in Xingguo County from 1958 to 2000
LIANG Yin,PAN Xianzhang and SUN Bo.Spatial and Temporal Variations of Soil Erosion in Xingguo County from 1958 to 2000[J].Bulletin of Soil and Water Conservation,2006,26(6):24-27,71.
Authors:LIANG Yin  PAN Xianzhang and SUN Bo
Institution:Institute of Soll Science, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China
Abstract:The spatial and temporal variations of soil erosion were investigated by taking Xingguo County,Jiangxi Province as a research area.Remote sensing and GIS techniques were applied in the study of the county area of (3 215) km~2.Remote sensing data of six years such as black-white aero-photograph,MSS images and Landsat TM data were obtained.Interpretation characteristic indexes were established from remote sensing images.Results showed that from 1958 to 2000,changes in the eroded area may be divided into two different periods.First period ranged from 1958 to 1982,and the soil erosion area was increased to about 2 000 km~2.Second period ranged from 1982 to 2000.During the period,the county was ratified as a national representative region for controlling soil erosion.The total erosion area of the county was decreased by 739 km~2 during the 18 years,which implied an average decrease of 42 km~2 per year.The erosion areas for five grades were found to be somewhat decreased through comparing soil erosion map in 1992 with that in 2000.Soil erosion grades in about 34% of soil erosion area were subject to change,and the change was dominated by one of the grades.Soil erosion grades in about 66% of soil erosion area were not changed.This means that soil erosion in this county is lowering obviously.
Keywords:soil erosion  dynamic monitoring  remote sensing technique  GIS special analysis
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