基于GIS/RS技术的博尔塔拉河流域土壤侵蚀定量评价

摘要

以博尔塔拉河流域为研究区,运用地理信息系统(GIS)与遥感(RS)技术,建立流域内各土壤侵蚀影响因子分辨率为30 m×30 m的栅格图层,根据修正通用土壤流失方程(RUSLE)对各图层进行运算得到流域内土壤侵蚀的空间分布情况,估算该流域不同强度等级下的面积和流失量.结果表明,中度及以上侵蚀面积占到全区的26.8％,达到3 619.6 km2,这些区域标识了准确的地理坐标,同时可通过数据分析得出侵蚀强度与其中各因子的相关性,从而为针对性地提出最佳整治方案,流域内土地资源的质量评价、利用规划及经营管理等提供依据.%The main purpose of the study was to comprehensively adopt the geographic information system (GIS) and remote sensing (RS) technology to set up some 30 m×30 m grid layers about soil erosion influence factors.The results indicated that moderate and above soil erosion area accounts for 26.8％ in the whole area,which reaches 3 619.9 km2.There were the accurate geographic coordinate in these areas.At the same time,the corresponding relationships between the soil erosion intensity and the various factors were obtained by data analysis,which,thereby,provided scientific basis for the best improvement scheme,the land resources quality evaluation,use planning and management control.