摘要
借用地理信息系统(GIS)和遥感(ERDAS)技术,以修正的通用水土流失方程(RUSLE)为核心,根据吉溪流域2001年和2003年的遥感影像解译数据和统计资料得到地貌、降雨量、植被等资料,量化流域土壤侵蚀评价因子,对吉溪流域土壤侵蚀进行了定量化分析。结果表明,吉溪流域年均土壤侵蚀模数为2339.21 t/km2,侵蚀强度属轻度,2003年较2001年土壤侵蚀有所改善,中度侵蚀及其以上等级的土壤侵蚀量分别占总侵蚀量的48.71%和77.51%。最后确定流域土壤侵蚀重点治理的区域和流域最佳管理措施(BMPs),为吉溪流域水土保持和水环境保护研究工作提供科学依据。
Based on the RS data, the watershed inventory data derived in 2001 and 2003, and the field data, including physiognomy, vegetation, and rainfall, RUSLE is combined with GIS to estimate the soil loss by erosion. After the data processing, the distribution and quantity of the soil erosion degree in 2001 and 2003 in the Jixi watershed can be determined by ArcView. Results showed that the annual soil erosion amount of the Jixi watershed is 2 339.21t/hmz , which is in the category of light degree erosion. The study explains the soil erosion distribution of the Jixi watershed, and also analysis the changes between 2001 and 2003. The total soil erosion of 2001 is 1 833 546.12 t/hm^2, which is worse than the one of 2003 （the total soil erosion is 931 399. 56 t/hm^2 ）. The study also points out the region which is needed to control first, and provide the theoretical foundation for the study of the soil and water conservation as well as water environment protection.
出处
《地质灾害与环境保护》
2007年第3期5-10,共6页
Journal of Geological Hazards and Environment Preservation
基金
福建省教育厅基金(JB05026)
福州大学校人才基金(XJY-0110)
