在系统分析研究历史文献、遥感信息和实地考察资料的基础上,综述了兰州市区水土流失现状及发展趋势;对土壤侵蚀界面支系统、侵蚀物源支系统、侵蚀动力支系统等水土流失环境系统结构组成及内部结构协调功能进行了综合分析研究,认为：该系统内部许多单因子自调节功能已遭到严重破坏,其中部分因子已超过环境自调节阈临界水平,恶性灾害将会与日俱增,并针对环境系统内部结构协调关系的恶化趋势,提出了综合而切合实际的调控对策。
Based on analyzing historical documents,remote sensing information and on the spot investigation data this paper firstly summarized current situation and trend of soil erosion in Lanzhou city proper.Secondly,it made a synthetical study on structure composition and it's function of soil erosion environment system,which is made up of soil erosion interface subsystem,source of erosion subsystem and erosion power subsystem.The authors pointed out that in this system,many factors'self-regulating functions had been sersiously broken and disasters would be increasing.Finaly,comprehensive and practicable countermeasures were put up in view of worse trend.
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