Abstract: The?extraction?of?soil?erosion?in?complex?topographical?region?is?much?more?difficult?than?that?in?flat?region.?RUSLE?is?the?most?widely-used?model?for?soil?erosion,?but?it?only?supplies?the?extraction?algorithms?at?normal?condition.?Therefore,?it?is?necessary?to?make?a?proper?modification?of?extraction?method?on?corresponding?erosion?factors?to?apply?RUSLE?to?the?complex?topographical?region?effectively.?The?extraction?method?of?topographical?factor?and?cover-management?factor,?which?are?affected?seriously?by?complex?topography?are?focused,?and?a?more?precise?extraction?method?is?proposed,?which?has?been?applied?to?the?experiment?in?Zigui?county?of?Three?Gorges?Reservoir?area.?The?test?results?indicate?the?algorithm?can?extract?the?soil?erosion?information?effectively.

Key words: complex topographical region , soil erosion , influence factor , topographical factor , cover-management factor ;

摘要： 相对与地形平坦地区,复杂地形区土壤侵蚀的提取存在较大的难度。RUSLE是目前应用最广泛的土壤侵蚀 经验模型,但它只提供了一般条件下土壤侵蚀的提取方法。为了将RUSLE有效的应用在复杂地形区,需要对模型 中相关侵蚀因子提取方法进行适当的调整。因此重点对受复杂地形影响严重的地形因子和作物覆盖与管理因子 的提取方法进行研究,提出了更准确的提取方法。利用该方法对三峡库区的姊归县进行实验,结果表明,该方法可 以有效提取土壤侵蚀信息。

关键词: 复杂地形区, 土壤侵蚀, 影响因子, 地形因子, 作物覆盖与管理因子