方法：对项目点北碚区进行抽样调查。
The application of sample survey method in history research is analyzed.
对重庆市北碚区的21个坡面泥石流的实地调查表明，坡度对坡面泥石流发生具有重要的控制性作用。
The investigations on 21 debris flows on mountain slope in Beibei District, Chongqing makes clearly that gradients are very important to debris flow on mountain slope.
结论北碚区农村饮水安全工程水质质量2009年较2008年有大幅提高，但总体合格率仍然很低。
Conclusion By comparison of water quality indicators in the rural area of Beibei in 2008, the water quality was improved greatly in 2009, but the overall qualified rate was still low.
通过以重庆市万州区、北碚区、酉阳县为研究样点，剖析了其土地利用动态度、土地利用程度和景观结构的变化情况。
Taking Wanzhou, Beibei and Youyang of Chongqing as the example, this paper analyzes the changes in land use dynamic degree, land use degree index and landscape structure.
通过以重庆市万州区、北碚区、酉阳县为研究样点，剖析了其土地利用动态度、土地利用程度和景观结构的变化情况。
Taking Wanzhou, Beibei and Youyang of Chongqing as the example, this paper analyzes the changes in land use dynamic degree, land use degree index and landscape structure.
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