水土保持径流小区监测方法探讨——以甘肃省定西市安家沟监测点为例
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水利部“全国水土流失动态监测与公告项目”


Methods of Runoff Measurement from Plot Scales -Taking A川iagou Catchment in Din}ci,Gansu as an Example
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    摘要:

    径流小区在水土保持监测工作中发挥着非常重要的作用,是其它方法所不能替代的。要保证小区资料的准确性和可靠性,选择正确的观测方法和数据处理方法是关键。在半干旱地区,降雨场次的划分是区分次降雨径流的主要依据,特别是在阴雨连绵的情况下,就更需要合理划分降雨径流的场次,以客观记录"次降雨径流"过程。本研究尝试用置换法处理水样,只需购置比重瓶即可进行测定,设备简单,快捷高效,既保证了数据质量,也能有效降低处理水样的经济成本。因而,建议在水土流失强度比较大的地区用置换法处理水样。同时,涉及径流小区的相关资料,也不能简单或盲目地直接引用,必须经过相应的修订和验证。

    Abstract:

    Plot-scale runoff experiments play an important role in soil and water conservation monitoring, which can not be replaced by other measures. In order to ensuring the accuracy and reliability of the data from the plot scale measurements, it is crucial to finding the most suitable methods regarding monitoring and data analyzing procedures. In the semiarid environment,recognization of rainfall event is significant for distinguishing different runoff events caused by natural rainfall and recording the related hydrological processes simultaneously, especially in consecutive rainy days. However, how to define one single rainfall event in the real world? How long the interval between two parts of rainfall is considered as an independent events How to define the corresponding runoff and erosion caused by such rainfall events? All these important problems need to be solved. The displacement method is tried for treating water samples. The method is relative economical and effective, only need some pycnometer, and the data quality can be ensured. Therefore, we sug- gest using this method,especially in the high erosive regions. Meanwhile, the citation of material and uzilization of information from runoff-plot measurements should be carefully amended and verified, and can not be used without any verification.

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陈瑾.水土保持径流小区监测方法探讨——以甘肃省定西市安家沟监测点为例[J].水土保持通报,2009,(2):94-96

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  • 收稿日期:2008-08-18
  • 最后修改日期:2008-12-30
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  • 在线发布日期: 2014-11-26
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