| 基于GIS对新安江模型的改进初探 |
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| 引用本文： | 李莉莉,孔凡哲.基于GIS对新安江模型的改进初探[J].水文,2006,26(5):33-37. |
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| 作者姓名： | 李莉莉 孔凡哲 |
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| 作者单位： | 中国矿业大学,资源与地球科学学院,江苏,徐州,221008 |
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| 基金项目： | 中国矿业大学校科研和教改项目 |
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| 摘 要： | 新安江模型能较好解决降雨时空分布问题,但忽略了其他分布不均的影响。流域汇流特征在很大程度上取决于流域形状特征和地形分布。提出一种方法,利用数字高程模型(DEM)划分子流域,提取各单元流域的平均坡度和最大汇流路径长度,以最大汇流路径长度推求形状系数,并将形状系数和平均坡度引入模型结构中,建立其与汇流参数之间的相关关系,使新安江模型能同时考虑降雨、流域形状以及地形分布。将改进后的模型应用于沿渡河流域进行验证,效果良好。
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| 关 键 词： | 新安江模型 数字高程模型 形状系数 平均坡度 消退系数 |
| 文章编号： | 1000-0852（2006）05-0033-05 |
| 收稿时间： | 2005-11-15 |
| 修稿时间： | 2005-11-15 |
Improvement of Xin'anjiang Model Based on GIS |
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| LI Li-li,KONG Fan-zhe.Improvement of Xin''anjiang Model Based on GIS[J].Hydrology,2006,26(5):33-37. |
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| Authors: | LI Li-li KONG Fan-zhe |
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| Abstract: | In Xin'anjiang model, problem of the spatial distribution of rainfall has been well resolved while other non-uniform distributions are ignored. In fact, the runoff concentration behaviors of a basin is largely depended on topographic characteristics. This paper put forward a new method, in which digital elevation model (DEM) was used to differentiate sub-basins and to extract average slope and maximum length of flow concentration which makes a positive contribution to calculate shape coefficient. On the basis of adding shape coefficient and average slope into Xin'anjiang model, the relationship between this two factors and runoff concentration parameters was established to make sure that the effects of both shape and topography can also be concerned In Xin' anjiang model at the same time. The improved model has been used to forecast floods in Yanduhe River Basin with good results being obtained. |
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| Keywords: | Xin'anjiang model digital elevation model shape coefficient average slope recession coefficient |
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