| 引用本文: | 周莉,李致家,韩通.基于地形地貌资料的Nash单位线参数规律研究.湖泊科学,2016,28(5):1141-1147. DOI:10.18307/2016.0525 |
| ZHOU Li,LI Zhijia,HAN Tong.Study on the parameter regularity of Nash Unit Hydrograph based on DEM and geomorphic data. J. Lake Sci.2016,28(5):1141-1147. DOI:10.18307/2016.0525 |
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| 摘要: |
| 为了将Nash单位线应用在无资料地区，基于DEM研究Nash单位线的参数规律.以皖南山区若干中小流域为试验流域，率定Nash单位线参数；利用ArcGIS 10.1提取的地形地貌因子和地表覆盖类型对Nash单位线参数进行回归分析和通径分析，建立基于DEM的Nash单位线参数推求公式，并进行检验.回归分析结果表明该推求公式回归效果显著，具有统计学意义；通径分析结果表明面积坡度是最根本的解释变量，对Nash单位线参数起决定作用.基于DEM的Nash单位线参数推求公式不依赖于实测资料，可在无资料山区流域推广应用. |
| 关键词: Nash单位线 地形地貌因子 地表覆盖类型 多元回归分析 通径分析 |
| DOI：10.18307/2016.0525 |
| 分类号: |
| 基金项目:国家自然科学基金项目（41130639，51179045）、水利部公益项目（201501022，201401034，201301068）和淮河流域气象开放研究基金项目（HRM201404）联合资助. |
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| Study on the parameter regularity of Nash Unit Hydrograph based on DEM and geomorphic data |
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ZHOU Li, LI Zhijia, HAN Tong
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College of Hydrology and Water Resources, Hohai University, Nanjing 210098, P. R. China
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| Abstract: |
| In order to apply Nash Unit Hydrograph to ungauged basins, we studied the parameter regularity of Nash Unit Hydrograph based on the DEM data. The 29 medium and small basins in Wannan mountainous watershed are used as experimental basins to calibrate the parameters of Nash Unit Hydrograph. Geomorphic parameters and surface land cover types obtained by ArcGIS 10.1 are adopted to make multiple regression analysis and path analysis of the parameters, and establish the formula which calculates the parameters of Nash Unit Hydrograph based on the DEM. The result of regression analysis shows that the formula has high statistical significance. The result of path analysis shows that slope is the fundamental explanatory variable, which plays a decisive role in calculating the parameters of Nash Unit Hydrograph. The formula independent on measured data can be generalized and applied to ungauged basins. |
| Key words: Nash Unit Hydrograph geomorphic parameters surface land cover types multiple regression analysis path analysis |
